Johns Manville SBS Roofing Systems

With over three decades of experience producing modified bitumen, we understand the science of formulating systems that last.

JM logo format A-293.pngOur SBS is a premium modified bitumen engineered specifically for elasticity. It is made to withstand even the harshest environments.

SBS is the most customizable of our low-slope commercial roofing products with glass, polyester and composite reinforcements. It can be installed with the widest variety of application methods including cold applied, heat weld, self-adhered, mechanically fastened, and hot applied applications.
 


JM DynaBase

DynaBase

jm-sbs-dynabase-prodImg.jpegFiber glass-reinforced SBS base or ply sheet.

Meets the requirements of ASTM D 6163, Type I, Grade S

DynaBase is used as a fiber glass-reinforced base or ply sheet in a variety of multi-ply roofing systems.

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs.

Fiber Glass Reinforcement Mat: Offers excellent dimensional stability and tensile strength and withstands differential movement. Because it has no thermal memory less time is needed to relax the sheet, allowing for ease of installation. The fiber glass mat also has good lay-flat characteristics, contributing to better aesthetics.

Surfacing: Fine mineral parting agent on both sides of the sheet.


DynaBase HW

jm-sbs-dynabaseHW-prodimg.jpegFiber glass-reinforced SBS base or ply sheet.

Meets the requirements of ASTM D 6163, Type 1, Grade S

DynaBase HW is used as a fiber glass-reinforced base or ply sheet in a variety of multi-ply roofing systems.

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs.

Fiber Glass Reinforcement Mat: Offers excellent dimensional stability and tensile strength and withstands differential movement. Because it has no thermal memory less time is needed to relax the sheet, allowing for ease of installation. The fiber glass mat also has good lay-flat characteristics.

Surfacing: Fine mineral parting agent on the top side of the sheet. A polyolefin burn-off film on the bottom side enables the product to be applied using heat welding techniques.


DynaBase PR

jm-sbs-dynabase-prodImg.jpegPolyester-reinforced SBS base or ply sheet.

Meets the requirements of ASTM D 6164, Type 1, Grade S
DynaBase PR is used as a polyester-reinforced base or ply sheet in a variety of multi-ply roofing systems.

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs.

Polyester-Reinforcement Mat: Polyester mat with bi-directional glass-scrim reinforcement offers robust tear strength and puncture resistance, allowing for high wind performance and an excellent hail rating. The sheet also exhibits strong dimensional stability and enhanced elongation.

Surfacing: Fine mineral parting agent on both sides.


JM DynaClad

DynaClad

jm-sbs-dynaclad-prodImg.jpgFiber glass-reinforced, SBS aluminum foil-surfaced cap or flashing sheet.

Meets or exceeds the criteria for ASTM D 6298

DynaClad is used as a fiber glass-reinforced cap or flashing sheet in a variety of multi-ply roofing systems.
Aluminum Foil Surface: Provides high reflectivity, reducing heat load on the roof membrane and potentially lowering air conditioning energy costs.

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs.

Fiber Glass Reinforcement Mat: Offers excellent dimensional stability and tensile strength and withstands differential movement. Because it has no thermal memory less time is needed to relax the sheet, allowing for ease of installation. The fiber glass mat also has good lay-flat characteristics.


DynaClad Copper

jm-dynaclad-copper-prodImg.jpegFiber glass-reinforced, SBS copper foil-surfaced cap or flashing sheet.

Meets or exceeds the criteria for ASTM D 6298

DynaClad Copper is used as a fiber glass-reinforced cap or flashing sheet in a variety of multi-ply roofing systems.
Copper Foil Surface: Provides high reflectivity, reducing heat load on the roof membrane and potentially lowering air conditioning energy costs.

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs.

Fiber Glass Reinforcement Mat: Offers excellent dimensional stability and tensile strength and withstands differential movement. Because it has no thermal memory less time is needed to relax the sheet, allowing for ease of installation. The fiber glass mat also has good lay-flat characteristics.


JM DynaFast

DynaFast 180 HW

jm-dynafast-hw-180-prodImg.jpgDynaFast 180 HW is a heat-weldable base or ply sheet for use in mechanically fastened systems.

Meets the requirements of ASTM D 6164, Type I, Grade S

DynaFast 180 HW is a heat weldable base or ply sheet for use in mechanically fastened systems.

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs.

Polyester-Reinforced Mat: Polyester mat with bidirectional glass-scrim reinforcement offers robust tear strength and puncture resistance, allowing for high wind performance and an excellent hail rating. The sheet also exhibits strong dimensional stability and enhanced elongation.

Polyolefin Burn-Off Film: Promotes ease of heat welding.


DynaFast 180 S

jm-dynafast-180-S-prodImg.pngDynaFast 180 S is a base or ply sheet for use in mechanically fastened systems.

Meets the requirements of ASTM D 6164, Type I, Grade S

DynaFast 180 S is a base or ply sheet for use in mechanically fastened systems.
Fine Mineral Parting Agent: A fine material parting agent is applied to both sides of the product. This product does not have a surface finish and must be used in constructions that will provide protection from UV (ultraviolet light) and the elements.

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs.

Polyester-Reinforced Mat: Polyester mat with bidirectional glass-scrim reinforcement offers robust tear strength and puncture resistance, allowing for high wind performance and an excellent hail rating. The sheet also exhibits strong dimensional stability and enhanced elongation.


DynaFast 250 HW

jm-dynafast-250HW-prodImg.jpgDynaFast 250 HW is a heat weldable base or ply sheet for use in mechanically fastened systems.

Meets the requirements of ASTM D 6164, Type II, Grade S

DynaFast 250 HW is a heat weldable base or ply sheet for use in mechanically fastened systems.

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs.

Heavy Duty Polyester-Reinforcement Mat: Provides excellent tensile strength, toughness, and puncture resistance and can accommodate stresses created by typical roof top expansion and contraction forces.

Polyolefin Burn-Off Film: Promotes ease of heat welding.


JM DynaFlex

DynaFlex

jm-dynaflex-prodImg.jpgComposite-reinforced, SBS mineral-surfaced flashing sheet.

Meets or exceeds the criteria for ASTM D 6221, Type I

DynaFlex is used as a composite-reinforced cap sheet membrane in a variety of multi-ply roofing systems.

Ceramic-Coated Roofing Granules: Specifically engineered for optimal embedment in the SBS-blend sheet. The ceramic coating promotes excellent long-term adhesion.

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs.

Fiber Glass/Polyester Reinforcement Mat: Combines the excellent tensile strength, toughness and puncture resistance of a polyester mat with the dimensional stability and lay-flat characteristics of fiber glass.


DynaFlex CR

jm-dynaflexCR-prodImg.jpgComposite-reinforced, SBS, acrylic-coated, mineral-surfaced cool roof flashing sheet.

Meets or exceeds the criteria for ASTM D 6221, Type I

DynaFlex CR is used as a composite-reinforced cool roof cap sheet membrane in a variety of multi-ply roofing systems.

Ceramic-Coated Roofing Granules With Factory-Applied Cool Roof Coating: The cool roof technology combines the proven UV protection of ceramic-coated granules with a highly reflective coating, offering long-term performance and potential energy savings. Color: White only.

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs.

Fiber Glass/Polyester Reinforcement Mat: Combines the excellent tensile strength, toughness and puncture resistance of a polyester mat with the dimensional stability and lay-flat characteristics of fiber glass.


DynaFlex CR G

jm-dynaflex-cr-g-prodImg.jpegComposite-reinforced, SBS reflective mineral-surfaced, cool roof flashing sheet

Meets the requirements of ASTM D 6221, Type I, Grade G

DynaFlex CR G  is used as a composite-reinforced cool roof cap sheet membrane in a variety of multi-ply roofing systems.

Reflective Roofing Granules: Specifically engineered for high reflectivity, durability and optimal embedment in the SBS modified bitumen sheet.

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The thicker JM SBS coating provides more waterproofing value.

Fiber Glass/Polyester Reinforcement Mat: The inorganic fiber glass reinforcement, in conjunction with the polyester, provides stability, toughness and puncture resistance to the product, and resists moisture absorption.


JM DynaGlas

DynaGlas

jm-dynaglas-prodImg.jpegFiber glass-reinforced, SBS, , mineral-surfaced cap or flashing sheet.

Meets the requirements of ASTM D 6163, Type I, Grade G

DynaGlas is used as a fiber glass-reinforced mineral-surfaced cap sheet in a variety of multi-ply roofing systems.

Ceramic-Coated Roofing Granules: Specifically engineered for optimal embedment in the SBS-blend sheet. The ceramic coating promotes excellent long-term adhesion.

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs.

Fiber Glass Reinforcement Mat: Offers excellent dimensional stability and tensile strength and withstands differential movement. Because it has no thermal memory less time is needed to relax the sheet, allowing for ease of installation. The fiber glass mat also has good lay-flat characteristics.


DynaGlas 30 FR

jm-dynaglas-30FR-prodImg.jpgFire-retardant, fiber glass-reinforced, SBS, mineral-surfaced cap sheet.

Meets the requirements of ASTM D 6163, Type 1, Grade G

DynaGlas 30 FR is used as a fiber glass-reinforced mineral-surfaced cap sheet in a variety of multi-ply roofing systems.

Ceramic-Coated Roofing Granules: Specifically engineered for optimal embedment in the SBS-blend sheet. The ceramic coating promotes excellent long-term adhesion.

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs. The FR blend contains additional fire-retardant additives.

Fiber Glass Reinforcement Mat: Offers excellent dimensional stability and tensile strength and withstands differential movement. Because it has no thermal memory less time is needed to relax the sheet, allowing for ease of installation. The fiber glass mat also has good lay-flat characteristics.
 


DynaGlas FR

jm-dynaglasFR-prodImg.jpgFire-retardant, fiber glass-reinforced, SBS, mineral-surfaced cap sheet.

Meets the requirements of ASTM D 6163, Type 1, Grade G

DynaGlas FR is used as a fiber glass-reinforced mineral-surfaced cap sheet in a variety of multi-ply roofing systems.

Ceramic-Coated Roofing Granules: Specifically engineered for optimal embedment in the SBS-blend sheet. The ceramic coating promotes excellent long-term adhesion.

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs. The FR blend contains additional fire-retardant additives.

Fiber Glass Reinforcement Mat: Offers excellent dimensional stability and tensile strength and withstands differential movement. Because it has no thermal memory less time is needed to relax the sheet, allowing for ease of installation. The fiber glass mat also has good lay-flat characteristics.


DynaGlas FR CR

jm-dynaglasFR-CR-prodImg.jpegFire-retardant, fiberglass-reinforced, SBS, acrylic-coated, mineral-surfaced cool roof cap sheet.

Meets the requirements of ASTM D 6163, Type 1, Grade G

DynaGlas FR CR is used as a fiber glass-reinforced cool roof cap sheet in a variety of multi-ply roofing systems.

Ceramic-Coated Roofing Granules With Factory-Applied Cool Roof Coating: The cool roof technology combines the proven UV protection of ceramic-coated granules with a highly reflective coating, offering long-term performance and potential energy savings. Color: White only.

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs. The FR blend contains additional fire-retardant additives.

Fiber Glass Reinforcement Mat: Offers excellent dimensional stability and tensile strength and withstands differential movement. Because it has no thermal memory less time is needed to relax the sheet, allowing for ease of installation. The fiber glass mat also has good lay-flat characteristics, contributing to better aesthetics.


DynaGlas FR CR G

jm-dynaglas-fr-cr-g-prodImg.jpegFire-Retardant, Fiber Glass-Reinforced, SBS Reflective Mineral-Surfaced, Cool Roof Cap Sheet

Meets the requirements of ASTM D 6163, Type I, Grade G

Reflective Roofing Granules: Specifically engineered for high reflectivity, durability and optimal embedment in the SBS modified bitumen sheet.

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet and contains fire-retardant additives. The thicker JM SBS coating provides more waterproofing value.

Fiber Glass Reinforcement Mat: Offers excellent dimensional stability and tensile strength and withstands differential movement. Because it has no thermal memory less time is needed to relax the sheet, allowing for ease of installation. The fiber glass mat also has good lay-flat characteristics, contributing to better aesthetics.


JM DynaGrip

DynaGrip Base SA/SA

jm-dynagrip-base-sa-sa-prodImg.jpgSelf-adhering both sides, fiber glass-reinforced SBS base sheet.

Meets the requirements of ASTM D 4601

High-Quality SBS Rubber and Asphalt Blend: Provides full recovery properties after 100% elongation and lends elasticity and flexibility to the sheet.

Fiber Glass Reinforcement Mat: Offers excellent dimensional stability and tensile strength and withstands differential movement.

Two-Sided Self-Adhering Modified Bitumen: The product’s self-adhering feature with an easy-to-peel plastic film on both sides of the sheet allows for installation without the need of hot asphalt or heat welding.


DynaGrip Base SD/SA

jm-dynagrip-base-sd-sa-prodImg.jpgSelf-adhering, fiber glass-reinforced SBS base sheet.

Meets the requirements of ASTM D 4601

Sand Top Surface: Allows for installation of a cap sheet with hot asphalt, an approved cold adhesive, or by using heat welding techniques.

High-Quality SBS Rubber and Asphalt Blend: Provides full recovery properties after 100% elongation and lends elasticity and flexibility to the sheet.

Fiber Glass Reinforcement Mat: Offers excellent dimensional stability and tensile strength and withstands differential movement.

Self Adhering Modified Bitumen: The product’s self-adhering feature with an easy-to-peel plastic film on the bottom of the sheet allows for installation without the need of hot asphalt or heat-welding.


DynaGrip Cap

jm-dynagrip-cap-prodImg.jpegSelf-adhering, fiber glass-reinforced SBS cap sheet.

Ceramic-Coated Roofing Granules: Specifically engineered for optimal embedment in the SBS-blend sheet. The ceramic coating promotes excellent long-term adhesion.

High-Quality SBS Rubber and Asphalt Blend: Provides full recovery properties after 100% elongation and lends elasticity and flexibility to the sheet.

Fiber Glass Reinforcement Mat: Offers excellent dimensional stability and tensile strength and withstands differential movement.

Self Adhering Modified Bitumen: The product’s self-adhering feature with an easy-to-peel plastic film on the bottom of the sheet allows for installation without the need of hot asphalt or heat-welding.


JM DynaKap

DynaKap FR T1

jm-dynakap-fr-t1-prodImg.jpegFire-retardant, fiber glass/polyester-reinforced, SBS, mineral-surfaced cap sheet.

Meets the requirements of ASTM D 6162, Type 1, Grade G

DynaKap FR T1 is used as a premium fiber glass/polyesterreinforced mineral-surfaced cap sheet in a variety of multi-ply roofing systems.

Ceramic-Coated Roofing Granules: Specifically engineered for optimal embedment in the SBS-blend sheet. The ceramic coating promotes excellent long-term adhesion. Granules are available in White or Black.

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs. The FR blend contains additional fire-retardant additives.

Fiber Glass/Polyester Reinforcement Mat: Combines the excellent tensile strength, toughness and puncture resistance of a polyester mat with the dimensional stability and lay-flat characteristics of fiber glass.


DynaKap FR T1 CR

jm-dynakap-fr-t1-hw-cr-g-prodImg.jpegFire-retardant, fiber glass/polyester-reinforced, SBS, acrylic -coated, mineral-surfaced cool roof cap sheet.

Meets the requirements of ASTM D 6162, Type 1, Grade G

DynaKap FR T1 CR is used as a premium fiber glass/polyesterreinforced cool roof cap sheet in a variety of multi-ply roofing systems.

Ceramic-Coated Roofing Granules With Factory-Applied Cool Roof Coating: The cool roof technology combines the proven UV protection of ceramic-coated granules with a highly reflective coating, offering long-term performance and potential energy savings. 

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs. The FR blend contains additional 
fire-retardant additives.

Fiber Glass/Polyester Reinforcement Mat: Combines the excellent tensile strength, toughness and puncture resistance of a polyester mat with the dimensional stability and lay-flat characteristics of fiber glass.

Color: Bright White only.
 


DynaKap FR T1 CR G

jm-dynakap-fr-t1-hw-cr-g-prodImg.jpegFire-Retardant, Fiber Glass/Polyester-Reinforced, SBS Reflective Mineral-Surfaced, Cool Roof Cap or Flashing Sheet

Meets the requirements of ASTM D 6162, Type I, Grade G

Reflective Roofing Granules: Specifically engineered for high reflectivity, durability and optimal embedment in the SBS modified bitumen sheet.

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet and contains fire-retardant additives. The thicker JM SBS coating provides more waterproofing value.

Fiber Glass/Polyester Reinforcement Mat: Provides stability, toughness and puncture resistance to the product and resists moisture absorption. The reinforcement also provides high tensile strength and affords better natural resistance to the other factors which affect roof performance.

Color: Bright White only


DynaKap FR T1 HW

jm-dynakap-fr-t1-hw-prodImg.jpegA premium fiber glass/polyester reinforced mineral-surfaced cap sheet in a variety of multi-ply roofing systems.

Meets the requirements of ASTM D 6162, Type I, Grade G

DynaKap FR T1 HW is used as a premium fiber glass/polyesterreinforced mineral-surfaced cap sheet in a variety of multi-ply roofing systems.

Ceramic-Coated Roofing Granules: Specifically engineered for optimal embedment in the SBS-blend sheet. The ceramic coating promotes excellent long-term adhesion. 

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs. The FR blend contains additional fire-retardant additives.

Fiber Glass/Polyester Reinforcement Mat: Combines the excellent tensile strength, toughness and puncture resistance of a polyester mat with the dimensional stability and lay-flat characteristics of fiber glass. 

Polyolefin Burn-Off Film: Promotes ease of heat welding.

Colors: White or Black.


DynaKap FR T1 HW CR G

jm-dynakap-fr-t1-hw-cr-g-prodImg.jpegFire-Retardant, Fiber Glass/Polyester-Reinforced, SBS Reflective Mineral-Surfaced, Cool Roof Cap or Flashing Sheet

Meets the requirements of ASTM D 6162, Type I, Grade G

Reflective Roofing Granules: Specifically engineered for high reflectivity, durability and optimal embedment in the SBS modified bitumen sheet.

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet and contains fire-retardant additives. The thicker JM SBS coating provides more waterproofing value.

Fiber Glass / Polyester Reinforcement Mat: Provides stability, toughness and puncture resistance to the product and resists moisture absorption. The reinforcement also provides high tensile strength and affords better natural resistance to the other factors which affect roof performance.

Polyolefin Burn-Off Film: Promotes ease of heat welding.

Color: Bright White only


DynaKap T1

jm-dynakap-t1-prodImg.jpgFiber glass/polyester-reinforced, SBS, mineral-surfaced cap sheet.

Meets the requirements of ASTM D 6162, Type I, Grade G

DynaKap T1 is used as a fiber glass/polyester-reinforced mineralsurfaced cap sheet in a variety of multi-ply roofing systems.

Ceramic-Coated Roofing Granules: Specifically engineered for optimal embedment in the SBS-blend sheet. The ceramic coating promotes excellent long-term adhesion. Granules are available in White or Black.

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs.

Fiber Glass/Polyester Reinforcement Mat: Combines the excellent tensile strength, toughness and puncture resistance of a polyester mat with the dimensional stability and lay-flat characteristics of fiber glass.

Colors: White or Black.
 


JM DynaLastic

DynaLastic 180

jm-dynalastic-180-prodImg.jpgPolyester-reinforced, SBS, mineral-surfaced cap or flashing sheet.

Meets the requirements of ASTM D 6164, Type I, Grade G

DynaLastic 180 is used as a polyester-reinforced mineral-surfaced cap or flashing sheet in a variety of multi-ply roofing systems.

Ceramic-Coated Roofing Granules: Specifically engineered for optimal embedment in the SBS-blend sheet. The ceramic coating promotes excellent long-term adhesion.

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs.

Polyester Reinforcement Mat: Polyester mat with bidirectional glass-scrim reinforcement offers robust tear strength and puncture resistance, allowing for high wind performance and an excellent hail rating. The sheet also exhibits strong dimensional stability and enhanced elongation.
 


DynaLastic 180 FR

jm-dynalastic-180-fr-prodImg.jpgFire-retardant, polyester-reinforced, SBS, mineral-surfaced cap or flashing sheet.

Meets the requirements of ASTM D 6164, Type I, Grade G

DynaLastic 180 FR is used as a polyester-reinforced mineral-surfaced cap or flashing sheet in a variety of multi-ply roofing systems.

Ceramic-Coated Roofing Granules: Specifically engineered for optimal embedment in the SBS-blend sheet. The ceramic coating promotes excellent long-term adhesion. 

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs. The FR blend contains additional fire-retardant additives.

Polyester-Reinforced Mat: Polyester mat with bidirectional glass-scrim reinforcement offers robust tear strength and puncture resistance, allowing for high wind performance and an excellent hail rating. The sheet also exhibits strong dimensional stability and enhanced elongation.

Colors: White or Black.


DynaLastic 180 FR CR

jm-dynalastic-180-fr-cr-prodImg.jpgFire-retardant, polyester-reinforced SBS, acrylic-coated, mineral-surfaced cool roof cap or flashing sheet.

Meets the requirements of ASTM D 6164, Type I, Grade G

DynaLastic 180 FR CR is used as a polyester-reinforced cool roof cap or flashing sheet in a variety of multi-ply roofing systems.

Ceramic-Coated Roofing Granules With Factory-Applied Cool Roof Coating: The cool roof technology combines the proven UV protection of ceramic-coated granules with a highly reflective coating, offering long-term performance and potential energy savings.

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs. The FR blend contains additional fire-retardant additives.

Polyester-Reinforced Mat: Polyester mat with bidirectional glass-scrim reinforcement offers robust tear strength and puncture resistance, allowing for high wind performance and an excellent hail rating. The sheet also exhibits strong dimensional stability and enhanced elongation.

Color: Bright White only


DynaLastic 180 FR CR G

jm-dynalastic-180-fr-cr-g-prodImg.jpegFire-Retardant, Polyester-Reinforced, SBS Reflective Mineral-Surfaced, Cool Roof Cap or Flashing Sheet

Meets the requirements of ASTM D 6164, Type I, Grade G

Reflective Roofing Granules: Specifically engineered for high reflectivity, durability and optimal embedment in the SBS modified bitumen sheet.

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet and contains fire-retardant additives. The thicker JM SBS coating provides more waterproofing value.

Polyester Reinforcement Mat: Polyester mat with bidirectional glass-scrim reinforcement offers robust tear strength and puncture resistance, allowing for high wind performance and an excellent hail rating. The sheet also exhibits strong dimensional stability and enhanced elongation.

Color: Bright White only


DynaLastic 180 S

jm-dynalastic-180-S-prodImg.jpgPolyester-reinforced SBS base or ply sheet.

Meets the requirements of ASTM D 6164, Type I, Grade S

DynaLastic 180 S is used as a polyester-reinforced base or ply sheet in a variety of multi-ply roofing systems.

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs.

Polyester Reinforcement Mat: Polyester mat with bidirectional glass-scrim reinforcement offers robust tear strength and puncture resistance, allowing for high wind performance and an excellent hail rating. The sheet also exhibits strong dimensional stability and enhanced elongation.

Surfacing: A fine material parting agent is applied to both sides of the product.


DynaLastic 250

jm-dynalastic-250-prodImg.jpgDynaLastic 250 is used as a premium polyester-reinforced cap or flashing sheet in a variety of multi-ply roofing systems.

Meets the requirements of ASTM D 6164, Type II, Grade G

DynaLastic 250 is used as a premium polyester-reinforced cap or flashing sheet in a variety of multi-ply roofing systems.

Ceramic-Coated Roofing Granules: Specifically engineered for optimal embedment in the SBS-blend sheet. The ceramic coating promotes excellent long-term adhesion.

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs.

Heavy Duty Polyester-Reinforcement Mat: Provides excellent tensile strength, toughness, and puncture resistance and can accommodate stresses created by typical roof top expansion and contraction forces.


DynaLastic 250 FR

jm-dynalastic-250-fr-prodImg.jpgFire-retardant, heavy-duty, polyester-reinforced, SBS, mineral-surfaced cap or flashing sheet.

Meets the requirements of ASTM D 6164, Type II, Grade G

DynaLastic 250 FR is used as a premium polyester-reinforced cap or flashing sheet in a variety of multi-ply roofing systems.

Ceramic-Coated Roofing Granules: Specifically engineered for optimal embedment in the SBS-blend sheet. The ceramic coating promotes excellent long-term adhesion.

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs. The FR blend contains additional fire-retardant additives.

Polyester-Reinforcement Mat: Provides excellent tensile strength, toughness, and puncture resistance and can accommodate stresses created by typical roof top expansion and contraction forces.


DynaLastic 250 FR CR

jm-dynalastic-250-fr-cr-prodImg.jpgFire-retardant, heavy-duty, polyester-reinforced, SBS, , acrylic-coated, mineral-surfaced cool roof cap or flashing sheet.

Meets the requirements of ASTM D 6164, Type II, Grade G

DynaLastic 250 FR CR is used as a premium polyester-reinforced cool roof cap or flashing sheet in a variety of multi-ply roofing systems. 

Ceramic-Coated Roofing Granules with Factory-Applied Cool Roof Coating: The cool roof technology combines the proven UV protection of ceramic-coated granules with a highly reflective coating, offering long-term performance and potential energy savings. 

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs. The FR blend contains additional fire-retardant additives.

Heavy Duty Polyester-Reinforcement Mat: Provides excellent tensile strength, toughness and puncture resistance, and it can accommodate stresses created by typical rooftop expansion and contraction forces.

Color: Bright White only


DynaLastic 250 FR CR G

jm-dynalastic-250-fr-cr-g-prodImg.jpgFire Retardant, Heavy Duty Polyester-Reinforced, SBS Reflective Mineral-Surfaced, Cool Roof Cap or Flashing Sheet

Meets the requirements of ASTM D 6164, Type II, Grade G

Reflective Roofing Granules: Specifically engineered for high reflectivity, durability and optimal embedment in the SBS modified bitumen sheet.

Elastomeric SBS Rubber and Asphalt Blend: Provides full recovery properties after 100% elongation, and lends elasticity and flexibility to the sheet and contains fire-retardant additives.

Heavy Duty Polyester Mat Reinforcement: A tough, nonwoven polyester mat provides excellent tensile strength, toughness and puncture resistance, and can accommodate stresses created by typical rooftop expansion and contraction forces.

Color: Bright White only


DynaLastic 250 S

jm-dynalastic-250-s-prodImg.jpgPolyester-reinforced SBS base or ply sheet.

Meets the requirements of ASTM D 6164, Type II, Grade S

DynaLastic 250 S is used as a polyester-reinforced base or ply sheet in a variety of multi-ply roofing systems.

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs.

Heavy Duty Polyester-Reinforcement Mat: Provides bidirectional glass-scrim reinforcement and offers robust tear strength and puncture resistance, allowing for high wind performance and excellent hail rating. The sheet also exhibits strong dimensional stability and enhanced elongation.

Surfacing: A fine material parting agent is applied to both sides of the product.


JM DynaPly

DynaPly T1

jm-dynaply-t1-prodImg.jpegFiber glass/polyester-reinforced SBS base or ply sheet.

Material meets the requirements of ASTM D 6162, Type I, Grade S

DynaPly T1 is used as a premium fiber glass/polyester-reinforced base or ply sheet in a variety of multi-ply roofing systems.

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs.

Fiber Glass/Polyester Reinforcement Mat: Combines the excellent tensile strength, toughness and puncture resistance of a polyester mat with the dimensional stability and lay-flat characteristics of fiber glass.

Non-Blocking Surface: Nonblocking surface does not have a surface finish and must be used in constructions that will provide protection from UV (ultraviolet light) and the elements.


JM DynaTred

DynaTred Walkway

jm-dynatred-walkway-prodImg.jpegPolyester-reinforced SBS base or ply sheet.

Preformed, skid-resistant roof protection pads consisting of modified asphalt, reinforcements and fillers with a ceramic granule surface on both sides. They are durable, resilient and maintenance free.

DynaTred and DynaTred Plus can be installed over built-up and modified bitumen roofing systems to provide an integral, skidresistant walkway for demanding service access needs.

Ceramic-Coated Roofing Granules: Specifically engineered for optimal embedment in the modified asphalt sheet. The ceramic coating promotes excellent long-term adhesion.

Easy Installation: Can be easily cut with a heavy-duty utility knife or circular saw with a carbide-tipped blade.

Colors: Available in either Black/White or White/White.


JM DynaWeld

DynaWeld 180 S

jm-dynaweld-180-S-prodimg.jpegPolyester-reinforced SBS base or ply sheet.

Meets the requirements of ASTM D 6164, Type I, Grade S

DynaWeld 180 S is used as a polyester-reinforced base or ply sheet in a variety of multi-ply roofing systems.

Fine Mineral Parting Agent: Nonblocking surface for use as a base sheet or ply sheet.

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs.

Polyester Reinforcement Mat: Polyester mat with bidirectional glass-scrim reinforcement offers robust tear strength and puncture resistance, allowing for high wind performance and an excellent hail rating. The sheet also exhibits strong dimensional stability and enhanced elongation.

Surfacing: Fine mineral parting agent on the top side of the sheet. A polyolefin burn-off film on the bottom side enables the product to be applied using heat welding techniques.


DynaWeld Base

jm-dynaweld-base-prodImg.jpegFiber glass-reinforced SBS base or ply sheet.

Meets the requirements of ASTM D 6163, Type I, Grade S

DynaWeld Base is used as a fiber glass-reinforced base or ply sheet in a variety of multi-ply roofing systems.

Fine Mineral Parting Agent: Nonblocking surface for use as a base sheet or ply sheet.
High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs.

Fiber Glass Reinforcement Mat: Offers excellent dimensional stability and tensile strength and withstands differential movement. Because it has no thermal memory less time is needed to relax the sheet, allowing for ease of installation. The fiber glass mat also has good lay-flat characteristics.

Polyolefin Burn-Off Film: Promotes ease of heat welding.


DynaWeld Cap

jm-dynaweld-cap-prodImg.jpegFiber glass-reinforced SBS mineral-surfaced cap sheet.

Meets the requirements of ASTM D 6163, Type I, Grade G 

DynaWeld Cap is used as a fiber glass-reinforced mineralsurfaced cap sheet in a variety of multi-ply roofing systems.

Ceramic-Coated Roofing Granules: Specifically engineered for optimal embedment in the SBS-blend sheet. The ceramic coating promotes excellent long term adhesion. 

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs.

Fiber Glass Reinforcement Mat: Offers excellent dimensional stability and tensile strength and withstands differential movement. Because it has no thermal memory less time is needed to relax the sheet, allowing for ease of installation. The fiber glass mat also has good lay-flat characteristics.

Polyolefin Burn-Off Film: Promotes ease of heat welding.


DynaWeld Cap 180

jm-dynaweld-180-S-prodimg.jpegPolyester-reinforced SBS mineral-surfaced cap sheet.

Meets the requirements of ASTM D 6164, Type I, Grade G 

DynaWeld Cap 180 is used as a polyester-reinforced mineralsurfaced cap or flashing sheet in a variety of multi-ply roofing systems.

Ceramic-Coated Roofing Granules: Specifically engineered for optimal embedment in the SBS-blend sheet. The ceramic coating promotes excellent long-term adhesion.

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs.

Polyester-Reinforcement Mat: Polyester mat with bidirectional glass-scrim reinforcement offers robust tear strength and puncture resistance, allowing for high wind performance and an excellent hail rating. The sheet also exhibits strong dimensional stability and enhanced elongation.

Polyolefin Burn-Off Film: Promotes ease of heat welding.

Colors: White, Black, Tan (Black and Tan may require extended lead times).


DynaWeld Cap 180 FR

jm-dynaweld-cap-180-fr-cr-g-prodImg.jpegFire-retardant, glass scrim/polyester-reinforced. SBS mineral-surfaced cap sheet.

Meets the requirements of ASTM D 6164, Type I, Grade G

DynaWeld Cap 180 FR is used as a polyester-reinforced mineralsurfaced cap or flashing sheet in a variety of multi-ply roofing systems.

Ceramic-Coated Roofing Granules: Specifically engineered for optimal embedment in the SBS-blend sheet. The ceramic coating promotes excellent long-term adhesion.

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs. The FR blend contains additional fire-retardant additives.

Polyester Reinforcement Mat: Polyester mat with bidirectional glass-scrim reinforcement offers robust tear strength and puncture resistance, allowing for high wind performance and an excellent hail rating. The sheet also exhibits strong dimensional stability and enhanced elongation.

Polyolefin Burn-Off Film: Promotes ease of heat welding.

Colors: White, Black and Tan (Black and Tan may require extended lead times.)
 


DynaWeld Cap 180 FR CR G

jm-dynaweld-cap-180-fr-cr-g-prodImg.jpegFire-Retardant, Polyester-Reinforced, SBS Reflective Mineral-Surfaced, Cool Roof Cap or Flashing Sheet

Meets the requirements of ASTM D 6164, Type I, Grade G

Reflective Roofing Granules: Specifically engineered for high reflectivity, durability and optimal embedment in the SBS modified bitumen sheet.

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet and contains fire-retardant additives. The thicker JM SBS coating provides more waterproofing value.

Polyester Reinforcement Mat: Polyester mat with bidirectional glass-scrim reinforcement offers robust tear strength and puncture resistance, allowing for high wind performance and an excellent hail rating. The sheet also exhibits strong dimensional stability and enhanced elongation.

Polyolefin Burn-Off Film: Promotes ease of heat welding.

Color: Bright White only


DynaWeld Cap 250

jm-dynaweld-cap-250-prodImg.jpegPolyester-reinforced, SBS mineral-surfaced cap sheet.

Meets the requirements of ASTM D 6164, Type II, Grade G

DynaWeld Cap 250 is used as a premium polyester-reinforced cap or flashing sheet in a variety of multi-ply roofing systems.

Ceramic-Coated Roofing Granules: Specifically engineered for optimal embedment in the SBS-blend sheet. The ceramic coating promotes excellent long-term adhesion. 

Fiber Glass/Polyester Reinforcement Mat: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs. The FR blend contains additional fire-retardant additives.

Heavy Duty Polyester-Reinforcement Mat: Provides excellent tensile strength, toughness, and puncture resistance and can accommodate stresses created by typical roof top expansion and contraction forces.

Polyolefin Burn-Off Film: Promotes ease of heat welding.

Colors: White, Black and Tan (Black and Tan may require extended lead times).


DynaWeld Cap 250 FR

jm-dynaweld-cap-250-prodImg.jpegFire-retardant, polyester-reinforced, SBS mineral-surfaced cap sheet.

Meets the requirements of ASTM D 6164, Type II, Grade G

DynaWeld Cap 250 FR is used as a premium polyester-reinforced cap or flashing sheet in a variety of multi-ply roofing systems.

Ceramic-Coated Roofing Granules: Specifically engineered for optimal embedment in the SBS-blend sheet. The ceramic coating promotes excellent long-term adhesion. 

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs. The FR blend contains additional fire-retardant additives.

Heavy Duty Polyester-Reinforcement Mat: Provides excellent tensile strength, toughness and puncture resistance, and it can accommodate stresses created by typical rooftop expansion and contraction forces.

Polyolefin Burn-Off Film: Promotes ease of heat welding.

Colors: White, Black and Tan (Black and Tan may require extended lead times).


DynaWeld Cap 250 FR CR G

jm-dynaweld-cap-250-prodImg.jpegFire-Retardant, Heavy Duty Polyester-Reinforced, SBS Reflective Mineral-Surfaced, Cool Roof Cap or Flashing Sheet

Meets the requirements of ASTM D 6164, Type II, Grade G

Reflective Roofing Granules: Specifically engineered for high reflectivity, durability and optimal embedment in the SBS modified bitumen sheet.

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet and contains fire-retardant additives. The thicker JM SBS coating provides more waterproofing value.

Heavy Duty Polyester-Reinforcement Mat: Provides excellent tensile strength, toughness and puncture resistance, and it can accommodate stresses created by typical rooftop expansion and contraction forces.

Polyolefin Burn-Off Film: Promotes ease of heat welding.

Color: Bright White only


DynaWeld Cap FR

jm-dynaweld-cap-prodImg.jpegFire-retardant, fiber glass-reinforced SBS mineral-surfaced cap sheet.

Meets the requirements of ASTM D 6163, Type I, Grade G

DynaWeld Cap FR is used as a fiber glass-reinforced mineralsurfaced cap sheet in a variety of multi-ply roofing systems.

Ceramic-Coated Roofing Granules: Specifically engineered for optimal embedment in the SBS-blend sheet. The ceramic coating promotes excellent long-term adhesion. 

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs. The FR blend contains additional fire-retardant additives.

Fiber Glass Reinforcement Mat: Offers excellent dimensional stability and tensile strength and withstands differential movement. Because it has no thermal memory less time is needed to relax the sheet, allowing for ease of installation. The fiber glass mat also has good lay-flat characteristics.

Polyolefin Burn-Off Film: Promotes ease of heat welding.

Colors: White, Black and Tan (Black and Tan may require extended lead times.)


DynaWeld Cap FR CR

jm-dynaweld-cap-prodImg.jpegFire-retardant, fiber glass-reinforced, SBS, , acrylic-coated, mineral-surfaced cool roof cap sheet.

Meets the requirements of ASTM D 6163, Type I, Grade G

DynaWeld Cap FR CR is used as a fiber glass-reinforced cool roof cap sheet in a variety of multi-ply roofing systems.

Ceramic-Coated Roofing Granules With Factory-Applied Cool Roof Coating: The cool roof technology combines the proven UV protection of ceramic-coated granules with a highly reflective coating, offering long-term performance and potential energy savings. 

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction experienced on all roofs. The FR blend contains additional fire-retardant additives.

Fiber Glass Reinforcement Mat: Offers excellent dimensional stability and tensile strength and withstands differential movement. Because it has no thermal memory less time is needed to relax the sheet, allowing for ease of installation. The fiber glass mat also has good lay-flat characteristics.

Polyolefin Burn-Off Film: Promotes ease of heat welding.

Color: Bright White only


DynaWeld Cap FR CR G

jm-dynaweld-cap-prodImg.jpegFire-Retardant, Fiber Glass-Reinforced, SBS Reflective Mineral-Surfaced, Cool Roof Cap or Flashing Sheet

Meets the requirements of ASTM D 6163, Type I, Grade G

Reflective Roofing Granules: Specifically engineered for high reflectivity, durability and optimal embedment in the SBS modified bitumen sheet.

High-Quality SBS Rubber and Asphalt Blend: Lends elasticity and flexibility to the sheet and contains fire-retardant additives. The thicker JM SBS coating provides more waterproofing value.

Fiber Glass Reinforcement Mat: Offers excellent dimensional stability and tensile strength and withstands differential movement. Because it has no thermal memory less time is needed to relax the sheet, allowing for ease of installation. The fiber glass mat also has good lay-flat characteristics, contributing to better aesthetics.

Polyolefin Burn-Off Film: Promotes ease of heat welding.

Color: Bright White only


JM GlasBase

GlasBase Plus

jm-glasbase-plus-prodImg.jpegFiber Glass-Reinforced, SBS Modified Bitumen Base or Ply Sheet

Meets the requirements of ASTM D 4601, Type II

GlasBase Plus is intended to be used as a base sheet in built up roofing or as a base or intermediate ply in modified bitumen systems.

SBS (Styrene-Butadiene-Styrene) Synthetic Rubber and High Quality Asphalt Blend: Brings elasticity and flexibility to the sheet; lays flat virtually eliminating wrinkles resulting in fast, efficient applications.

Fully-Coated Mat: No pinholes prevent asphalt bleed-through, eliminating splitting problems associated with excessive membrane attachment to nailable decks. Excellent nail retention properties and resistance to uplift forces. Virtually eliminates wrinkling, resulting in fast, efficient applications.

Non-porous Composition: Allows the product to be used as a ply sheet in systems that employ cold process mastics such as JM BUR Adhesive.

Fiber Glass Reinforcement Mat: Low moisture, excellent dimensional stability and resistance to rot make it an ideal replacement for organic base sheets. Provides a solid dimensionally stable substrate for other roofing membrane components.

Surfacing: Fine mineral parting agent


JM GlasKap

GlasKap CR G

jm-glaskap-cr-g-prodImg.jpegFiber Glass-Reinforced, BUR Reflective Mineral-Surfaced, Cool Roof Cap or Flashing Sheet

Meets the requirements of ASTM D 3909

GlasKap CR G is intended to be used as a cap or flashing sheet in built up roofing systems.

Reflective Roofing Granules: Specifically engineered for high reflectivity, durability and optimal embedment in the BUR asphalt sheet.

High-Quality Asphalt Coating: Lends elasticity and flexibility to the sheet and provides waterproofing value.

Fiber Glass Reinforcement Mat: Low moisture, excellent dimensional stability and resistance to rot make it an ideal replacement for organic cap sheets.

Color: Reflective cool roof bright white roofing granules.


JM GlasPly

GlasPly IV

jm-glasply-iv-prodImg.jpegFiber glass-reinforced, asphalt-coated ply sheet IV.

Material meets the requirements of ASTM D 2178, Type IV

GlasPly IV is intended for use as an interply in any built up roofing or modified bitumen roofing system.

Excellent Porosity: Easy to handle, lays flat, minimizes workmanshiprelated problems such as fishmouths, wrinkles and ridges. Allows the product to readily accept hot asphalt and disperses it throughout the entire felt, to stabilize asphalt after cooling.

Asphalt Impregnated, Fiber Glass Reinforcement Mat: Offers consistent tensile strength and tear resistance. Low moisture, excellent dimensional stability and resistance to rot make it an ideal replacement for organic ply sheets. Provides a solid dimensionally stable substrate for other roofing membrane components.

Laying Lines: Before the product is wound into rolls, it is imprinted with laying lines on the top surface so the roofing mechanic can install the felt with the proper exposure and provide the correct number of plies.

Surfacing: Liquid parting agent eliminates sticking when the felt is unrolled.


GlasPly Premier

jm-glasply-premier-prodImg.jpegPremium fiber glass-reinforced, asphalt-coated ply sheet VI.

Material meets the requirements of ASTM D 2178, Type VI

GlasPly Premier is intended for use as an interply in any built up roofing or modified bitumen roofing system.

Excellent Porosity: Allows the product to readily accept hot asphalt and disperse it throughout the entire felt, to stabilize the asphalt after cooling.

Asphalt Impregnated, Fiber Glass Reinforcement Mat: Delivers high tensile strength to resist splitting that can be caused by rooftop stresses. Low moisture, excellent dimensional stability and resistance to rot make it an ideal replacement for organic ply sheets. Provides a solid dimensionally stable substrate for other roofing membrane components.

Laying Lines: Before the product is wound into rolls, it is imprinted with laying lines on the top surface so the roofing mechanic can install the felt with the proper exposure and provide the correct number of plies

Surfacing: Liquid parting agent eliminates sticking when the felt is unrolled.


JM GlasTite

GlasTite Flexible

jm-glastite-flexible-prodImg.jpegPolyester/fiber glass-reinforced, asphalt-coated base, ply or flashing sheet.

Meets the requirements of ASTM D 4601, Type II 

GlasTite Flexible is intended to be used as a base sheet, ply sheet, or flashing membrane in built up roofing systems.

Fiber Glass/Polyester Composite Reinforcement Mat: Provides superior flexibility and conformability, making it easy and quick to install. Exceptionally high tensile strength delivers superior protection against splitting as well as excellent puncture and tear resistance to prevent damage often caused by rooftop traffic.

Ideal for Flashing Systems: Superior flexibility and conformability allows the mechanics to easily and quickly install tight flashing systems and make it ideal for all roof terminations, including parapet walls, skylights, roof penetrations, drains, vents and roof edges. GlasTite Flexible does not bridge at the cant and will not pull away from the substrate after it has been installed.

Laying Lines: Laying lines are imprinted on the top surface so the roofing mechanic can install the felt with the proper exposure and provide the correct number of plies.

Surfacing: Fine mineral parting agent


JM BaseGrip

JM BaseGrip SD/SA

jm-basegrip-sd-sa-prodImg.jpgSelf-adhering, fiber glass-reinforced SBS base sheet.

Meets the requirements of ASTM D 4601, Type II, and D 1970

JM BaseGrip™ SD/SA is designed for use in roofing systems where two or more plies of modified bitumen are desired. It may be used as the base ply when installed over an approved substrate.

Sand Top Surface: With a self adhering side lap that aids with faster installation and ease of use. Also allows for installation of a torchable cap sheet, hot asphalt, or an approved cold adhesive. Is ideal with heat welding.

SBS (Styrene-Butadiene-Styrene) Synthetic Rubber and High Quality Asphalt Blend: Brings elasticity and flexibility to the sheet; lays flat virtually eliminating wrinkles resulting in fast, efficient applications. The elongation and recovery properties allow the product to easily accommodate the continual expansion and contraction strains experienced on all roofs.

Fiber Glass Reinforcement Mat: Offers excellent dimensional stability, tensile strength, puncture resistance, and withstands differential movement.

Self Adhering Modified Bitumen: The product’s self-adhering feature with an easy-to-peel plastic film on the bottom of the sheet and top side lap aids with faster installation without the need of hot asphalt or heat welding.


JM CleanBond

CleanBond Base Sheet

jm-cleanbond-base-sheet-prodImg.jpegSelf-adhering/both sides, fiber glass-reinforced, fire-retardant SBS base sheet.

Meets the requirements of ASTM D 4601

High-Quality SBS Rubber and Asphalt Blend: Provides full recovery properties after 100% elongation and lends elasticity and flexibility to the sheet, and includes fire-retardant additives.

Fiber Glass Reinforcement Mat: Offers excellent dimensional stability and tensile strength and withstands differential movement.

Two-Sided Self-Adhering Modified Bitumen: The product’s self-adhering feature with an easy-to-peel plastic film on both sides of the sheet allows for installation without the need of hot asphalt or heat-welding.


JM CleanBond Cap

jm-cleanbond-cap-prodImg.jpgSelf-adhering, fiber glass-reinforced, fire-retardant SBS cap sheet.

Meets the requirements of ASTM D 6163, Type I, Grade G

Ceramic-Coated Roofing Granules: Specifically engineered for optimal embedment in the SBS-blend sheet. The ceramic coating promotes excellent long-term adhesion.

High-Quality SBS Rubber and Asphalt Blend: Provides full recovery properties after 100% elongation and lends elasticity and flexibility to the sheet, and includes fire-retardant additives.

Fiber Glass Reinforcement Mat: Offers excellent dimensional stability and tensile strength and withstands differential movement.

Self-Adhering Modified Bitumen: The product’s self-adhering feature with an easy-to-peel plastic film on the bottom side of the sheet allows for installation without the need of hot asphalt or heat-welding.


JM CleanBond Polyester Base Flashing

jm-cleanbond-polyester-base-flashing-prodImg.jpgSelf-adhering/both sides, polyester-reinforced, fire-retardant SBS base flashing.

High-Quality SBS Rubber and Asphalt Blend: Provides full recovery properties after 100% elongation and lends elasticity and flexibility to the sheet, and includes fire-retardant additives.

Polyester Reinforcement Mat: Provides excellent tensile strength, tear resistance and flexibility.

Two-Sided Self-Adhering Modified Bitumen: The product’s self-adhering feature with an easy-to-peel plastic film on both sides of the sheet allows for installation without the need of hot asphalt.


JM CleanBond Polyester Cap Flashing

jm-cleanbond-polyester-cap-flashing-prodImg.jpgSelf-adhering, polyester-reinforced SBS cap flashing.

Ceramic-Coated Roofing Granules: Specifically engineered for optimal embedment in the SBS-blend sheet. The ceramic coating promotes excellent long-term adhesion.

High-Quality SBS Rubber and Asphalt Blend: Provides full recovery properties after 100% elongation and lends elasticity and flexibility to the sheet. Designed for the sharp angle changes and turns found in flashing areas.

Polyester Reinforcement Mat: The 170 g/m2 polyester mat provides excellent tensile strength, tear resistance and flexibility.

Self-Adhering Modified Bitumen: The product’s self-adhering feature with an easy-to-peel plastic film on the bottom side of the sheet allows for installation without the need of hot asphalt.


JM Ice and Water Guard

JM Ice and Water Guard

jm-ice-water-guard-prodImg.jpgJM Ice and Water Guard is a self-adhering membrane.

Meets or exceeds the criteria of ASTM D 1970 and ICBO

JM Ice and Water Guard is a self-adhering membrane composed of a rubberized asphalt roofing sheet with a strong inorganic glass mat for reinforcement.

Fiber Glass Reinforcement Mat: Offers excellent dimensional stability and tensile strength and withstands differential movement. Because it has no thermal memory less time is needed to relax the sheet, allowing for ease of installation.

Surfacing: The top surface is embedded with fine inorganic granules. The back is covered with an easy-to remove plastic release film.


JM Vapor Barrier

JM Vapor Barrier SA

jm-vaporbarrier-sa.jpgPolyethylene-reinforced, self-adhering SBS vapor barrier.

Tri-laminate woven polyethylene, nonslip, UV-protected top surface provides temporary weather protection for 90 days. Provides high tensile strength and puncture resistance.

Self-sealing, high-quality SBS rubber and asphalt blend provides low air and vapor permeability.

Silicone release film allows for ease of self-adhering installation.


JM PermaPly 28

PermaPly 28

jm-permaply-28-prodImg.jpegFiber glass-reinforced, asphalt-coated lightweight base sheet.

Material meets the requirements of ASTM D 4601, Type II

PermaPly 28 is designed for use as the first or base sheet in built up roofing or modified bitumen roof assemblies.

Lightweight: Exceptionally pliable, easy to handle and lays flat.
Asphalt Coating: Makes it suitable as an intermediate or ply felt in cold-applied built-up and modified bitumen roof assemblies.

Ideal for Mechanical Attachment: Use where mechanical attachment of the membrane to the roof substrate or deck is desired.

Fiber Glass Reinforcement Mat: Low moisture, excellent dimensional stability and resistance to rot make it an ideal replacement for organic base or ply sheets. Provides a solid dimensionally stable substrate for other roofing membrane components.

Laying Lines: Laying lines are imprinted on the top surface so the roofing mechanic can install the felt with the proper exposure and provide the correct number of plies.

Surfacing: Fine mineral parting agent.


JM Ventsulation

Ventsulation

jm-ventsulation-prodImg.jpegFiber glass-reinforced, asphalt-coated venting base sheet.

Material meets the requirements of ASTM D 4897, Type II

Ventsulation Felt may be used as a base sheet for any built up roofing or modified bitumen roofing system to be installed over a substrate that potentially contains moisture.
1" Embossed Waffle Pattern Grid Channels: Promotes moisture vapor venting. Helps prevent blistering of asphalt-based roofs when installed over potential moisture-containing substrates such as: Re-covers over existing roof membranes, lightweight insulating fill or gypsum decks.

Fiber Glass Reinforcement Mat: Low moisture, excellent dimensional stability and resistance to rot make it an ideal replacement for organic base sheets. Provides a solid dimensionally stable substrate for other roofing membrane components.

Surfacing: Coarse minerals on one side.


Installation Supplies

Johns Manville supplies a full range of necessities for SBS system installation and maintenance, including:

  • JM SBS Accessories
  • Adhesives, Cleaners and Primers
  • Fasteners and Plates
  • Insulation and Coverboards

Contact Us for More Information


What's New

View All

Nov 26, 2018, 8:48 AM

Larimer/Shannon Group is celebrating its 15th anniversary. Together, our team has over 150 years of combined experience with products and systems associated with the commercial building envelope.…

View