Skip to content
Johns Manville DynaGrip Self-Adhering SBS Modified Bitumen Cap Sheet, 39.375 in. x 32 ft. 10 in.
Regular price $142.00Orders start at $399 — combine any items to reach the minimum. Learn more
Johns Manville DynaGrip Self-Adhering SBS Modified Bitumen Cap Sheet, 39.375 in. x 32 ft. 10 in.
JM DynaGrip Cap Sheet is a self-adhering, SBS modified bitumen cap sheet in a 39.375 in. x 32 ft. 10 in. roll, backed with an easy-to-peel plastic film so it installs without hot asphalt or heat-welding. Available in Terra Cotta, Burnt Sienna and Weathered Wood granule finishes. It is used as the cap membrane in BUR and modified bitumen roof systems.
Key Features:
- Self-Adhering Install: Self-adhering modified bitumen with an easy-to-peel plastic film on the bottom of the sheet allows installation without hot asphalt or heat-welding.
- SBS Rubber Blend: High-quality SBS rubber and asphalt blend provides full recovery after 100% elongation and lends elasticity and flexibility to the sheet.
- Fiber Glass Mat: Fiber glass reinforcement mat offers excellent dimensional stability and tensile strength and withstands differential movement.
- Ceramic-Coated Granules: Ceramic-coated roofing granules are engineered for optimal embedment in the SBS-blend sheet and promote excellent long-term adhesion.
- Three Granule Colors: Available in Terra Cotta, Burnt Sienna and Weathered Wood to match project aesthetics.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Johns Manville |
| Sell unit | 1 roll, 39.375 in. x 32 ft. 10 in. |
| Product line | JM DynaGrip |
| Material | SBS modified bitumen on fiber glass reinforcement mat |
| Color / finish | Ceramic-coated roofing granules |
| Available colors | Terra Cotta, Burnt Sienna, Weathered Wood |
| Available sizes | 39.375 in. x 32 ft. 10 in. |
| Dimensions | 39.375 in. x 32 ft. 10 in. per roll |
| Finish / texture | Ceramic-coated granule surface |
| Intended use | Cap sheet for commercial BUR and modified bitumen roofing systems |
Coverage & How Much You Need:
Each roll is 39.375 in. wide and 32 ft. 10 in. long, roughly 107.7 sq. ft. before laps. Size the job on roof square footage plus manufacturer-specified head and side laps.
Fit and Compatibility:
Designed as the cap sheet in Johns Manville BUR and modified bitumen systems. Self-adhesive application eliminates the need for hot asphalt or torch; use appropriate primers and detailing products per system requirements.
Frequently Asked Questions (FAQ):
Q: How is the sheet installed?
A: The sheet is self-adhering with a peel-away plastic release film on the bottom, so it needs no hot asphalt or heat-welding.
Q: What colors are available?
A: Terra Cotta, Burnt Sienna and Weathered Wood ceramic-coated granule finishes.
Q: How much does one roll cover?
A: One roll measures 39.375 in. x 32 ft. 10 in., about 107.7 sq. ft. before accounting for laps.
Q: What makes the sheet flexible?
A: The SBS rubber and asphalt blend gives full recovery after 100% elongation, adding elasticity and flexibility.
Q: What reinforcement is used?
A: A fiber glass reinforcement mat that provides dimensional stability, tensile strength and resistance to differential movement.
Q: How do the granules bond?
A: Ceramic-coated granules are engineered for optimal embedment in the SBS-blend sheet, promoting long-term adhesion.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Choose DynaGrip when you want a granule-faced cap sheet without torch or kettle equipment; the peel-and-stick film speeds up detail-sensitive areas. Check substrate dryness and temperature before adhering, and roll the sheet firmly to bond fully. Pick the granule color early since the cap sheet is the visible roof surface.
Roof membrane work requires fall protection and careful handling; ensure the substrate is clean and dry before adhering to achieve a watertight bond.
Get JM DynaGrip Self-Adhering Cap Sheet for a clean, no-flame cap membrane on your next roof.
All third party trademarks, including logos and icons, referenced on our website and product pages remain the property of their respective owners. Unless specifically identified as such, Arbor's use of third party trademarks does not indicate any relationship, affiliation, sponsorship, or endorsement between Arbor Home and the owners of these trademarks. Any references by Arbor Home to third party trademarks are to identify the corresponding third party goods.
