Skip to content
Johns Manville DynaGrip SD/SA Polyester-Reinforced Base Sheet, 39-3/8 in. x 49 ft. 2 in., Black
Regular price $131.00Orders start at $399 — combine any items to reach the minimum. Learn more
Johns Manville DynaGrip SD/SA Polyester-Reinforced Base Sheet, 39-3/8 in. x 49 ft. 2 in., Black
JM DynaGrip SD/SA Base Sheet is a polyester-reinforced, self-adhering modified bitumen base sheet measuring 39-3/8 in. x 49 ft. 2 in. Its peel-and-stick bottom film allows installation without hot asphalt or heat welding, and it accepts cap sheets applied with hot asphalt, approved cold adhesive or heat welding. One roll per order.
Key Features:
- Self-adhering backing: An easy-to-peel plastic film on the bottom of the sheet permits installation without hot asphalt or heat welding.
- Versatile cap attachment: Allows installation of a cap sheet with hot asphalt, an approved cold adhesive, or heat welding techniques.
- Elastic recovery: Provides full recovery properties after 100% elongation, lending elasticity and flexibility to the sheet.
- Dimensional stability: Offers excellent dimensional stability and tensile strength and withstands differential movement.
- Polyester reinforcement: Polyester-reinforced construction supports durability in modified bitumen roof assemblies.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Johns Manville |
| Sell unit | 1 roll, 39-3/8 in. x 49 ft. 2 in. |
| Product line | JM DynaGrip Base SD/SA |
| Available colors | Black |
| Available sizes | 39-3/8 in. x 49 ft. 2 in. |
| Material | Modified bitumen base sheet, polyester reinforced |
| Color / finish | Black |
| Dimensions | 39-3/8 in. x 49 ft. 2 in. |
| Intended use | Self-adhering base sheet for BUR and modified bitumen roof systems |
| Application methods | Self-adhered (peel and stick); accepts cap sheet via hot asphalt, cold adhesive, or heat welding |
Coverage & How Much You Need:
One roll of 39-3/8 in. x 49 ft. 2 in. covers roughly 160 sq ft of roof area; figure laps and substrate conditions when estimating rolls.
Fit and Compatibility:
Part of Johns Manville BUR and modified bitumen roof systems; pairs with JM cap sheets applied with hot asphalt, approved cold adhesive, or heat welding. Follow JM system requirements for compatible substrates.
Frequently Asked Questions (FAQ):
Q: What comes in one order unit?
A: One roll of JM DynaGrip SD/SA Base Sheet, 39-3/8 in. x 49 ft. 2 in., black, polyester reinforced.
Q: Can I install this without a torch or mop?
A: Yes. The self-adhering underside with an easy-to-peel plastic film allows installation without hot asphalt or heat welding.
Q: What cap sheet attachment methods work over this base sheet?
A: A cap sheet can be installed with hot asphalt, an approved cold adhesive, or heat welding techniques.
Q: How much roof does a roll cover?
A: Each roll measures about 39-3/8 in. by 49 ft. 2 in., or roughly 160 sq ft before lap allowances.
Q: What makes the sheet flexible?
A: The sheet provides full recovery after 100% elongation and offers excellent dimensional stability and tensile strength, withstanding differential movement.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Self-adhered base sheets like DynaGrip SD/SA are a strong choice when torch or mop work is restricted or risky on a project. Prime and dry the substrate to specification before peeling the release film, roll the sheet firmly to maximize adhesion, and stagger laps to keep the membrane watertight. Confirm the JM system assembly and cap sheet attachment method before ordering so flashings and details line up.
Follow the manufacturer's application requirements for substrate preparation and membrane compatibility, and observe roof-safety and fall-protection practices during installation.
Order JM DynaGrip SD/SA Base Sheet for a self-adhered foundation on your next modified bitumen 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.
