{"product_id":"johns-manville-dynagrip-sd-sa-polyester-reinforced-base-sheet-39-3-8-in-x-49-ft-2-in-black","title":"Johns Manville DynaGrip SD\/SA Polyester-Reinforced Base Sheet, 39-3\/8 in. x 49 ft. 2 in., Black","description":"\u003ch1\u003eJohns Manville DynaGrip SD\/SA Polyester-Reinforced Base Sheet, 39-3\/8 in. x 49 ft. 2 in., Black\u003c\/h1\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eJM 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.\u003c\/strong\u003e\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eKey Features:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelf-adhering backing:\u003c\/strong\u003e An easy-to-peel plastic film on the bottom of the sheet permits installation without hot asphalt or heat welding.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile cap attachment:\u003c\/strong\u003e Allows installation of a cap sheet with hot asphalt, an approved cold adhesive, or heat welding techniques.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElastic recovery:\u003c\/strong\u003e Provides full recovery properties after 100% elongation, lending elasticity and flexibility to the sheet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensional stability:\u003c\/strong\u003e Offers excellent dimensional stability and tensile strength and withstands differential movement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePolyester reinforcement:\u003c\/strong\u003e Polyester-reinforced construction supports durability in modified bitumen roof assemblies.\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003ch2\u003eSpecifications Table:\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eDetails\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eJohns Manville\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSell unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 roll, 39-3\/8 in. x 49 ft. 2 in.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct line\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eJM DynaGrip Base SD\/SA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAvailable colors\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAvailable sizes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e39-3\/8 in. x 49 ft. 2 in.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eModified bitumen base sheet, polyester reinforced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor \/ finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e39-3\/8 in. x 49 ft. 2 in.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIntended use\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSelf-adhering base sheet for BUR and modified bitumen roof systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplication methods\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSelf-adhered (peel and stick); accepts cap sheet via hot asphalt, cold adhesive, or heat welding\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003chr\u003e\u003ch2\u003eCoverage \u0026amp; How Much You Need:\u003c\/h2\u003e\u003cp\u003eOne 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.\u003c\/p\u003e\u003ch2\u003eFit and Compatibility:\u003c\/h2\u003e\u003cp\u003ePart 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.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eFrequently Asked Questions (FAQ):\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eQ: What comes in one order unit?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e One roll of JM DynaGrip SD\/SA Base Sheet, 39-3\/8 in. x 49 ft. 2 in., black, polyester reinforced.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: Can I install this without a torch or mop?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. The self-adhering underside with an easy-to-peel plastic film allows installation without hot asphalt or heat welding.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: What cap sheet attachment methods work over this base sheet?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e A cap sheet can be installed with hot asphalt, an approved cold adhesive, or heat welding techniques.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: How much roof does a roll cover?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Each roll measures about 39-3\/8 in. by 49 ft. 2 in., or roughly 160 sq ft before lap allowances.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: What makes the sheet flexible?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The sheet provides full recovery after 100% elongation and offers excellent dimensional stability and tensile strength, withstanding differential movement.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eExpert Verdict — Reviewed by the SuperArbor Pro Desk\u003c\/h2\u003e\u003cp\u003eSelf-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.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eFollow the manufacturer's application requirements for substrate preparation and membrane compatibility, and observe roof-safety and fall-protection practices during installation.\u003c\/em\u003e\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eOrder JM DynaGrip SD\/SA Base Sheet for a self-adhered foundation on your next modified bitumen roof.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Johns Manville","offers":[{"title":"Default Title","offer_id":67583396479343,"sku":"JM90029379","price":131.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0830\/3499\/7051\/files\/JM90029379_0.jpg?v=1790407071","url":"https:\/\/superarbor.io\/products\/johns-manville-dynagrip-sd-sa-polyester-reinforced-base-sheet-39-3-8-in-x-49-ft-2-in-black","provider":"Super Arbor","version":"1.0","type":"link"}