CertainTeed's premium smooth, torch-applied, APP-modified bitumen cap sheet, Flintlastic® STA Plus is valued for its thickness, quick melt and decades of consistent quality. This 177-mil membrane is manufactured with more polymer-modified asphalt than it's "younger brother" Flintlastic® STA, and stress-resisted polyester reinforcement, offering exceptional durability. STA Plus offers some application forgiveness compared with its granulated counterpart, GTA, with a precise selvage edge and lap line. Coat Flintlastic® STA Plus with SMARTCOAT reflective roof coatings for Integrity Roof System Limited Warranties. Torch-down roofing technology has only strengthened since first coming on the scene in the 1970’s. CertainTeed modifies roofing asphalt with plasticizing atactic polypropylene (APP) polymers to enhance product toughness, especially in environments with elevated UV exposure. These APP modified bitumen products are staples of the torch roofing community, e...See Morespecially in the West and South. Ask any experienced roofing contractor, and they will tell you that a properly installed, high-quality torch system creates a multi-layered barrier that will protect a building for decades to come. Reach out to your local CertainTeed Territory Manager to request a sample and demonstration of Flintlastic® STA Plus. See Less