DeckSeal SA Base/Ply FR membranes have a polyolefin film with lay lines printed on the top surface for simplified measuring and a split release film on the bottom surface for ease of application. DeckSeal SA Base/Ply membranes are premium, fire resistant self-adhered elastomeric base ply roofing products. These products are manufactured using a Dual Compound Self-Adhesive technology. DeckSeal membranes are built on a high performance reinforced fiberglass mat for excellent dimensional stability. The SBS polymer modified asphalt compound on the top layer is formulated for durability and performance. An aggressive self-adhesive compound is applied on the bottom layer for strong adhesion to the prescribed substrate layer and for application friendliness.