CertainTeed's Flintlastic® SA MidPly is the premium self-adhered base or interply used within Flintlastic® SA, fully self-adhered low-slope roof systems, when extended warranties are desired. Flintlastic® SA MidPly may also be used in a hybrid system with a torch-applied cap sheet. This 110-mill membrane is manufactured with heavy-duty glass reinforcement saturated and coated with SBS-modified bitumen, offering exceptional durability. The proprietary top surface film promotes immediate and long-term adhesion to Flintlastic® SA self-adhered membranes. Flintlastic® SA MidPly may be directly adhered to any approved low-slope roofing substrate. Flintlastic® SA offers S.A.F.E roofing - Speed, Affordability, Fume & Flame Free, and Easy to Learn. SPEED. CertainTeed commissioned a third party comparison of labor efficiencies across multiple popular low-slope roof systems including multi-layer modified bitumen and single-ply systems. A two or three ply Flintlastic® SA system instal...See Moreled faster than traditional modified application methods and single ply. Watch the side-by-side time trial. AFFORDABILITY. While material costs associated with multi-ply modified bitumen roof systems can be greater than single-ply, once labor savings are factored in, installed costs are comparable. Multi-ply protection is superior. FUME & FLAME FREE. Leave your kettles and torches behind - Flintlastic® SA roof systems requires only a weighted roller to achieve a comparable bond to traditional mod-bit installation methods. Include FlintPrime®, for priming as needed, and FlintBond® for detail work. EASY TO LEARN. CertainTeed's Credentialed Contractors report faster skill acquisition for Flintlastic® SA self-adhered installation compared to other application methods - touting six months to one year for crew leadership. Reach out to your local CertainTeed Territory Manager to request a sample of Flintlastic® SA MidPly and training on the Flintlastic® SA self-adhered roof system. See Less