SA Universal Base Sheet is a SelfAdhering Base/Ply Sheet that allows attachment to its top surface with hot asphalt, cold adhesive, torchdown asphalt, and Low Rise Foam (LRF). This versatile base sheet is reinforced with a glass mat, which provides outstanding strength and water resistance. The SA Universal Base Sheet product is designed for use as a base membrane for approved GAF asphalt and single-ply roof systems.