POWERply® SA Base Sheet
A Self Adhesive, SBS Modified Bitumen Base Sheet/Underlayment
The POWERply SA Base Sheet is used as a base ply in a self- adhered modified bitumen membrane roof system. In addition, this product may be used as a backing sheet to properly prepared surfaces in a flashing installation. The POWERply SA Base Sheet may be specified as a component in a variety of roofing and waterproofing applications, such as a base ply under metal roof systems, under lightweight insulating concrete, and as a foundation waterproofing membrane.
POWERply SA Base Sheet is a self-adhesive SBS Modified Bitumen base sheet. It consists of specially blended SBS modified asphalt above the fiberglass mat, with an SIS modified self adhesive bitumen blend below the fiberglass reinforcement. The bottom of POWERply SA Base Sheet includes a perforated and split-release film to allow for easier handling during installation. POWERply SA Base Sheet is surfaced with a polyolephin film which provides an excellent substrate for self-adhering SBS modified bitumen membranes over the top. POWERply SA Base Sheet meets the requirements of ASTM D 6163, Type I, Grade S.