POWERply® SA Base Sheet:

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.

Roofing & Weatherproofing Peace of Mind

We deliver peace of mind to building owners and facility managers by managing roofing and building life cycles for customers in all industries, including education, healthcare, government, manufacturing and more.

  • Tremco Roofing offers the industry's most comprehensive roofing and weatherproofing solutions for restoration, repair, maintenance, replacement and new construction.
  • WTI (Weatherproofing Technologies, Inc., a subsidiary of Tremco Incorporated), provides roofing services, construction management and general contracting.
  • Our Canam Building Envelope Specialists affiliate provides building envelope solutions to eliminate air leaks, improve energy efficiency and reduce costs.


US: 1.800.852.6013

Canada: 1.800.668.9879

Email: info@TremcoRoofing.com