Permaroof GWS:

Permaroof GWS

Versatile Sealant for Use on BUR and MB Roofs; Joints; Concrete and Metal

Permaroof GWS is a versatile sealant that repairs cracks, splits, and fractures in BUR and MB roof membranes in a single layer application without the need for additional reinforcing fabrics.   This fast, labor saving way to prevent moisture intrusion can also be used on joints and on concrete and metal surfaces, in combination with the recommended Tremco silicone sealant primers.   


Permaroof GWS is a moisture cure, one part gun grade silicone sealant with self-leveling characteristics.  

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