Glasfab® and Glascoat® Woven Glass Fabrics Glasfab® and Glascoat® Woven Glass Fabrics are both well-known and widely accepted in the construction industry. Glasfab, an asphalt coated fabric, and Glascoat, a white resin-coated fabric are inorganic woven glass membranes which will not rot, are lightweight and will conform to irregular surfaces. The tensile strength of glass fabrics is greater than cotton fabric or jute.  Return to Reinforcement Fabrics