Urethane based. Nontoxic, nonflammable/noncombustible. Gives off no fumes and is environmentally safer than other conventional adhesives. Securely bonds and is compatible with all building materials. Bonds can be made in temperatures ranging from 0 F. to 400 F. Material may be repositioned up to 1 hour without losing strength. Tested 3 times stronger than conventional adhesives and provides twice as much coverage as conventional adhesives. May be used inside or outside. 10 to 12 hour cure time. Exceeds VOC compliance regulations, exceeds glued subfloor and construction code AFGl 01, FHA bulletin UM 60, ASTMC557, and ASTM3498. Workable yield of adhesive per 10.2 oz. cartridge is 30".