High modulus, 100% RTV silicone, designed for glazing and sealing glass, plastic or metal. For use with many applications involving non-porous building materials. Forms a permanent watertight and weatherproof bond to materials like glass, ceramics, aluminum, primed steel, and most plastics. Cures at room temperature in 24 hours. Withstands temperatures -60 to 400 degrees Fahrenheit without adverse side effects. Resists ultraviolet light and other harsh environmental elements. +/- 25% movement capability.With twist-off nozzle for interchangeable 3" or 4" spout. Meets Federal Spec. TT-S-00230C, Type II, Class B; TT-S-001543A, Class B; ASTM C920-86, Type S, Grade NS, Class 25, Use NT; CAN/CSGB-19. 13-M87; CAN/CSGB-19 M87; FDA-USDA Approved.