Product Description The product that started it all. Famous for its incredible strength and versatility, Original Gorilla Glue is 100% waterproof and resistant to extreme temperatures. The water activated polyurethane formula expands into materials to form an incredibly strong bond to virtually anything, making Gorilla Glue your solution for almost any project or repair. 100% Waterproof. Won’t break down when exposed to moisture. Bonds Dissimilar Materials. Stone, metal, ceramic, glass, wood, foam brick and more! Incredibly Strong, expanding 3 times into the materials to form an incredibly strong bond. Temperature Resistant. Not affected by extreme heat or cold. Paintable, Stainable & Sandable, making for an easy finish, Gorilla Glue is sandable, stainable and paintable. Once fully cured, Gorilla Glue can be sanded and then painted or sprayed with oil-based paint.