Gorilla Glue Polyurethane Glue Gorilla Glue is the product that started it all. The glue is America's favorite because it works where other glues fail. With its incredible durability and versatility, Gorilla Glue has become the obvious choice for anyone who wants the job done right the first time. Gorilla Glue is 100% waterproof, withstands both high and low temperatures, weather, wind and anything else you can imagine. It glues stone, metal, ceramics, glass, wood and much more. The water-activated polyurethane formula expands into the material and forms an incredibly strong adhesion. Once stuck, it never lets go. Once the adhesive is fully cured, it can be both sanded and painted over.