Product Description Gorilla Glue is the original & best product, which built a name for itself with its incredible, industrial holding power and versatility. It's safe for indoor and outdoor use and strong enough to stand up to intense heat or cold. Water activated, it expands into materials to form an incredibly strong bond to virtually anything. As your solution for almost any project or repair, Gorilla Glue is 100% waterproof, weatherproof, you-name-it-proof. Sand it, paint it, stain it. Simply stated, it s the Toughest Glue on Planet Earth.