Original Gorilla Glue built a name for itself with its incredible, industrial holding power and versatility. Water activated, it expands into materials to form an incredibly strong bond to virtually anything. Gorilla Glue is your solution for almost any project or repair. It’s 100% waterproof, safe for indoor and outdoor use and strong enough to stand up to the elements. Plus, its expansion allows it to penetrate the glued surface for a superior bond. Sand it, paint it, stain it. Simply stated, it’s the Toughest Glue on Planet Earth.