The Gorilla® clear glue is activated by water and expands its volume three to four times. The glue is heavy-duty, 100% waterproof, and can be used indoor and out, with a clamp time of 60 minutes. It is paintable, stainable and sandable. Suitable for use on wood, stone, metal, ceramic, foam and glass. Only a few drops are needed. 51 mL container.