Video answer: Gorilla glue - worlds best waterproof glue
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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.
Video answer: Waterproof patch and seal tape test.