T-Rex Ferociously Strong Waterproof Tape provides tough waterproof adhesion under wet and dry conditions. It's strong enough to be used for general purpose indoor or outdoor fixes that require a waterproof seal, like repairing a rip in an above-ground pool or temporarily stopping a leak in a water pipe. Or, apply it underwater and push it into cracks and rough, dirty surfaces. T-Rex Waterproof Tape. Flexibile, ferociously strong, and waterproof like no other.