Strong waterproof tape provides tough waterproof adhesion under wet and dry conditions. Built with R-Flex Technology , T-REX waterproof tape can stretch up to 700% of its original length. 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. Apply it underwater and push it into cracks and rough, dirty surfaces. Formulated to withstand extreme temperatures from -70F to 200F, its UV-resistant formulation won't break down under harsh sunlight. Grade: Medium-Duty; Core Size: 3"; Dispenser Included: No; Adhesive Material: Butyl.