Look how wide it is! Our Flex Super Wide Duct Tape is up to 300% wider than ordinary 1.88 duct tape. From sealing heavy boxes to repairing duct work, you can trust our Flex SWDT to hold on tight. Its backing is designed to take a beating. A powerful, thick rubber adhesive allows our Flex Super Wide Duct Tape to hold an amazing amount of weight and tension—even a 500lb safe! Flex Super Wide Duct Tape is water, weather, and UV resistant. Indoor or out, it was built to perform.