According to the commercial for Flex Tape, it's so strong it can plug a hole underwater, lift a 45-pound weight and even patch up a boat that has been sawed in half. But is it all just advertising hype? Inside Edition's Chief Investigative Correspondent Lisa Guerrero bought a boat and cut it in half, just like the commercial, to see if Flex Tape could help it work on the water. A team at Lakeview Marina in New Jersey applied the tape after the boat was cut in half.