Sta-Plug is a soft, cone-shaped plug designed to conform to the irregular and unpredictable shapes of a hull breach. Whether it's a round hole caused by mechanical failure, or an elongated tear due to impact, the plug adapts to slow or stop the leak. Unlike old wooden plugs, Sta-Plug's unique shape allows it to be compressed by hand or cut to fit. It also gets into hard-to-reach locations and can also be pushed into a gap using a screwdriver or similar tool. It is the true stop-gap solution for emergency leaks. It is recommended to have 1 Sta-Plug for each 10' of boat length. Usable in 10°F to 275°F temperatures. Note: Plug is not designed for fuel leaks.