Stay Afloat Marine Instant Leak Plug Sealant - 14oz [SA-0214]Instant Leak Plug & Sealant 14oz Stay Afloat is an instant leak plug and sealant. It is a simple and versatile material intended to be used to stop or slow water leaks. Used alone, it requires no mixing, measuring, or curing. It is easily molded and applied by hand into holes, gaps, and cracks. Applied in sufficient quantity, it can stop or slow many types of leaks, and when combined with other material(s), such as wood or plastic, it can stop or slow