Mighty Sealer is a flexible rubber coated sealant available in a spray can for instant use. It's great for sealing cracks and leaks in walls, gutters, and pipes. MIGHTY SEALER forms a watertight barrier on all surfaces to arrest seepage. This rubber sealer can be used in showers, faucets, plumbing, cement work, grout, granite countertops, gutters, windows, pipes, boat vinyl siding, rooftops, metal, rubber, damaged trees, etc.