Flex Seal is an easy-to-use rubberized coating that sprays out as a liquid, seeps into cracks and holes and dries to a watertight, flexible coating. Flex Seal seals out water, air and moisture and helps prevent rust and corrosion. Once dry, Flex Seal can be painted over. Stops leaks fast. Easy to use, portable, aerosol spray Seeps into cracks and holes Dries to a watertight, flexible, rubberized coating Use on wet or dry surfaces Stays flexible and pliable, lasts for years Will not sag or drip in summer heat Will not crack or peel in winter cold Stops vibrations and deadens noise Protects surface from corrosion Once completely dry, it can be painted any color Use also on aluminum, porcelain, drywall, and cement