Flex Seal Max liquid rubber coating spray that turns into a durable waterproof barrier. It's easy to use and comes in a portable aerosol spray can. Flex Seal sprays out as a liquid, seeping into cracks and holes, and then dries to a rubberized coating. Flex Seal stops vibrations and deadens noise. Flex Seal seals out water, air, moisture, preventing rust and corrosion. Flex Seal Max 17-fl oz White Aerosol Spray Waterproof Rubberized Coating | FSMAXWHT24