As of 2015, Flex Seal rubberized paint is not available at Home Depot, but is available at Amazon.com, Wal-Mart and Lowe's. It is also available on the manufacturer's website at GetFlexSeal.com.
Flex Seal is a spray-on sealant that creates a flexible waterproof coating when dried. The product dries to the touch in about three hours and fully cures in around 24 hours, depending on humidity, temperature and thickness of application. The product is suitable for both dry or wet items to provide protection to concrete, metal, masonry, plastic, porcelain and other surfaces. Flex Seal products are available in 10 colors and clear.