Silverhook Bitumastic Under Seal is ideal for use under vehicle chassis, wheel arches, door sills, fuel tanks and other high impact areas giving a tough, flexible, anti-chip, anti-corrosive coating. Under Seal will provide a durable high impact protective coating against corrosion, water, stones & salt. It also finds many uses in a wide range of building applications, where its waterproof properties are particularly important, e.g. repairs to felt roofs, guttering, and general damp proofing.