Rust Shield is a heavy duty corrosion preventative coating formulated to comply with AS2662, Part 1 - 1983 - Corrosion inhibition (Rust Proofing) - Motor Vehicles. It is a heavy bodied, waterproof, anti-corrosive, noise suppressing black compound fortified with bitumen, waxes and corrosion preventatives that produces very good seam penetration with negligible sag and run when applied by spray through a body deadener gun. Once dry it forms a durable, flexible coating with a stippled surface finish that provides excellent resistance against stone chip damage.