Motospray Cavity Rust Inhibitor is a heavy duty, rust and corrosion preventive wax coating, designed for use on concealed internal surfaces of cars, trucks, trailers, caravans, 4WDs, tractors, farm machinery, equipment and tools. Inhibits the formation of rust inside internal box sections, chassis, door cavities, sills, side panels and pillars. Dries to a flexible, non sticky film that is water repellent. Formulated to AS2662