CRC 5-56 Marine is a multi-purpose oil designed to prevent damage due to water and salt atmosphere in marine engines and boating equipment. It forms a thin film that lubricates moving parts for smooth action and protects metals from corrosion caused by humidity and salt air for extended periods. Superior penetrating power breaks through rust and corrosion, loosens rusted parts and keeps them free, displaces moisture out of ignition systems to help start wet engines. CRC 5-56 Marine increases life span, decreases maintenance and assures improved performance of all marine inboard or outboard motors. It is safe for all metals and alloys and on most painted surfaces, coatings, plastics and rubbers.