6 Per Pack CRC 5-56 Marine is a multi-purpose lubricant designed to prevent damage due to water and salt atmosphere in marine engines and boating equipment. CRC 5-56 Marine increases life span, decreases maintenance and assures improved performance of all marine inboard or outboard motors. It forms a film that protects metals from corrosion caused by humidity and salt air for extended periods and lubricates moving parts for smooth action.