Selleys RP7 is a multi-purpose lubricating and penetrating spray which displaces water and inhibits corrosion RP7 contains a penetrating lubricant oil that stops squeaks and loosens rusted parts. RP7 displaces moisture. RP7 protects all metals by providing a protective barrier against corrosive environments, including salt water and many chemicals. RP7 will not adversely affect rubber, paintwork or most plastics