Selleys Rp7 Is a Multi-purpose Lubricating and Penetrating SprayWhich Displaces Water and Inhibits Corrosion. Rp7 Contains aPenetrating Lubricant Oil That Stops Squeaks and Loosens RustedParts.rp7 Displaces Moisture.rp7 Protects All Metals by Providing aProtective Barrier Against Corrosive Environments, Including SaltWater and Many Chemicals.rp7 Will Not Adversely Affect Rubber,Paintwork or Most Plastics.