Special formulation for use with high compression CO2 gas and pneumatic guns, moving parts and pump actions. Cleans, lubricates and protects metal. Special formulation improves performance on a well-used airgun. See operating instructions in your manual before using. For CO2 guns Crosman recommends a drop on the tip of every third AirSorce (88 gram) cartridge to oil the seals inside the gun. If you do that, your gun will hold gas for years and years.