The Birchwood Casey Barricade Rust Preventive Aerosol protects your firearms from rust, rapidly driving out moisture from metal pores and depositing a transparent coating which seals the surface with a protective film. Withstands 500 hours in ASTM humidity test and 96 hours in ASTM salt spray test. Barricade Rust Preventive is also an excellent penetrant for loosening rusty or frozen parts, as well as a good lubricant and an effective bore cleaner. Contains FPR to wipe off corrosive fingerprints on all your firearms. Protects from rust Withstands 500 hours in ASTM humidity test Excellent for loosening rusty or frozen parts Good lubricant and effective bore cleaner