Penetrates to displace moisture. Lubricates and neutralizes sweat and salt and prevents rusty fingerprints from appearing on your favorite airgun. MP-5 penetrates into the smallest crevices and finally dries to a thin, non-gumming, lubricating film which last through almost indefinite storage. Harmless to steel, non-ferrous metals, woods, air gun seals and leather. Do not use in compression or spring chambers.