Metcore 57 Gun Boar Cleaner instantly cleans firearm bores to a “mirror finish” without creating a mess, noxious odors or excessive residue build-up. In just one application, this product cleans, lubricates, and protects your firearm’s bore and any other metal surface it contacts. This unique formulation dries instantly sealing the bore’s metal surface from moisture and humidity for long-term indoor storage.