Kroil Original Penetrating Oil is an industrial-strength formula designed to quickly loosen rusted, corroded, or frozen metal parts. Packaged in a convenient 16.5 oz aerosol can and sold in a 3-pack, it penetrates deep into the smallest gaps to break the bond of rust and corrosion, making disassembly faster and easier. Trusted by professionals since 1939, Kroil is effective on rusted bolts, metal fittings, bike and motorcycle chains, garage door rollers, door hinges, and other moving parts. Its advanced formula creeps into tight spaces, displaces moisture, and leaves a thin protective layer to help prevent future rust. Ideal for automotive, industrial, marine, and maintenance applications, it works where ordinary penetrants fail, saving time and reducing the risk of damaging components.