With Crc Rust Off ind penetrating oil, you quickly free seized, rusted, and corroded fasteners. The formula penetrates deeply into tight tolerances and rust layers, allowing you to loosen stubborn bolts and nuts without damaging the threads. Thanks to the added MOS2 solid lubricant, it leaves behind a protective lubricating layer that minimizes friction and prevents re-seizing and further corrosion. The convenient 250 ml aerosol can allows you to apply the oil precisely to moving mechanical parts, hinges, and machinery in the workshop or garage.