Radiator Specialty Co.'s Liquid Wrench Penetrating Oil, Nos. L106 and L112, dissolves rust and cuts through grease to frees stuck nuts, bolts and locks. Quickly penetrates corrosion on contact while being safe for use on painted surfaces. Intended for use on applications where rust or corrosion prevents a fastener from being removed. Benefits from being low odor, low VOCs and not causing stains.