Improved formula. Frees stuck nuts, bolts and locks. Dissolves rust, cuts through grease. Quickly penetrates corrosion. Provides optimal penetration. Reduces friction. Prevents wear. Low odor, low VOCs. Does not stain painted surfaces. Use on: nuts, bolts & hinges; clamps & pipes; locks & latches; frozen mechanisms; garden hose nozzles. Liquid Wrench powerful Penetrating Oil with cerflon is a fast-acting, anti-seize formula that penetrates corrosion, loosens rusted bolts and parts. Contains no CFCs which deplete the ozone layer. Made in USA.