Check the listing for details. Fluid Film AS11B Undercoating Protection Rust Inhibitor Spray Can Black, 2 Pack. Condition: New. Listed at 31.95 USD. Fluid Film AS11B Undercoating Protection Rust Inhibitor Spray Can Black, 2 Pack FLUID FILM BLACK offer powerful corrosion protection for all metals and superior lubrication for moving parts. The long lasting thixotropic liquids and gels is aptly used in the highly corrosive marine environment, aviation, automotive, equipment/plant and farming industriesWIDELY USED at home and in government and commercial facilities for maintenance of locks & hinges at home, lawn & garden tools & equipment. Savaging damaged, heavily corroded and/or frozen parts such as nuts, bolts, shafts, etc.HOW IT WORKS. The wet barrier creeps and migrates into tight seams and into the metal chassis to provide corrosion protection from salts and brines. Protects your vehicle while restoring a rich black color to the chassis or cover existing rustNO SOLVENT. Formulated from specially processed wool-wax, highly refined petroleum oils and selected agents, providing a non-toxic, non-irritating, non-flammable coating for corrosion control, penetration, metal wetting and water displacement