Kroil® Original Penetrating Oil – Liquid (8oz to 15 Gallon)

Kroil® Original Penetrating Oil – Liquid (8oz to 15 Gallon)

The original “Oil That Creeps” since 1939.

Kroil® Original Penetrating Oil in liquid form creeps into the tightest tolerances to break the bond of rust, carbon, and corrosion—freeing seized fasteners and components fast. It also cleans, lubricates, displaces moisture, and helps prevent future rust so repairs go smoother and equipment gets back to work.

• Deep penetration: Reaches one-millionth-inch spaces to loosen rusted nuts, bolts, and fittings.
• Cleans & protects: Dissolves gum, dried grease, and carbon; displaces moisture to resist corrosion.
• Professional results: Trusted by MRO, automotive, marine, and industrial technicians.
• NSF Listed H2: Nonfood Compounds Program, Reg. #165745 (8oz & gallons).
• 50-state VOC compliant: Made in the USA.
• Sizes: 8oz, 1 Gallon, 5 Gallon, 15 Gallon.

Kroil® Original delivers proven penetration where conventional oils stall. Apply a few drops or flood the area, allow capillary action to work, then break free even stubborn, corroded assemblies. Ideal for shop rebuilds, field service, fleet maintenance, and general repair—anywhere fasteners seize or precision parts need gentle persuasion without damage.

Technical Specifications

• Composition: Penetrating oil and solvents designed for capillary creep and corrosion removal.
• Functions: Penetrates, loosens, lubricates, cleans, displaces moisture, helps prevent rust.
• Certifications: NSF Nonfood Compounds H2 (8oz & gallons), Reg. #165745.
• Compliance: 50-state VOC compliant; made in the USA.
• Packaging: 8oz bottle; 1, 5, and 15 gallon containers.

Prefer aerosols? See Kroil® Original Penetrating Oil – Aerosol (AeroKroil®) in 10oz, 13oz, 16.5oz, and 3oz sizes.

Need bulk? Our Kroil® Original – 55 Gallon Drum supports high-volume maintenance programs.

Note: 15 Gallon containers may ship directly from the manufacturer.