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Kroil Penetrant with Silicone. Best Penetrating Oil.

Free it up, lube it up, finish it up. No job is too tough for Kroil Penetrant with Silicone (formerly SiliKroil).

Best Penetrating Oil With Silicone

Kroil Penetrant with Silicone (formerly SiliKroil) has been engineered to loosen frozen metal parts and provide extra lubrication for long-lasting protection. The addition of silicone to the legendary Kroil formula results in superior penetration, lubrication and rust prevention. This high solvency oil first penetrates into the tightest of spaces to break the bond of rust, and then provides lubrication at the first molecular level, subsequently freeing virtually any metal part. Kroil Penetrant with Silicone is designed for use on frozen bearings, slides, gate valves, hinges, chains, and more. Excellent for use in coastal areas or anyplace where exposure to salt and weather is a factor.

Available In

Aerosol: 10oz, 16.5oz
Liquid: 1gal, 5gal, 55gal

Lubricates Longer

Dimethyl silicone provides extra long-lasting lubrication and rust protection

Attacks Corrosion

Frees bolts, fasteners and other mechanical components

Penetrates Deeper

Penetrates deeply into frozen metal parts and supplies added lubrication

Removes Rust and Carbon Deposits

Will not attack or damage metal

Works Everywhere

Use on any corroded threads or tight parts

Simplifies Repairs

Makes the toughest maintenance jobs easier, faster and safer to execute
  • Agriculture
  • Automotive
  • Aviation
  • Construction
  • Electrical
  • Facilities Maintenance
  • Factories
  • Firearms
  • First Responders
  • HVAC
  • Industrial
  • Infrastructure
  • Lumber
  • Manufacturing
  • Maritime
  • Mechanical
  • Metal Fabrication
  • Military
  • Mining
  • Oil & Gas
  • Plumbing
  • Utilities
  • Transportation
  • Utilities
  • Agricultural equipment
  • Automobiles
  • Bearings and bearing mounts
  • Boats and marine equipment
  • Bushings
  • Castors
  • Chains and track pins
  • Construction equipment
  • Conveyors
  • Corroded fasteners
  • Drilling equipment
  • Engines and engine parts
  • Equipment disassembly
  • Firearms
  • Frozen gears and cogs
  • Frozen nuts and bolts
  • Gearboxes
  • Heat exchangers
  • Hinges and pins
  • Hitches
  • Locks
  • Lugs and lug nuts
  • Pillow blocks
  • Piping
  • Plumbing fixtures
  • Printing presses
  • Pulleys
  • Pumps
  • Rivet guns
  • Saws
  • Screws
  • Shafts
  • Sliding mechanisms
  • Sporting equipment
  • Turbines
  • Valves
  • Washers
  • Winches and cranes

Maintenance Tips

Get Some Air

A large airplane factory reported having trouble with air-driven rivet guns, which slowed down production. The maintenance team applied Kroil Penetrant with Silicone (formerly SiliKroil) to the air-driven equipment, and voilà, the production line was flying again.

Hitches, Please

Trailer hitches don’t usually get much love. They’re often left out in the elements for long periods of time. When hitches lock up or get rusty, spray them with Kroil Penetrant with Silicone to loosen and lubricate for lasting use.

Chain Gang

Apply a top-coat of Kroil Penetrant with Silicone for additional cleaning and long-lasting lubrication, after loosening rusted chain mechanisms with Kroil Original Penetrant.


“It does the job so well; it pays for itself.”

Plant Manager, Major Manufacturer

“Like magic, the lubrication penetrates the toughest bolts.”

Amazon Reviewer

“If I see a can of Kroil in a shop, I know they know what they’re doing.”

Master Automotive Equipment Technician, Telecom Company


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