Kroil Original Penetrant. Best Penetrating Oil.
Loosen frozen metal parts the professional way, with Kroil Original Penetrant in liquid and aerosol (formerly AeroKroil) formulas. Discover why this is the best penetrating oil to loosen bolts in various applications.
Best Penetrating Oil Used by the Pros
When it comes to freeing corroded items in tough spaces, nothing rivals powerful, industry-proven Kroil penetrating oil. Used and trusted by pros and experienced DIYers alike since 1939, Kroil quickly loosens rusted nuts and bolts, frees frozen shafts, pulleys, and more. No space is too tight to reach, thanks to Kroil’s ability to penetrate the smallest opening, thread or crevice. Corrosion meets its match, as Kroil removes and prevents rust, cleans and lubricates, and displaces moisture.
Removes Rust and Carbon Deposits
- Facilities Maintenance
- First Responders
- Metal Fabrication
- Oil & Gas
- Agricultural equipment
- Bearings and bearing mounts
- Boats and marine equipment
- Chains and track pins
- Construction equipment
- Corroded fasteners
- Drilling equipment
- Engines and engine parts
- Equipment disassembly
- Frozen gears and cogs
- Frozen nuts and bolts
- Heat exchangers
- Hinges and pins
- Lugs and lug nuts
- Pillow blocks
- Plumbing fixtures
- Printing presses
- Rivet guns
- Sliding mechanisms
- Sporting equipment
- Winches and cranes
Out to Sea
The Sporting Life
“Kroil has been the most impressive penetrating oil…I would never not have Kroil on hand for the toughest jobs.”
“I don’t really care how much the stuff costs…a couple of squirts of Kroil just doesn’t cost that much compared to the cost of the job.”
“Kroil is the penetrating oil that I swear by. If you use it on a seized part, it is guaranteed to come apart.”
Got a minute? Watch how Kroil has established its place in the world.
On The Job With Western Allied Mechanical
Watch how a leading commercial HVAC contractor uses Kroil to help keep their clients cool and comfortable.
Kroil Maintenance Applications: Maritime
Kroil Maintenance Applications: Oil & Gas
Thanks for noticing our great new look! While you will soon be seeing new Kroil packaging on the market, the same great products are still inside the cans. The formula hasn’t changed.
(New packaging coming Summer 2021.)
Both products have similar penetrating properties, and can be used in multiple applications. The biggest difference between the two is the lasting lubricating effect of silicone in Kroil Penetrant with Silicone (formerly known as SiliKroil). In addition to lubrication, silicone helps to displace moisture, which adds an extra element of protection.
Yup, the exact same product is in all Kroil Original Penetrant liquid and aerosol cans.
If there is already current damage to the blued finish, Kroil penetrants can possibly creep under and lift the finish from the gun/rifle. In the event of overspray, simply wipe excess Kroil off the affected area(s) with a clean dry cloth.
Please visit our where to buy page on this website for purchasing instructions.
We sure can, please call us at 800-311-3374.
Yes, Kroil products are safe and effective on all metals.
Yes, Kroil products are available to Amazon Business members only, at this time. If you are not an Amazon Business member, we encourage you to shop from a Kroil distributor in your area. Visit our where to buy page for a full listing, and check back often, as new distributors are frequently added.