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Gets in Tight Spaces
Kroil penetrating lubricants penetrate tight spaces and small openings to loosen stuck threads.
Our new SprayTech nozzle allows you to use every drop and reach any angle
- Penetrates Quickly
- Attacks Corrosion
- Helps Remove Rust and Carbon Deposits
- Simplifies Repairs
- SprayTech 360 Uses Every Drop in the Bottle
- SprayTech 360 Allows You to Reach From Any Angle
Industrial Strength Penetrating Oil
Quickly Loosens Rusted Nuts and Bolts
Loosen frozen metal parts the professional way, with Kroil Original Penetrant in liquid and aerosol (formerly AeroKroil) formulas. Discover why Kroil has been trusted to help loosen bolts in various applications since 1939.
- Rusted Bolts
- Rusted Metal
- Bike Chains
- Motorcycle Chains
- Garage Door Rollers
- Door Hinges
- Moving Parts
Quickly Penetrates Threads and Crevices
Tight spaces are no problem, because Kroil penetrates threads or crevices to break down rust and unstick seized bolts. So, whether you’re lubricating dirt bike motorcycle chains, rusty old door hinges, or stubborn garage door rollers, Kroil isn’t afraid to get in tight spots and get dirty.
Magnifies Muscle
When tackling the toughest nuts and bolts, any additional leverage helps. Kroil loosens tough rusted parts quickly, requiring less torque to loosen. Now that’s leverage!
Attacks Corrosion
Corrosion meets its match, as Kroil removes and prevents rust, cleans carbon deposits and lubricates rusty parts.
Any Angle, Every Drop with SprayTech Nozzle
Our new SprayTech 360 degree nozzle allows you to reach from any angle and use every drop in the can.
julius p allmann
Reviewed in the United States on February 5, 2025
This aerosol oil spray has a very nastyOdor!!!!!! It’s taken me 5 days to get rid of most of the smell. I’m not saying that it’s a bad product it does work but as an aerosol it smells awful.The liquid in a squirt can doesn’t stink as bad as the aerosol spray can.This aerosol oil should ONLY BE USED OUTSIDE,not in your shop,garage or any structure that is attached to your home.The odor will find a way in trust me .consumer beware!
Apebrains
Reviewed in the United States on February 13, 2025
Without exception, the best penetrating lubricant (stop it) out there, and I have used a LOT of them. Not only is the product itself fantastic, but this delivery container with the multiple spray options makes this a permanent fixture in my tool kit. This stuff even...kind of...smells nice. Even my wife admits this. It's strange.Can be hard to find locally, so this is as good a place as any to pick it up. Anyway, short and sweet review, nothing else to say but this: it's not going to break a frozen bolt on its own, but if penetrating lube (stop it) has any hope of breaking it free, this will be the one to do it. Buy with confidence.
glen
Reviewed in the United States on February 10, 2025
The only one i will buy now. Penetrating best and as a farmer its best ive ever used. Also doesn't attract dirt. Even used on 5th wheel slideouts.
Yagermeister
Reviewed in the United States on January 28, 2025
Probably just me, however, Kroil has been the best lubricant, penetrant that I have used in my professional and personal life. Pricey, but I don’t waste my money on the other wannabes. Used spatially over the years because access was limited outside of work.
DPuls
Reviewed in the United States on January 25, 2025
Product works great as it should at the premium price. Can came packaged loose in a very oversized box. The spray cap had come off but I'm able to use it although I have to be very careful and sometimes hold the cap on with free hand. One star off for the miserable packaging.
Mr P
Reviewed in the United States on December 10, 2024
This is a quality penetrating oil that really works well loosening and removing rusted hardware. Comes out of can fast with large volume so be careful but straw will spray in any direction which is helpful for hard to teach areas.
John Q. Public
Reviewed in the United States on November 12, 2024
Kroil, Is well known by mechanics, Gunsmiths, and other people that may have to work with rust or frozen screws, nuts and bolts. The oil is also available in a can, but the oil creeps so well that eventually it will creep out of the seam of the can so the can needs to be stored in a workshop or somewhere where leaks will not be a problem. I ordered the aerosol container because I have not heard about problems with Leaking, and the spray nozzle allows me to get the oil close to the parts that I need to loosen. It’s not cheap, however. I received it very fast and in great condition and I am very pleased.
Josh
Reviewed in the United States on October 12, 2024
If you really need to break something free, use this. Works great, but the smell is strong, so ventilate accordingly. Also, be gentle with the button, it will splash back when sprayed too hard.
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