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Gets in Tight Spaces
Kroil penetrating lubricants penetrate tight spaces and small openings to loosen stuck threads.
- Penetrates Quickly
- Attacks Corrosion
- Helps Remove Rust and Carbon Deposits
- Simplifies Repairs
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.
Breaks Down Carbon Deposits
Kroil not only breaks down rust, but also carbon deposits and other buildup that can seize metal parts.
GHM73
Reviewed in the United States on February 18, 2025
Got stuck nuts? Kroil will bust them loose! This stuff is the BEST. As long as you are diligent and patient, just spray, let soak, and repeat.
mtk nj
Reviewed in the United States on August 5, 2024
This is the best penetrating oil. Loosens rusted bolts and nuts.
DCNOTHAPPY
Reviewed in the United States on June 9, 2024
Working on an older car . very good for loosening & cleaning parts
Customer
Reviewed in the United States on February 4, 2024
describe as written. This product works very fast. Highly recommended
Brady O.
Reviewed in the United States on September 4, 2023
I've been using Aerokroil for about 14 years and it has always been a phenomenal product. It outperforms other penetrants by a lot. I would definitely recommend this product.
alan
Reviewed in the United States on September 28, 2023
Awesome stuff... must have for ur workshop.
Pat
Reviewed in the United States on August 3, 2023
Not low cost but I think the best. Used it to free a seized head stud on a 1931 Model A. Nothing else worked but using this 2x per day for a few days allowed the stud to be removed where otherwise it would have to be drilled out and larger one installed. Tried Sea Foam, WD40, etc but no comparison. No, I don't work for the company nor got it for free. Used to be called Kroil Original or something different, seems they just updated the name.
Dave
Reviewed in the United States on November 27, 2023
This is the only oil that I use.
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