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KROIL Kroil Original Penetrating Oil 10oz Can

Curated from 104 real Reddit conversations

Refreshed on: March 11, 2025

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KROIL Kroil Original Penetrating Oil 10oz Can

Brand: KROIL
Price: $20
Snoop Score:
6.3
Sentiment
7.5
Popularity
9.8
Technical
4.8
Buy on Amazon for $20See All Corrosion & Rust Inhibitors Reviews
As an Amazon Associate, I earn from qualifying purchases.

Snoop's Take

Kroil Original Penetrating Oil is a powerful aerosol spray designed specifically for penetrating rusted bolts, metal, hinges, and chains. It displaces water, provides lubrication, and prevents rust, effectively dissolving sticky residues without damaging the underlying metal. Consumer sentiment reveals that many users find Kroil highly effective for stuck bolts and rust removal, with one user stating, "Kroil is great, love that stuff." Additionally, its aerosol application is praised for convenience, making it easier to use without the frustration of traditional methods. However, some feedback indicates mixed results compared to competitors, with a few users noting, "Kroil always came in last or second last in ALL the video tests I've seen." Despite some reservations, the overall consensus leans towards Kroil being a recommended choice in its category, particularly for those dealing with rust and corrosion issues, as its effectiveness and ease of use are frequently highlighted.

Not for you? Check out our other rated Corrosion & Rust Inhibitors

It’s really good stuff.

Positive Feedback

Kroil always came in last or second last in ALL the video tests I've seen.

Negative Feedback
Product
6.3
KROIL Kroil Original Penetrating Oil 10oz Can
Buy on Amazon for $20
Preventative Maintenance
5 / 10
Marine Applications
5 / 10
Automotive Protection
5 / 10
Industrial Use
5 / 10
See how this compares to all Corrosion & Rust Inhibitors

What it does well!

Key strengths users can’t stop talking about.
Effective for stuck bolts and rust
“It’s really good stuff.”➕
Works better than competitors for some users
“Kroil, Freeze Off and Free All, have all performed better than Blaster for me and my Rusty Michigan cars.”➕
“Trust me when I tell you, you would try to impregnate the man who made Kroil 😅🤣😂.”➕
Good for long-term stuck bolts
“Is it really that much better than PB? I may buy a can myself now to try out.”➕
Convenient aerosol application
“Kinda pricey, but I imagine it's well worth not having to start using four letter words BEFORE you even get the fucking job started.”➕
“Just here to beat a dead horse: rust prevention I just moved out to the swamp to get away from the c”➕
“Stuffs a miracle worker.”➕
Highly effective for preventing rust
“Absolutely no rust in >6 months.”➕
Highly effective for rust removal
“The oil that creeeeeps”➕
“works miracles.”➕
Highly effective for removing light rust
“Kroil should wipe it right off and leave a nice protectant layer behind.”➕
“Kroil is great, love that stuff.”➕

Where it needs some work!

Areas to watch—feedback on possible improvements.
Mixed reviews on effectiveness compared to others
“Kroil always came in last or second last in ALL the video tests I've seen.”➕
“Kroil tests WORST, or at best 2nd last in every legitimate test video I've watched.”➕
Ineffective compared to other methods
“Alone, no chemical or product will solve the corrosion problem long term in a satisfactory manner.”➕
Less effective compared to some competitors
“Relax. I was shocked, too.”➕

Compare On All Talked About Dimensions

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CorrosionX Heavy Duty Rust Prevention SprayCorrosionX Heavy Duty Rust Prevention Spray$26
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CRC 06026 Heavy Duty Corrosion InhibitorCRC 06026 Heavy Duty Corrosion Inhibitor$13
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CRC SP-400 Corrosion InhibitorCRC SP-400 Corrosion Inhibitor$19
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Boeshield T-9 Rust & Corrosion ProtectionBoeshield T-9 Rust & Corrosion Protection$21
8.3
DetailsBuy
STA-BIL Rust Stopper Anti-Corrosion SpraySTA-BIL Rust Stopper Anti-Corrosion Spray$12
8.0
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Boeshield BOESHIELD T-9 Rust & Corrosion Protection/InhibitorBoeshield BOESHIELD T-9 Rust & Corrosion Protection/Inhibitor$7
7.5
DetailsBuy
RustKote - Rust Fighter AerosolRustKote - Rust Fighter Aerosol$14
7.5
DetailsBuy
CRC Heavy Duty Marine Corrosion Inhibitor, 10 oz.CRC Heavy Duty Marine Corrosion Inhibitor, 10 oz.$17
7.2
DetailsBuy
WD-40 Specialist Corrosion Inhibitor SprayWD-40 Specialist Corrosion Inhibitor Spray$15
6.7
DetailsBuy
Fluid Film Powerful Rust & Corrosion Protection SprayFluid Film Powerful Rust & Corrosion Protection Spray$23
6.7
DetailsBuy
KROIL Kroil Original Penetrating Oil 10oz CanKROIL Kroil Original Penetrating Oil 10oz Can$20
6.3
DetailsBuy
KROIL Original Penetrating Oil 13oz Can Case of 6KROIL Original Penetrating Oil 13oz Can Case of 6$151
5.8
DetailsBuy
Wuiil Fluid Film Lubricant/Corrosion Inhibitor, 11.75 oz.Wuiil Fluid Film Lubricant/Corrosion Inhibitor, 11.75 oz.$9
5.6
DetailsBuy
Fluid Film Rust & Corrosion Protection Spray - 6 PackFluid Film Rust & Corrosion Protection Spray - 6 Pack$60
5.5
DetailsBuy
CorrosionX Corrosion Technologies 90102 Multi-Purpose LubricantCorrosionX Corrosion Technologies 90102 Multi-Purpose Lubricant$27
5.5
DetailsBuy
Rust-Oleum 224284 Stops Rust Rust Inhibitor SprayRust-Oleum 224284 Stops Rust Rust Inhibitor Spray$14
2.6
DetailsBuy
soikoi CRC 06026 Heavy Duty Corrosion Inhibitorsoikoi CRC 06026 Heavy Duty Corrosion Inhibitor$56
1.7
DetailsBuy
Quicksilver Corrosion Guard Engine Protect Rust InhibitorQuicksilver Corrosion Guard Engine Protect Rust Inhibitor$12
1.7
DetailsBuy
Strikehold Marine - 12oz Spray LubricantStrikehold Marine - 12oz Spray Lubricant$19
1.6
DetailsBuy
Webetop Rust Prevention Spray, 15.2 OZWebetop Rust Prevention Spray, 15.2 OZ$19
1.4
DetailsBuy
Eazy2hD Rust Converter for Metal, 1 QuartEazy2hD Rust Converter for Metal, 1 Quart$24
1.1
DetailsBuy

Hidden Hero Hacks

Unexpected tricks and side‑door uses you’ll love.
Discussion about cleaning methods for firearms
“School me on corrosive ammo and rust prevention”➕
“That ammo is corrosive. It’s not an issue if you flush with a little water and clean it. Also, you”➕
“alright, thanks. the odd thing is this has never been an issue before, on this one or my 762 Saiga. ”➕
“How often should I oil and clean to avoid that. In south CA. So Desert”➕
Discussion on application methods for undercoating
“Do you just brush it on then?”➕
“i uuse a chintzy little house paint airless sprayer to apply it.”➕

Buyer’s Cheat Sheet

What to check before you click ‘Add to Cart.’
Discussion on various lubrication methods and products
“Interesting enough, most of the crowd favorites like ballistol, break-free, remoil, kroil, eezox and corrosionX did poorly.”➕
“I'm poor.”➕
“Cool find, Hoppes 9 and 5w30 has been treating me right for a while.”➕
“If it's good enough for my Toyota, it's good for my Kalash.”➕
Discussion about various cleaning methods for firearms
“Obviously got an old bolt gun, whats going to be the best way to remove the rust on the receiver and then preventing more rust in the future?”➕
“However as a rule stick to fine steel wool and avoid using de-rusting chemicals.”➕
Discussion on alternative penetrating oils
“Kroil is the best canned stuff, if you can find it, but PB Blaster is more common.”➕
“The acetone will evaporate.”➕
Curiosity about Kroil's availability
“One of the benefits of living close to where they make Kroil is that I can buy a 55 gallon drum.”➕
Discussion on various rust prevention methods
“I like using wax, specifically paste wax on my tools.”➕
“They absolutely sound like a scam ('here's a magic piece of plastic that stops rust!') lol, but it's a real technology.”➕
“it has significantly improved our never-ending fight against rust.”➕
“Not really an issue when I use it, doesn’t wreck finishes.”➕
Discussion on rust prevention techniques
“What is everyone doing to prevent rust in their toolboxes?”➕
“Pain in the ass, but at least you familiarize yourself with tools just that have little need.”➕
Inquiries about using Kroil on vehicle rust
“Can I use Kroil to just suspend the rust for now to keep it from getting worse?”➕

Cautionary Callouts

Know the pitfalls before they catch you off guard.
Discussion about personal experiences with the product
“It works good - makes one of my fellow techs puke though, good laugh.”➕
Discussion on effectiveness of different penetrating oils
“On the other hand that socket is a pain in arse to unplug.”➕
“If that's all you have, use it.”➕
“I have used WD-40 everyday of my career for the past 20 years and it has always served me well.”➕
“Not my first choice but it'll work.”➕
Discussion on undercoating effectiveness
“Is undercoating worth it on newer vehicles? Wondering if undercoating is worth it on newer vehicles.”➕
“Undercoating will prolong the life of your car, especially in the rust belt.”➕
“Rubberized or other hardening type coatings just trap moisture between the metal and itself letting it rust away.”➕
“I head straight to the carwash as soon as the snow is gone.”➕
Curiosity about different rust prevention products
“great stuff, but be warned it's got a powerful smell.”➕
“wear clothes you don't like and be *sure* to put down a tarp under the car when you put it on!!”➕
“It is really time consuming compared to spraying though so I only do it when needed.”➕

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