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KROIL Original Penetrating Oil 13oz Can Case of 6

Curated from 101 real Reddit conversations

Refreshed on: March 11, 2025

Product Image 1

KROIL Original Penetrating Oil 13oz Can Case of 6

Brand: KROIL
Price: $151
Snoop Score:
5.8
Sentiment
7.5
Popularity
9.9
Technical
3.8
Buy on Amazon for $151See All Corrosion & Rust Inhibitors Reviews
As an Amazon Associate, I earn from qualifying purchases.

Snoop's Take

Kroil Original Penetrating Oil is a highly effective aerosol spray designed for penetrating rusted bolts, metal parts, and moving mechanisms. Its unique formula allows it to reach tight spaces, making it ideal for loosening rusted components and preventing corrosion. Consumer feedback highlights Kroil's reputation as a trusted brand among professionals, with many stating, "Walk into any plant maintenance shop and every mechanic will have an orange can of Kroil on their work bench." Users praise its effectiveness for removing rusted bolts and preventing rust over extended periods, with remarks like, "Absolutely no rust in >6 months." However, some users express concerns about its higher cost compared to competitors, stating that while it is pricey, it is well worth the investment for its performance. Overall, Kroil Original Penetrating Oil is highly recommended within its category, especially for those needing a reliable solution for stubborn rust and corrosion issues. Despite some mixed reviews, its proven effectiveness makes it a top choice among professionals and DIY enthusiasts alike.

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

Will not mess up the blueing.

Positive Feedback

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.

Negative Feedback
Product
5.8
KROIL Original Penetrating Oil 13oz Can Case of 6
Buy on Amazon for $151
Preventative Maintenance
4 / 10
Marine Applications
4 / 10
Automotive Protection
4 / 10
Industrial Use
4 / 10
See how this compares to all Corrosion & Rust Inhibitors

What it does well!

Key strengths users can’t stop talking about.
Effective for removing rust without damaging finishes
“Will not mess up the blueing.”➕
Trusted brand among professionals
“Removing and Preventing Rust? Obviously got an old bolt gun, whats going to be the best way to remo”➕
“Walk into any plant maintenance shop and every mechanic will have an orange can of Kroil on their work bench. That says enough for me.”➕
“Kroil is worth the extra cost.”➕
“As stated, that Bishkek ammo is corrosive. Only site I’ve seen it lists it as such. Now it’s up to a”➕
Highly effective for removing rusted bolts
“it is the best. Rusty turbo bolts come right out instead of braking off.”➕
“Kroil, Freeze Off and Free All, have all performed better than Blaster for me.”➕
Highly effective for rust prevention
“If anyone has insight I'd really like to hear it.”➕
“Absolutely no rust in >6 months.”➕
Highly effective for rust removal and penetrating tight spaces
“Thoughts on Kroil. Trying to gauge whether or not to stock it in my store”➕
“Stuffs a miracle worker.”➕
“The oil that creeeeeps”➕
“Probably the most toxic stuff on the planet but works miracles.”➕
Kroil is recommended as a true penetrating oil.
“Get a true penetrating oil such as Kroil, PB Blaster, etc.”➕
Highly effective for breaking loose rusted parts
“by far kroil oil is the best! I've used it extensively in the industrial sector in powerplants and steel mills, and it is unbelievable the things it'll break lose.”➕
Highly effective for rust removal and protection
“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.
Higher cost compared to competitors
“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.”➕
“I’ve never heard of Kroil and I’m guessing it’s because of the cost most shops aren’t buying it.”➕
Mixed reviews on effectiveness in tests
“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.”➕

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
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STA-BIL Rust Stopper Anti-Corrosion SpraySTA-BIL Rust Stopper Anti-Corrosion Spray$12
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Boeshield BOESHIELD T-9 Rust & Corrosion Protection/InhibitorBoeshield BOESHIELD T-9 Rust & Corrosion Protection/Inhibitor$7
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RustKote - Rust Fighter AerosolRustKote - Rust Fighter Aerosol$14
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CRC Heavy Duty Marine Corrosion Inhibitor, 10 oz.CRC Heavy Duty Marine Corrosion Inhibitor, 10 oz.$17
7.2
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WD-40 Specialist Corrosion Inhibitor SprayWD-40 Specialist Corrosion Inhibitor Spray$15
6.7
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Fluid Film Powerful Rust & Corrosion Protection SprayFluid Film Powerful Rust & Corrosion Protection Spray$23
6.7
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KROIL Kroil Original Penetrating Oil 10oz CanKROIL Kroil Original Penetrating Oil 10oz Can$20
6.3
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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
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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

Core Power Plays

The specs and strengths that make it shine.
Experiences with rust in different environments
“Anything with a torx that has seen better days I use kroil if I can't heat it up.”➕
Curiosity about the effectiveness of VCI technology
“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.”➕

Hidden Hero Hacks

Unexpected tricks and side‑door uses you’ll love.
Discussion about using WD40 versus true penetrating oils.
“Thanks guys. I tried WD40 and it worked fine.”➕
“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 various penetrating oils and their effectiveness
“Relax. I was shocked, too.”➕

Buyer’s Cheat Sheet

What to check before you click ‘Add to Cart.’
Discussion on cleaning rifles and preventing rust
“It looks to be a Yugoslavian Mauser with a Serbian crest. Don't quote me on that though, I'm just go”➕
“your entire rifle is rusty. Neglect will do that.”➕
Comparison of Kroil with other lubricants
“Kroil is the best canned stuff, if you can find it, but PB Blaster is more common.”➕
“my curiosity is how does Kroil stack against BG In-force?”➕
Discussion about the humorous side effects of using Kroil
“It works good - makes one of my fellow techs puke though, good laugh.”➕
Discussion about preventing rust in tools
“What is everyone doing to prevent rust in their toolboxes?”➕
Questions about using Kroil on vehicle rust spots
“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 on the effectiveness of various lubricants including Kroil.
“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 on various rust prevention methods
“I feel like even after the more volatile oil components in it evaporate, the wax itself that's left behind helps.”➕
“Not really an issue when I use it, doesn’t wreck finishes.”➕
“A little cleaning goes a long way.”➕
“Alone, no chemical or product will solve the corrosion problem long term in a satisfactory manner.”➕

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