Ratings may include incentivized customer reviews.
What Customers Are Saying
This penetrating oil is widely praised for its exceptional performance in loosening and freeing up rusted, stuck, or seized fasteners, bolts, and other hardware. Users consistently report successful results across a variety of applications, including firearms, vehicles, machinery, and household items. The product is also noted for its lubricating and cleaning properties, leaving surfaces shiny and clean. Many reviewers emphasize this as a must-have product, especially in areas prone to rust and corrosion.
Customer review summary generated by AI, including incentivized reviews.Best thing since sliced bread
Would RecommendBeen using this for years in my job as an industrial electrician. I also use it to clean firearms, and auto repair. It never fails!!!
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Love it
Would RecommendLoved kroil products for years..been using since the early days.
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The best solution to your stuck nuts
Would RecommendI use this on my nuts as often as I can. It's the best product to get them off.
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No more stuck bolts
Would RecommendBest experience for removal of stuck bolts. Working in the gas turbine busines, we got lots of stuck bolts. Besides that, I like the smell.
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Excellent product for corrosion repairs
I have been using the Kroil the last few years with great success at many bolt and corrosion problems when restoring vehicles has keep me from buying expensive old vintage parts etc,
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Great product
Would RecommendI have used Kroil for over 25 years because it works. Flat cans with the drip spout, and now I have transitioned to the aerosol can. I don't mean to be derogatory about your product but when I walk into someones shop that uses your product....I can smell it.
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Unsticks delicate motor!
Would RecommendI have been in the collectibles business for over 50 years. Among the stuff I deal in are antique toys, many of which are heavily rusted when found. Came across a great looking tin wind-up train from the 1950's whose motor was rusted/frozen solid. Soaked it in Kroil for 2 days, cleaned off the rust, and wound it up. It was so well lubricated (after a shot of Kroil spray) that it didn't want to stop. Just one example of how useful Kroil is to me.
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Kroil... better than the competition.
Would RecommendFrom kroil
Sweetest time saving and money saving liquid!
Would RecommendSo I'm new to kroil and was put on it by our mechanical shop at work as a "secret recipe" I have used so many different penetrating oil in the past from PB to Amsoil and nothing really caught my attention or my wow factor. This finally did it!! It is a bit pricey but like I have found in the past by cutting things off with a torch or beating the life out of it with a sledge its cheaper to buy the KROIL! I just purchased the small drip can first as a trial but have recently thrown all my oth...
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Great product, great features, better get you som
Would RecommendI was recommend Kroil Oil Penetrant by a gun smith. The best penetrant you can get. Can't be beaten because of it's multiple uses. Not only can it not be beat for loosening rusty bolts but works great for removing built up carbon in my hunting and match rifles. I'll never be at a rifle match and not have a full can with me on my cleaning cradle. I always know once my competitors see how great a job it does cleaning my rifle they are going to want to try it. Next questions from them is where can...
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Saving a relic with the help of Kroil
Would RecommendIm.working on a relic- a 1948 Willys CJ-2A. It's currently in many pieces thanks to Kroil. It's the best penetrant I've used, hands down. A little bit of heat, a Kroil soak and those 70 year old rusted bolts come loose! Amazing stuff!
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Try it You'll Like it
Product worked as expected
Verified Purchaser
Better than anything else I've tried
Would RecommendVery satisfied with how well it breaks down rust and works into stuck parts and it lasts quite a while if used sparingly.
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Plant tested
Would RecommendWe use Kroil for a multitude of issues on our heavy industry paintline. Nothing works harder or better and we've tried alot of different lubricants
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Best of the best
Would RecommendI’ve used Kroil in industrial applications for years and have a can at home. By far the best penetrating oil Ever! Thanks
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Best penetrant for stubborn or corroded hardware.
Would RecommendSimply one of the best penetrating solutions out there! I have used for most of my 41+ years as an aircraft mechanic. I discovered with my work on aircraft and it was so effective I purchased my own for use at home for use on all my stubborn hardware on engines, utility trailers, lawnmowers, and so much more. I even use it to simply keep hardware that I am not working on, to have a coating of Kroil to keep the parts serviceable and of course, should I need to disassemble it, its less challeng...
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Does it all when applied properly
Would RecommendI use this product on engines. I have freed up stuck piston rings in old outboard motors. Use for frozen rusted bolts and nuts. It has neve failed me! Works great on outside tools for lubrication and rust preventative. Try it, you will like it!!
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Kroil penetrate
Would RecommendI got a can of the spray penetrate and never had I found anything to compare to. This stuff by far supercides anything on the market. I will always have a can or two on hand. The best product by far. I have no pictures but I will next time on a project.
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Excellent products ct
Would RecommendI’m not a mechanic, but if idont have a can of this in my garage I get nervous! I don’t care who you are, if you do light maintenance of mowers, motorcycles, or any thing that requires taken apart this is what I use. As I told a buddy, if there’s rust, this is a must!
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