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 Penetrant I have used over 50 years
Best penetrant I have found over the last 50 years. I restore old cars and most have rusted bolts and nuts that have to be taken apart. Kroil penetrant does the trick better than any other---
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Great for those deep hard to penetrate places!
Would RecommendI’ve been using kroil since 2007! I will not use any other products for penetrating/loosing bolts! Only best for me!
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We now stock this at work!
Would RecommendAfter 20+ years in industrial maintenance this is still the first product I reach for
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Amazing product
Would RecommendI have used a lot of products through my career in the Army as a mechanic, this stuff works the first time all the time. Attacks rust and corrosion without any issues.
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I don’t know why more people don’t know about this
Would RecommendThis stuff is the real deal! It works when other products fail, it is now my go to penetrant. I use it on everything.
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Never lets you down
Would RecommendI have been using Penetrant in my automotive restorations for over 30 years now and it has never let me down once. It works every time!
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Awesome product
Would RecommendGreat product for gunsmiths and auto mechanics alike.
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Great for gun cleaning, automotive, and household!
Would RecommendGreat for cleaning fouled gun bores (WW2 surplus especially). Patch it in, let it soak, bore brush it, then more soaked patches, followed by clean patches. You'll be amazed how much better the bore looks. Working on your car? This is great stuff for removing seized bolts. Makes PB Blaster look like junk. I always rely on Kroil!!
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Best multi-faceted lubricant out there
Would RecommendTHE BEST out there! Loosens so much and also one of the best metal protectants I’ve found.
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The best
Would RecommendI first bummed out about this product from where I retired from they use it. I bought some and it works incredible on everything I’ve used it on bolts, lubrication, etc. it is the very best thank you
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Simply the best.
Would RecommendI worked in metal stamping. I have used many brands of creeping oil over the past 25 years. Kroil is not the cheapest creeping oil available, but it is the best. In my opinion, Kroil is the absolute best creeping oil made. And is worth every penny.
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I restore Antique Bicycles
Would RecommendI restore antique bicycles and many times these bikes have been left out in the weather for many, many years and the rust has about welded parts together. I was previously using a different product until I found Kroil. It is a little hard to find in my area, but it is a game changer. It's the best, Hands down.
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duramax6600@aol.com
Would RecommendKroil works to free up rusted parts where all others have failed. I always have cans of Kroil incase of a rusty bolt situation. I spray it on just in case so I don't snap the fastener . Everyone Needs Kroil in their cabinet or shelf ! Thanks Kroil !!!
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Magical product
Would Recommend[This review was collected as part of a promotion.] I've been using this product for over 35 years.Kroil is the best thing to sliced bread.
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Penetration
[This review was collected as part of a promotion.] I hear nothing but good words about Kroil for cleaning firearms and plan on getting some soon.
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A few drops
Would RecommendA few drops of this is all it took to free up the hood on my 73 year old 51 ford
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Best around
Would RecommendI started using Kroil 15 years ago, best pentrating for rust or just lube on the market.
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Top Notch Product
Would RecommendI was lucky to be given a can of Kroil a long time ago and being here in Canada, I had hoped to find it again. It straight out beats any other anti-seize spray I’ve used over the decades, and I ain’t a spring chicken! It is truly one of those items that you get what you pay for and I would gladly pay for again& again. Nothing else comes even close to being able to release stuck or jammed parts Top notch product
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Better than WD
Would RecommendForget about that WD crap. The one that creeps is the one you need.
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Works great!
I used Kroil after trying all the other usual products on some old rusty bolts. I watched as the Kroil actually crept into the threads and after letting it sit a bit the nuts were easily freed. I was impressed! Really didn’t take much to get the job done either.
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