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Kroil Reviews

What Our Customers Are Saying

870
Long-term Use: Reviews referencing years or decades.
307
Compared to Others: Reviews using best/better comparisons.
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Showing:   2,304 Reviews
    Highest Rated

    Lifesaver!

    “I started using Kroil penetrant several years ago when I couldn't get a bolt loose on a piece of farm machinery that needed immediate repair. It's been a staple on the farm ever since. As a woman farmer now in my seventies, Kroil makes my work a lot easier.”
    Bolts & Fasteners Long-term Customer Industrial Rust Solutions
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    Highest Rated

    Nothing Compares

    “This product is by far the very best ever. I have been using Kroil for the past 20+ years as a mechanical tradesman. Whenever I encountered a rusty or seized job, I always reached for my goto friend and Kroil NEVER disappointed. Thanks for making my tough job so much easier!”
    Rust Solutions Long-term Customer Industrial
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    Highest Rated

    Great creeping oil

    “I’ve been using Kroil since I started work in a glass plant In 1978. My particular job was to maintain a 3000 degree glass furnace. When the burner tips would burn out we had to unscrew them and replace. Kroil was all we used to do this. Been using it ever since.”
    Bolts & Fasteners Long-term Customer Industrial Rust Solutions
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    i love this stuff!

    “ive been using kroil products for about 50 years now . used on early hot rods and harleys to heavy equipment now on towtrucks and rollbacks never fails and smells great too. thanks for a great line of products rick statler”
    Long-term Customer Product Praise Industrial
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    Spray feature to soak into expand bolts

    “Best product in its class ,use on modern Jet aircraft engine components, from the Hot sections to Turbine rear frame .Have used product for 30 years and to date have not found better product to help remove fasteners and bolts that have been in air 30 thousand hrs”
    Bolts & Fasteners Long-term Customer Industrial Rust Solutions
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    Simply The Best

    “30 plus year user. This stuff has never met a rusty nut or bolt it could not get loose. I am serious it must have some magic in the can. I won't buy another brand if I am out I will wait till it comes in. The other stuff out there pales in comparison. Simply the best!”
    Bolts & Fasteners Long-term Customer Comparison Industrial
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    Best there is

    “I have used Kroil since the 1980’s and no one else has developed anything that works as well. It’s funny when you show a coworker what it can do on a seized part and they say their next step would have involved a cutting torch. Incredible product that I swear by.”
    Long-term Customer Industrial Rust Solutions
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    Best Penetrant that I have ever seen

    “We used this daily at a Power House job, we tore down Turbine and large equipment. We would spray the Large bolts or nuts with the Kroil the day before and we would be able to take the bolts out or the Nuts off with out having to cut them off with a torch.”
    Long-term Customer Bolts & Fasteners Rust Solutions Industrial
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    Last Stop before the Torch

    “A can of Kroil has been the last word short of a cutting torch at the steel mill I've worked at for nearly 20 years. Gets in deep to break the joint between seized and corroded parts. Combine with applied heat, and it'll separate nearly anything.”
    Long-term Customer Industrial Rust Solutions
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    Best penetrant I have ever used.

    “I have restored classic cars for over 40 years. Nothing as difficult as taking apart rusted parts that have rusted bolts and nuts. I’ve used every type and brand of penetrant on the market and Kroil is the best performing one, hands down!”
    Bolts & Fasteners Long-term Customer Comparison Rust Solutions
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    Broken head bolt

    “We tried 4 other spray penetrants without any luck. Neighbor stopped by and brought a can of original kroil. 5 minutes after spraying kroil onto broken head bolt the bolt was easily removed. That was over 20 years ago.”
    Bolts & Fasteners Comparison Long-term Customer
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    Does the impossible for stuck threads

    “I bought a can of Kroil aerosol in hopes to get an exhaust manifold nut off. I sprayed it with Kroil, and waited until the next day to try it again. I barely needed a wrench, it came off so easily! Your products are amazing!”
    Penetrants Bolts & Fasteners Industrial Rust Solutions
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    Great thread problem cure !

    “I have used kroil all through out my 40 year career as a Pipefitter . Have not found any product that freed older threads, nuts. Fasteners . Keep a couple cans on my workbench still .”
    Bolts & Fasteners Industrial Long-term Customer
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    Best penetrating product ever!

    “I have been using Kroil for decades. I have tried other products [e.g., Liquid Wrench] that purport to do the same thing, but they don't even come close. Don't SPOIL it; KROIL it!”
    Comparison Rust Solutions Long-term Customer Industrial
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    Makes PB blaster and WD40 seem like aerosol water.

    “I’ve been using it since my indoctrination at a power plant 10 years ago. Breaks the most stubborn bolts free that were on the verge of snapping.”
    Bolts & Fasteners Comparison Long-term Customer Industrial
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    Doesn't get any better

    “Been working on commercial aircraft for 45 years your product is the absolute best penetrating oil I have ever used at work or at home”
    Bolts & Fasteners Long-term Customer Industrial
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    This works exactly like you need it to.

    “This does exactly what the other products promise but never deliver. This has saved my bacon many many times. From rusted salt spreaders to exhaust manifolds, I've never broken a bolt or fitting once I've sprayed it down and let soak a bit. This is amazing stuff.”
    Bolts & Fasteners Comparison Industrial
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    Top Dog!

    “I've been using Aerokroil longer than I can remember. It has saved me from breaking and drilling out bolts over and over. This is the best penetrant I have used in my 50 years as an industrial mechanic.”
    Bolts & Fasteners Long-term Customer Industrial Penetrants Rust Solutions
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    Best thing on the market I've been able to find.

    “As a mechanic over the last 45 years I've tried practically everything on the market to loosen seized nota and bolts. But most were a waist of money except for Kroil. This stuff has yet to let me down. Awesome product worth every penny in my book.”
    Bolts & Fasteners Long-term Customer Industrial
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    Old Harleys and Kroil

    “I have been using Kroil for 20+ years, nothing else comes close to it's effectiveness. I build and restore custom Harleys, and even 50 year-old rusted fasteners come free easily after treating with Kroil”
    Bolts & Fasteners Rust Solutions DIY Long-term Customer
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    AN ABSOLUTELY AMAZING PRODUCT

    “I was first introduced to Kroil as an aviation mechanic back in 1989. I was amazed then as I am today on how well this product works. It has been my #1 go to rust penetrant ever since.”
    Bolts & Fasteners Long-term Customer Industrial Rust Solutions
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    Saves the job always

    “Kroil has been my go to for stuck bolts. It has saved the day more times than I can count during my 43 years as a journey man machine repairman.”
    Bolts & Fasteners Industrial Long-term Customer
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    From Drilling rig to Pipeline !

    “Best penetrating oil. I’ve used Aerokroil since 1993 in the oil and gas fields , from drill bit to pipelines and plants. By far the best .”
    Bolts & Fasteners Rust Solutions Industrial Penetrants Long-term Customer
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    I restore antique vehciles

    “Kroil Penetrant with silicone has become an essential "tool" in my toolbox. As a hobby, I collect and restore antique vehicles, and I've tried just about every rust buster on the market, and I have found Kroil to be far superior. Kroil is the only penetrant I use in my garage.”
    Rust Solutions Comparison DIY Penetrants
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