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.Kroil original penetrant
Would RecommendI use this stuff regularly and as a former mechanic I know that this works and love the technology behind it where it penetrates down into the metal soaking in forming a protective barrier .
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I've tried the rest, then I found the best
Would RecommendA friend loaned me his can to try on some rusted up and very stuck screws and bolts on an antique firearm. I followed his instructions and wound up letting it set overnight. The next day when I picked the piece up and applied on the slightest bit of pressure to the stuck components, they back out and with ease. I am sold on the product. Now If I can just find a store that actually has it in stock. Everywhere I have checked in my area they are out. This tells me the product is superb
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Kroil has been working longer than I can remember
Would RecommendI am 75 years old and have been using Kroil as my go to penetrant for as long as I can remember. When the situation calls for a product to attack rusted connections I go to the "orange can" on my shelf without hesitation.
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perf penetrant
Got my first tin from a gunsmith who recommended it over good old "no. 9" Have used a number of cans since, on old parts & oxidized fasteners. I like the smell, you put it on, wait a bit, and you can crank those parts loose. Went to the website to order a can for my son.
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Penetrater
I bought my first tin of Kroil from a gumsmith who recommended it in place of good old "number 9". Since then I have loosened many frozen parts and cleaned up many rusty fasteners. I even like the smell. Went onto the website to buy a can for my son for Chistmas.
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Best penetrant I've ever used
Would RecommendA couple drops of this stuff and within minutes it will break loose
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The best I've ever used.
Would RecommendI've been a satisfied user for over 2 decades, I only wish that I had discovered much earlier in my life!
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Just what the mechanic ordered
Would RecommendWas on my way to auto zone to pick up a can of penetrate as I was working on some stubborn automotive rusted fasteners. As I turned the corner to AZ lo and behold someone had lost a small box of items right in my pathway, stopped and saw my first can of kroil, partially opened and dripping on ground. Decided to take it home without making a purchase at AZ and it worked really good on the fasteners as stated. Very good product, will purchase more as needed. First experience with this item,...
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Always on hand
Would RecommendThis is a staple in my shop. They say its the best thing when breaking in a new rifle barrel.
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The best!
Would RecommendIf my Kroil won't break it loose you need a torch! By far the best penetrant on the earth. I swear by it for the toughest jobs!
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Very Pleased!!!
Would RecommendBeen using this product for years. Could not be more pleased with it’s continuing usefulness.
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Gets deep into the treads
Would RecommendTried Kroil a few weeks ago and I was very impressed with how quickly and effectively it penetrated a rusty nut.
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Saves Both Money and Time
Would RecommendThe drip can of Kroil combines the efficiency of the aerosol can, and a container that allows the user to apply sparingly. With the drip can, my Kroil can last a long time in the field and at home- never needing more than a few drops and time. Additionally, for users like me who play too rough, the applicator tip is durable and will definitely withstand long drops or being smashed around in a bag of tools. (Oops)
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Work licker than pig snot
Would RecommendI've used Kroil for over 30 years. I was introduced to it at my work place. Spray it on a rusted fastener and it foams up and seeps right in. This of course was with a spray application, drip works just as well but doesn't foam up. I kind of miss that.
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Super Penetrant and Rust Proctectant
Would RecommendI've been using this for several years. A friend introduced the product to me to help me remove screws from some of the family heirloom firearms that I had inherited. I was amazed at how the product penetrated and loosened the delicate old screws on the firearms. I also have heavy equipment and had a particularly difficult bolt to extract from one of my machines. Instead of pulling out the four foot cheater pipe (my usual method) I soaked it in Kroil over night and was able to extract it withou...
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Best I’ve used
Would RecommendLove Kroil oils. I’m an amateur gunsmith and auto mechanic. Been using Kroil for years I’ve found it’s my go to oil for all my firearms especially old restoration projects
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best stuff a mechanic can have!!!!
Would RecommendI have a can of liquid Kroil from years ago and it still does the job on my stuck parts!!!
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Smells great, less filling!
Would RecommendI've been using Kroil for years and won't use anything else. Hasn't failed me yet. Smells great too.
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Ancient wisdom
Would RecommendI've been using Kroil penetrating oil for 40 years. I have a can that's so old the propellant has died but it still dribbles out and does the job.
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Keeps everything working.
I have worked in Maintenance for over 35 years. I always use Kroil...It works and I even love the smell.
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