KROILOriginal Penetrating Oil (Aerosol Spray-10oz Can-Single) | Penetrant for Rusted Bolts, Metal, Hinges, Chains, Moving Parts | Rust, Corrosion Inhibitor (KS102)

Really like Kroil in any form, the spray can is really helpful for rusty bolts abs screws.

This stuff works well. It has a distinctive smell, so I recommend using it in an area with ventilation.

I have been using this product my entire life. It is amazing for doing exaust manifolds, turbos and any other mechanical work with rusty hard to loosen nuts and bolts. This oil is hard to find and I am soon pleased that Amazon has it. If you don't have this on the shelf in your garage you are not doing yourself any favors. This is a must for mechanics farmers and any other handyman doing DIY projects. There isn't another oil on the market that even begins to compare. This product is unmatched and by far the best in its class. It is literally no contest. Iykyk..

I purchased this Kroil oil to remove light surface rust from black lug nuts and the product worked great.Within a few minutes I could see the Kroil oil had dissolved most of the rust from the lug nuts. Very powerful product.Be sure to use in a well ventilated area preferably outdoors because the oil has a strong odor similar to firearm CLP.

Restoring a 35 year old Mustang GT and had to replace the old headers. The bolts were seized up good. Was going to WD40 them for several days and have another go when I heard about this stuff. Took a chance and the first thing I found - at the cost of a star - was that the application straw did not fit the nozzle and none of my other straws would, either. This is a pretty big deal as it made me shoot the bolts at long distance and I wasted a lot of overspray. Working on several things at once and this made everything wet, which is not appreciated.That said, it worked like a champ. I've been a back yard mechanic since the '70s and have used everything - oil penetrants like WD, liquid wrench, the torch - and burned up a lot of time and sweat - old cars require bloody knuckle mechanics. But this stuff - they spun off like brand new. It evens works faster than I expected - doesn't really require much soaking time to get in there.It'd be five stars but for that blasted straw. Seems a pretty amateur mistake for such a good product. But, mess, expense and all - I'm a customer for life.

This penetrant is so good, I was able to get loose 25 year old exhaust bolts like they were brand new, it did not put up a fight at all they came right out no problem. I soaked a week in advance and sprayed it again 2 more times in that week period. It got all the way into the threads. Highly recommend, I don’t think there’s a better penetrant out there

Excellent product, pricey though

Product recommended by local gun smith. Got to try it today after a range day. Seems to work well. Will continue using it on other firearms and see how it does.