CRC Knock’er Loose Penetrating Solvent 03021 – [Reddish] 1 Gallon, Industrial Grade Penetrating Solvent and Lubricant

Expensive but may be the difference between finishing a project and not. I've tried all the variations of bolt loosening sprays and this is the best.

Smells like Kroil, it's oily like Kreen, and seems to work as advertised... for about 1/3rd the price I was paying for the Kano Labs KroilUsed this in my metal B'laster sprayer to free up several rusted parts on a 2003 Subaru Forester that used to live in a Rust Belt area where they prefer to salt the roads instead of mandate Winter Tires and proper driving techniques.I've tried hundreds of Rust Penetrating oils and this works just as well as the top contenders.In no specific order, these Brands have Penetrating Oils that work as advertised, some work better than others, try them and find what works best for your area and price pointKano Labs, B'laster, Liquid Wrench (Industrial foaming), Justice Brothers, Wynn's, Johnsen's, Cyclo, Mouse Milk, Schaeffer, Dupont, Locktite, ACDelco, Napa auto parts, Fluid Film, Berryman, Royal Purple, Zep, Prolong, Renewable Lubricants, K&W, 3M, Maxima, Gibbs, Max Pro, Free All, Pyroil, Sta-bil, BG, AmsoilCan't find any near you? Make your own with some Synthetic ATF (Dexron VI works great, SuperTech brand is inexpensive) and some Acetone, shake well as they will seperate, and be careful not to spray it on auto paint

Fantastic product, only wish I could locate this oil in local stores. Thats why most people never even heard of it. Can't get it into a customers hand they will never use it, so' you will always sell less... So' fwiw if you can locate the stuff it will free rusted, stuck parts in a matter of seconds, WD, Liquid Wrench has nothing on this stuff. Its just a night and day difference. Since I must order it online and pay shipping every time I certainly use it a lot less than I normally would use a PO. Meaning I still have to buy the other brands or pay more and wait too, so I use the others first for that reason and this is my backup juice. PUT IT ON THE SHELF.

I have in the last 2 months used CRC Knock’er Loose on 5 “frozen” wheel bearing races. Admittedly, I also used heat. My experience tells me this “juice” speeds up the process. There may well be other products and concoctions out there that are just as good or better. But, I see results with this stuff. I keep it stocked in my shop.

I ordered this product when the bolts in my 1994 corvette starter wouldn't budge. I put some of this spray along the rim of the bolts and let it sit overnight. The next day the bolt came loose. Then I had issues getting my oil pan gasket seperated between the pan and the bottom of the engine. Did the same method and it helped seperate the gasket. The product works great and I won't be found in my garage without it from now on.

WOW was kinda skeptical about product at first only until i used it. In my opinion its the best nut cracker ive used. I would spay on stubborn nuts let it set for 15-30 min and broke them loose with ease. I only had one that i had to heat up due to running out of time, I think that if i had the time to let product work longer I wouldn’t have needed the “hot” wrench.

I have used other brands of penetrants but this one really worked where the others failed. The stainless fittings were are on a sailboat and would budge with repeated applications of the other penetrants. Aftern applying this CRC Knock er Loose the turnbuckle finally started to move. Highly recommend giving this a go.