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Your cart is empty.CRC Knock’er Loose penetrates cracks, machine assemblies, frozen connections, and fittings with its freeze shock action to quickly dissolve rust, corrosion, grime, and grease. The 50-state compliant formula makes it easy to disassemble tools, automobile engines, plant machinery, and other equipment for routine maintenance. This industrial-grade penetrating solvent is NSF H2 registered for use in meat and poultry plants. It works effectively on various metal fittings, hinges, bushings, washers, lugs, nuts, bolts, metal joints, and couplings.
Janice long
Reviewed in the United States on March 5, 2025
Greatvstuff
Michelle Biazzo
Reviewed in the United States on March 19, 2025
this stuff is awesome will buy again.
Roger
Reviewed in the United States on September 30, 2024
Works great for losing rusty bolts. Worth buying. Never heard of this spray but works better then my wd40
Darin E.
Reviewed in the United States on July 9, 2024
I did a review of this yesterday. But here goes. I used this product on a se6 rotary cutter. This large, heavy implement is known for some very stuck bolts and nuts. I applied a few times over a few hours and let soak in. I believe this product saved me time and a huge amount of effort in the removal. Would have gave 5 stars if the bolts/nuts loosened themselves ;)
Richard card
Reviewed in Canada on July 1, 2024
No dislikes
James R
Reviewed in the United States on May 23, 2024
The door to my smoker had rusted shut over the winter. After trying other products with no success I saw a video recommending Knock'er Loose plus Penetrating Solvent. It worked better than I anticipated. Following the directions, the door loosened up and works just as before. This is my now go to for rusted bolts, hinges, or anything else metal that doesn't move and should.
Cory Levi
Reviewed in the United States on October 13, 2024
Best stuff I've used to move stuck bolts! Plus it smells good! My only complaint is that I can't find it in a store
Danny
Reviewed in the United States on April 25, 2024
I decided to give this spray a try and it was pleasantly surprised. The spray begins to break down rust immediately. It also has a sweet orange scent to it. I used on catalytic converter bolts, that were seized, and the O2 sensors. Followed the instructions on the can and am now a believer. Would definitely recommend.
jdogg
Reviewed in the United States on May 28, 2020
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
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