CRC03020 16oz Knock'Er Loose Aerosol Spray

Over 40 years of wrenching I have used it all. From Kroil, LW, WD, Deep Creep, Trans fluid and acetone,... so not a novice. The last suspension job was a total bear. Anyone who has ever worked on an original Honda suspension will tell you that job could drive Mother Teresa to strangle the design engineers.This was the ONLY fluid that worked to loosen strut bolts stuck inside the rubber mounting and onto the weld nut. After heating, beating, impact wrenching, spraying...I finally broke down and got this. And I can tell you it worked wonders on extremely rusted bolts and screws. I will keep this around the garage from now on. The only fluid I can compare it to is Kroil, which is also top notch. But I ran out and couldn't get any in time so I popped for this. This is cheaper and works just as good. It worked on the rest of the suspension, the motor mounts, various bolts in and around the SUV like a champ.

Super slippery and super oily. Works great at knocking anything loose. It is a spray, so expect the orange liquid to get everywhere. And it smells awful too. That's how you know it works.Do not get it on your hands or clothes. Your hands will smell like automotive oil and your clothes will be stained of orange. As long as you use this oil responsibly, you should be fine. Also, make sure to wipe any oil off after its done its job. The oil has corrosive additives that will cause surface rust if you leave the oil on.

I have used several well-known penetrating oil sprays - PB Blaster, Free All, Liquid Wrench, Zep 45, LPS, and WD-40. They were all good and did its job. CRC Knock’er Loose stands above them all. It’s more of a solvent, reddish color that penetrates deep into tiny crevices. After wire brushing the exposed threads of an O2 sensor, I sprayed it with knock’er Loose and waited for 20 minutes. Surprisingly, the O2 sensor broke loose with very little effort on my part and I was just using an open end wrench. I’ve even used it on suspension bolts and nuts and it came off very easily. This is a must have if you like doing maintenance and repair work on your vehicles and lawn mowers.

I considered several similar products to help me open an outside door lock that had corroded in 15 years. After trying WD-40 and various lubes I used this product. It worked overnight and the lock works fine.

Best out there! Love the size of can. Seems like a can n a half. Ready when I need it. Spray on and let sit. Try to move bolt just a lil n spray once more, let sit n bolt or nut will be ready to start coming off!

Best stuff ever! Magic in a can as far as I'm concerned. If you have ever played airsoft seriously, you'll recognize the smell. Smells like green gas! If this stuff has the same oils in green gas, this stuff has hundreds of unlisted uses. Those oils are very versatile.

I have a very old car that I couldn’t get the nuts off when replacing my catalytic converter. This stuff worked wonders. I will be using this for any tough project I do in the future.

I also use this at work as a GSE mechanic for a major airline. It frees up nuts and bolts every time, especially those that have not been apart for years. It also has excellent lubricating properties.

This worked well and seeped into the tight nuts and bolts. Good product.

works good