CRC Knock’er Loose Plus Penetrating Solvent 03027 – [Reddish] 11.5 WT. Oz., Industrial Grade Penetrating Solvent and Lubricant w/ Freeze Shock Action

For $15 I was blown away at how well this stuff works. I needed to replace some exhaust parts on a nearly 20 year old car and the studs were completely rusted and looked like they would need to be cut out. I sprayed this on all of them and let it sit for a couple of hours before trying to remove them, fully expecting to break at least one of the studs off due to corrosion. Instead, when I came back a lot of the crusty looking rust was gone and after working the nuts back and forth I got all of them off without issue and was able to reuse them. It's an expensive spray but that bottle is a decent size and it sprays on easily. Whatever is in it works extremely effectively at lubricating through the rust and letting you get heavily rusted nuts off. Long story short, I highly recommend this stuff.

Seems to work better than other penetrating sprays. I plan to use it as my "first choice" from now on given the positive results so far!

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

Hate glazing corporations but this company knows what they're doing ever watched your self saying "I miss when they used to do good stuff"? well were living in that time with this company. sucks they don't sell this everywhere its great stuff value for money is there for me. if you don't use it much go with something cheaper if you plan on using it on rust bolts you'll love it. MIND YOU it's not black magic don't expect a miracle this might be 10-30% better than those lubricants out there. keep that in mind quality is there too I love it try it out see for you self but so far it does what it says 10-30% better than wd40 or other break loose lubricants.

This CRC Freeze penetration is legit. Busted loose all the exhaust manifold bolts on my original 289 engine in my 1968 Mustang. All original rust from Ohio. Uber impressed and so glad I did not resort to using a torch to try and bust bolts loose…

Works well. Spray it and wait overnight. Sometimes you may need to loosen a 1/4 turn respray and retighten several times. If this doesn’t loosen it the bolt is going to break.

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 ;)

Works pretty good, helps definitely to loosen bolts

Works better than any rust penetrating fluids out there never had a product work as good and as fast as this one

Very good for rusty bolts

No dislikes

I've seen this guy use this on YouTube. And he's got a favorite saying, like no way for f***'s sakes. Thought it would be. He made it look like it was a good product. I bought it. It's very expensive, and I had to go back to my old penetrating fluid. Because it didn't work for s***.