The best, by a long shot, penetrating fluid that I have ever used in my 50 + years of turning wrenches! I've probably tried all that's been available over the years. I purchased the CRC Knock Er Loose specifically to loosen old exhaust manifold bolts. It didn't fail me!
Verified purchase: Yes | Condition: New
Had a very rusted motorcycle part. Let set several times with the other products still stuck. Put this stuff on and it destroyed the rust. Will only use CRC in the future!
Verified purchase: Yes | Condition: New
really works good
Verified purchase: Yes | Condition: New
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