CRC 05021 Technician Grade Gasket Remover - 12 Wt Oz.

Excellent quality. Definitely cleans mechanical parts well. I used the entire box when rebuilding the top end of my LS2 and cleaning out the engine bay.

Actually works well to remove powdercoat from chrome & stainless. Does not etch the metal. Very pleased.

I purchased this to remove the head gasket and the crankcase gasket on my 1975 Honda CB 550 F SS. I've read some reviews where it is like a miraculous eater of gaskets that if left on long enough it will turn gaskets into liquid and you can remove them just with the wipe of a towel. While that "might be true" for some people, it definitely wasn't the case fore me. I did a few tests with it to see what the optimum time would be to let the gaskets "soak". I shook it up like a paint can (rattle can) to make sure it would have a smooth and even spray and saturated the gaskets with an even amount of the white foam. *First I let them soak for about an hour. Didn't have the "wipe off" effect. (They were softer however). I cleaned them off. *Soaked for 6 Hours. Still didn't have the "wipe off" effect. (About the same softness as an 1 hr). *Soaked them for 4 days. They foam dried up, which on the can it recommends that for removing paint, so I was pretty hopeful that the gasket would be very easy to remove. However, they weren't. There was gasket residue I was trying to remove from the head gasket, but even this method didn't nothing to remove them. Even with all of this soaking the gasket residue was still there and as solid as ever, but the crank case gasket was getting softer. I decided to use the SOAK FOR AN HOUR and SCRAPE WITH PLASTIC SCRAPERS method to remove the gasket left on the crank case. Honestly, this worked, it took a lot of time (about 8 hrs to get everything to a perfect mirror smoothness), but honestly worth it. While this isn't a miracle spray to destroy gaskets (might have been because my gaskets are as old as sin or something), but it is a great additive to help remove them quicker. Also a huge added bonus, it kills carbon deposits like a champ which should be advertised. The fact that it is a thick foam lets it cling to the pistons and valves and it eats the carbon right off them MUCH MUCH MUCH MUCH better than the carbon cleaner I purchased at a local auto parts store. OVERALL due to the fact that this isn't the miracle gasket remover and I don't see anyway it would work in the 10 - 15 minutes advertised on the can, but it did redeem itself as an additive and carbon slayer I'm giving it a 4 out of 5. ALSO, I'm going to post pictures of the gasket residue, gaskets, and carbon deposits (before and after) to help anyone else out in buying this product, because there's almost zero info anywhere about this stuff.

Good high. Not skin friendly. Use gloves or something.

Worked very well for me on gasket material stuck to aluminum. It sprayed out at fairly high pressure and with a wide spray pattern, so beware. Once the product hit the manifold it became a gel immediately, which was nice because it stayed in place. I think the 10min wait time was a bit short for the first pass. I probably sprayed and scraped 4 times to be sure, using Shark 66 Plastic Razor Blades.

It works but not quite as well as advertised. I had to clean off 16 years old baked on gasket material from aluminum engine parts, so a razor blade was out of the question. I purchased this can thinking it would make it easy. While it did aid in softening the extremely hard and brittle gasket material, it was still far from easy. I had to spray it on, wait 5-10 minutes, only to be able to scrape off only the topmost layer of material with my plastic razor blade. Then I had to spray again, wait 5-10 more minutes, and scrape the next layer, and repeat several times until all of the gasket material was removed. So, the product DOES work and DOES soften up the material but it requires repeated application.

VERY STRONG STUFF NEEDS REAL GOOD VENTILATION GLOVES ETC. NOT CHEAP BUT WORKS GOOD.

Wish I had this when doing valve covers, as this removed 30 year old baked on gasket, from my timing cover, like soft butter. I'll order this again on the next project. Advice to user, let it soak a bit longer than can said, especially if your removing original parts. On aluminum, when you can't go aggressive, patience is best, soak it a couple times if you need too.