Piston Kleen Carbon Remover 1 Gallon

This is the best product I’ve ever used to remove carbon from pistons (and I’ve tried everything over the years). I soaked some heavily encrusted pistons in this product for 2 days, then I wiped them off with a cloth. The carbon was softened to the point that I could just wipe it off. Amazing!

Works ok on some carbon build up, but not always effective at completely breaking down heavy build up even after soaking and mechanical agitation.

This stuff works amazing. I have been rebuilding an engine and not only does it clean the pistons, it is great at cleaning anything with carbon buildup. This stuff works amazingly. Well worth the money. Will definitely be buying it again. If you go to their website you can buy it in bulk which is cheaper

I soaked some pistons and brushed this on cylinder heads. It does remove carbon deposits, but takes quite a bit of time to do so.

Run away, I repeat, Run away this is junk!

It’s quite expensive and I expected all carbon to be dissolve overnight or so but it only does a little job even soaking the parts for more than a week.

Delivered on time, good packaging, and this stuff works great. Works better if you heat it, as the manufacturer does point out, but leaving it overnight works well too. Will definitely be using this again, it's particularly beneficial to have a non-toxic, relatively safe, biodegradable alternative to other chemicals that works so well.

I had a firearm and accessories with heavy carbon fouling that I had not cleaned like I should. It melted the carbon and the remaining clean up took very little effort. The aluminum was undamaged but the anodizing was ruined. I would highly recommend this product but it is for bare aluminum only. In my case ruining the anodizing was OK as there was no other way to remove the carbon. I had tried blasting, scrubbing, etc. So I was more restoring that cleaning.