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.

Great product, water based and won't harm your equipment. Using this to clean barrels on custom guns to take out carbon rings.

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.

Soaked items for 3 weeks and it did nothing, ended up using a citrus paint stripper and it worked great.

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

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.