1 Corinthians 13:4-7 - "Love is patient, love is kind. It does not boast, it is not proud. It does not dishoner others, it is not self-seeking, it is not easily angered, it keeps no record or wrongs. Love does not delight in evil but rejoices the truth. It always protects, always trusts, always hopes, always perseveres."
Orison Logo
Hours: 8:30am-4:30pm CST M-Fri(800) 460-2403

Piston Kleen™

Carbon Remover and Parts Cleaner

piston kleen rockerPiston Kleen is a safe, effective, and economical water-based cleaner engineered to remove baked-on carbon, oils, greases and other soils from tracked vehicles, trucks and automotive engine parts. Developed to remove burnt-on carbon deposit in the piston rings on U.S. Army vehicles, Piston Kleen makes easy work of a major problem. Piston Kleen is recommended for soak tanks, cabinet washers, ultra sonics, and through-put machines.

Simply soak the piston/parts in Piston Kleen for 2 to 24 hours to remove even the nastiest build-up. Remove from solution when part is clean. Agitation and heat decrease the soak time, but is not necessary. Orison recommends agitation with a working temperature of 90o F. to 180o F. Note: Used pistons will have heat/stress induced wear under the carbon which may not be identified until after soaking.



  • Multi-Metal Safe
  • Non-flammable
  • No VOC
  • No DOT Transportation Restrictions
  • Biodegradable
  • Non-Toxic



"I recently bought Piston Kleen to use on a gas model airplane engine.  I was amazed at how well it removed the carbon on the piston and cylinder head.  This stuff is great!  Thanks!"



"Having tried every other product I could find that claimed to remove carbon, and not finding any that worked at all, I ordered Piston Kleen with rather low expectations. Wow, was I surprised!! After an overnight soak my heavily carbon caked pistons looked as clean as the day they were made. A soft bristled paint brush cleaned the sludge (what was left of the carbon) out of the ring lands, and I was done.
Amazing stuff, I can't recommend it highly enough."

David M.



"I ordered and used your product and am very impressed.
I fly an ultralight with a Rotax 447 2 cycle engine. After investigating your product I used it on my decarbonizing, we typically do one after 100-120 hours of flight.
2 cycle pistons are sometimes a bear to clean, your product did such a good job the club members were impressed."


piston kleen piston piston kleen piston piston kleen piston

Downloads & Links

piston kleen carbon remover

PDF Downloads

Product Data Sheet



Typical Properties

Appearance: Clear to Hazy
Odor: None
pH: 11-12
Specific Gravity: 1.02

Secure Transaction logoSECURE Ordering

credit card logo GSA Contract logo

FREE Shipping to lower 48 states!
55 Gallon Drums and 275 and 330 Gallon Totes are only shipped to Commercial Business locations. We will not ship drums or totes until the address has been verified as a commercial business address. If you require delivery to a residential address (or farm), please call 800-460-2403.