Alphacool CKC is a specially developed coolant for PC watercooling systems. CKC is based on well-proven ingredients which were tested in industrial applications. This ensures maximum reliability and performance. CKC contains a special copper anticorrosive and does not contain Ethylene glycol, Ethandiol or other additives, offers the full thermal capacity of water and suppresses Algae and bacteria growth. It also contains additional inhibitors against corrosion. Alphacool does not use the standard anti-freeze ingredients which reduce the thermal capacity of the coolant but my be mixed with those. Coolants based on antifreeze require 25& antifreeze content to suppress algae and bacteria growth which lowers the thermal capacity. CKC is compatible with copper, brass, platings such as nickel, chrome, anodized Aluminum, Plexiglas (PMMA), POM and plastics for pump casings such asPPS-GF40 (Laing DDC ® amongst others) as well as PUR-, PVC- Tygon® and Masterkleer® tubing. Does not contain ethylene glycol or a bittering agent.