EKWB EK-CryoFuel Concentrate Coolant, 100mL, Clear

Does exactly what you expect, I have a full EK custom loop with metal hardline, I contact EK prior to a lot of the build to make sure I wasn't going to get metal contamination from the metal hardline and adding this just makes life a whole lot better when it comes to maintenance time. You should always have this or something like it in your system.

Usually use premix but this stuff is working great

色が付いていない方が水質の変化や異常に気付き易いのでこれしか使っていません。 ただしこれを書いている2025年5月現在、日本では手に入りにくくなっています。EKWB公式でまとめ買いした方が良いかもしれません。

I used EKWB EK-CryoFuel Clear in my custom water cooling loop for 8 months, and it performed flawlessly the entire time. I only changed it because I upgraded my loop, not because of any issues with the coolant itself. The clarity remained excellent, with no noticeable discoloration or buildup. My loop stayed clean, and my temperatures were stable the entire time. No signs of gunk, particles, or performance degradation, which is exactly what I wanted from a coolant. Filling and bleeding the system were easy, and I didn’t experience any noticeable evaporation or changes in coolant levels over time. I also used EKWB’s biocide, which likely helped maintain the system’s cleanliness. Overall, this is a great, reliable coolant for anyone using a custom loop. It lasted without any issues, and I would definitely use it again.

EKWB EK-CryoFuel Clear (Concentrate) mix with distilled water as directed, makes a litre of coolant for pc cooling, I have tried other clear coolant additives and found they discolour over time, Cryofuel Clear has stayed clear and without discolouration in my pc cooling system for over a year and was only replaced due to rebuilding the pc