The ready-to-use Alphacool Eiswasser Crystal Red coolant is designed for cooling loops and is red. It is compatible with copper, silver, nickel and brass, as well as PVC, NBR, acetal, Plexiglas and nylon. It reacts to ultraviolet light.

It contains no biocides or anti-corrosion additives, so regular cleaning of the loop is recommended. The strong dye may...