Two philosophies across eight products. A pre-mix is decided for you; a concentrate leaves the water to you. Open any one for its full colour range, chemistry and service interval. Everything below assumes DI or distilled — never tap, never filtered.
"Showcase" fluids are opaque or dyed for a look — some carry a stated duty-cycle limit, some just call for more frequent inspection. "Daily driver" means no duty-cycle restriction turned up in the listing. Open a fluid below for the specifics.
Aluminium is a hard no across the line — it voids the fluid warranty, and no coolant solves a galvanic loop. "Mix with additives" covers other coolants, dyes and silver coils: only DI water is neutral enough to mix into. Every finished fluid is formulated to run alone.

Keeping It Cool is the technical library of PrimoChill. Products ship from primochill.com.
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