INDEPENDENT COOLANT GUIDANCE
The right coolant.
A clearer choice.
Independent guidance on data-center liquid-cooling fluids and car coolant. Find the right specification, then source it with confidence.
Source liquid-cooling fluid
PG25 for direct-to-chip loops, immersion fluids, and bulk glycol. Tell us the fluid, volume and region, and we will review your request.
Request sourcing help →Explore liquid-cooling fluids →For data centers, fleets and facilities. Free sourcing requests, reviewed by a person.
Find coolant for my car
Start with your make. We’ll show a quick answer here, then you can open the full guide.
Have a specification code? Match it directly.
What brings you here?
Quick: Search · Spec codes · Losing coolant? · PG25 compared
Coolant for AI and data-center liquid cooling
GPU racks now run too hot for air alone. Direct-to-chip and immersion cooling depend on the right fluid, kept in specification.
What is PG25?
The 25% propylene glycol coolant used in most direct-to-chip loops: composition, freeze point and maintenance.
NVIDIA DSX Ready coolants
Which suppliers list qualified fluids, and what qualification means for your build.
PG25 coolant suppliers
Who makes and supplies PG25 fluids, and what to ask before you order.
Immersion fluid suppliers
Dielectric fluids for single- and two-phase immersion cooling, compared.
Direct-to-chip vs immersion
How the two approaches differ in fluid, maintenance and risk.
CDU coolant maintenance
A monitoring checklist for PG25 loops: sampling, inhibitors and top-ups.
Request sourcing help for your project →
Free for buyers. Every request is reviewed by a person and, only with your consent, shared with up to three relevant suppliers.
Coolant for your car
Match the specification in your owner’s manual, not the colour of the fluid.
What coolant does my car need?
Read the spec in your manual and match it to a product label.
Can you mix coolant?
When topping up with a different coolant is safe, and when it is not.
OAT vs HOAT vs IAT
The three main coolant chemistries, explained simply.
How often to change coolant
Typical service intervals and the signs it is due.
Low coolant
Causes, risks and what to do when the level keeps dropping.
Coolant product directory
Specs and approvals for widely sold coolants, side by side.
How Coolant.com works
Coolant.com is an independent reference. We are not owned by a coolant maker. Guides and product pages cite manufacturer data sheets and published specifications, and we tell you when something has not been confirmed.
For drivers, the site is free to use; some product links are affiliate links, which never change our recommendations. For data centers, fleets and facilities, our sourcing help is free: tell us what you need and we review every request by hand before, with your consent, introducing up to three relevant suppliers.
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Specification matters more than colour.
Coolant transfers heat and helps protect a cooling system against freezing and corrosion. Similar colours do not guarantee compatible chemistry. Start with the vehicle manual or equipment supplier specification, then match the fluid label. Understand coolant types →
General information, not professional advice. Follow your vehicle or equipment maker’s instructions. Never open a hot cooling system.