Quick answer
Zerex coolant in our directory means 7 products from Valvoline Global Operations. The manufacturer names 3 chemistries across them (HOAT, OAT, IAT). The spec codes it lists most often are US Fed. Spec A-A-870A, SAE J814, SAE J1034. Pick by the spec in your owner's manual, not by brand or colour.
Key takeaways
- 7 Zerex products listed, each linked to its source.
- Forms: Concentrate (4), not published (2), Premix 50/50 (1).
- 7 of 7 list at least one OEM or industry spec code.
- Approvals are shown as the manufacturer states them ("meets X per Zerex"), not as our endorsement.
- No prices, ratings or rankings.
Zerex coolant at a glance
Zerex products in this directory are made or sold by Valvoline Global Operations. We list 7 of them, 7 car/light-vehicle. Listed chemistries: HOAT (3), OAT (2), not published (1), IAT (1). Listed colours: Orange (2), Blue (1), Red/Pink (1), not published (1), Pink (1), Green (1). 6 of 7 state a service life, and 6 make a "free of" claim (for example silicate-free or nitrite-free).
These counts describe what Zerex publishes, not how good a product is. A product with no listed spec codes may still meet them. It means the manufacturer did not print them on the page we checked.
Zerex coolant products
Click a product for its full spec table, the manufacturer's exact approval wording, compatibility notes and sources. You can also open several products in Compare coolants.
| Product | Chemistry | Colour | Form | Spec codes listed | Service life (claimed) |
|---|---|---|---|---|---|
| Zerex Asian Vehicle Blue Antifreeze Coolant | HOAT | Blue | not published | 4 | up to five years or 150,000 miles |
| Zerex Asian Vehicle Red Antifreeze Coolant | HOAT | Red/Pink | not published | 2 | up to five years or 150,000 miles |
| Zerex Dex-Cool Concentrate Coolant | OAT | Orange | Concentrate | 10 | up to five years or 240,000 kilometres |
| Zerex Dex-Cool Ready To Use Coolant | OAT | Orange | Premix 50/50 | 2 | up to five years or 240,000 kilometres |
| Zerex G05 Antifreeze Coolant | HOAT | not published | Concentrate | 14 | 5 years / 240,000 km (light duty); 3 years / 482,000 km (heavy duty), per Valvoline Latin America product page |
| Zerex G40 Antifreeze Coolant | not published | Pink | Concentrate | 17 | not published |
| Zerex Original Green Antifreeze Coolant | IAT | Green | Concentrate | 11 | up to five years or 100,000 miles |
Chemistries Zerex lists
Chemistry is the inhibitor family that protects the metals in a cooling system. Here is what Zerex names across its products, with a short explanation of each family:
- HOAT (3 products): Hybrid OAT: organic acids plus a small amount of an inorganic inhibitor (silicate in "European" style, phosphate in "Asian" style). Older Chrysler and Ford gold/yellow coolants used HOAT families.
- OAT (2 products): Organic Acid Technology: carboxylate inhibitors, normally silicate- and phosphate-free, used for long service intervals. GM Dex-Cool-type and Ford orange coolants are examples of OAT families.
- not published (1 product): The manufacturer does not name the inhibitor technology on the source we checked.
- IAT (1 product): Inorganic Additive Technology: the traditional silicate- and phosphate-based "green" coolant with shorter change intervals.
Two products in the same family are not always interchangeable, because additive levels and approvals differ. See OAT vs HOAT vs IAT and G11, G12, G13 and G48.
Specs and approvals Zerex lists
These are the OEM and industry spec codes Zerex lists across its products. Each one reads as "meets [code] per Zerex". The manufacturer's own wording ("approved", "meets or exceeds", "recommended for") is quoted on each product page. A listing is the manufacturer's claim, not an approval by Coolant.com or by the vehicle maker unless the wording says so.
| Spec code (as listed by Zerex) | Family | Products listing it |
|---|---|---|
| US Fed. Spec A-A-870A | US federal | 5 |
| SAE J814 | SAE | 3 |
| SAE J1034 | SAE | 3 |
| SAE J1941 | SAE | 3 |
| Hyundai/Kia MS591-08 | Hyundai / Kia | 2 |
| JIS K2234 | Japan (JIS) | 2 |
| GM 6277M | GM | 2 |
| GMW 3420 | GM | 2 |
| TMC RP-302B | TMC (heavy-duty truck) | 2 |
| Cummins CES 14603 | Cummins | 2 |
| MTU MTL 5048 | MTU | 2 |
| GM 1825M | GM | 2 |
| GM 1899M | GM | 2 |
| Detroit Diesel 7SE298 | Detroit Diesel | 2 |
| WSS-M97B55-A | Ford | 1 |
| MS-12106 | Chrysler / FCA / Stellantis | 1 |
| WSS-M97B44-D | Ford | 1 |
| WSS-M97B44-D2 | Ford | 1 |
| MS-9769 | Chrysler / FCA / Stellantis | 1 |
| WSS-M97B51-A1 | Ford | 1 |
| MAN List 3.3.7 | MAN | 1 |
| CAT EC-1 | Caterpillar | 1 |
| Navistar MPAPS B1 III | Navistar | 1 |
| TMC RP-329B | TMC (heavy-duty truck) | 1 |
| John Deere JDM H24 | John Deere | 1 |
Showing the 25 most-listed of 40 codes. Each product page has its full list.
Industry test standards listed: ASTM D3306 (7), ASTM D4985 (4), ASTM D6210 (2). ASTM D3306 covers light-duty glycol coolants, D4985 and D6210 cover heavy-duty coolants, and D8039 covers propylene-glycol fluids for data-center cooling.
Not sure which coolant your car takes?
Find your coolant →How to choose a Zerex coolant
- Find the spec in your owner's manual (or the label on the coolant reservoir cap). It may be a code such as WSS-M97B44-D, GMW 3420, MS-12106, TL 774-G or MB 325.0, or a named factory coolant.
- Check whether Zerex lists that exact code. Use the table above, or type the code into Find my car coolant. Letter suffixes matter: TL 774-G is not TL 774-J.
- Open the product page and read the wording. "Approved" is stronger than "meets or exceeds", and both are stronger than "recommended for vehicles requiring".
- Choose premix or concentrate. Zerex lists 4 concentrate and 1 premix products here (some are sold both ways). Premix avoids mixing errors; concentrate must be diluted with distilled or deionised water. See premix vs concentrate.
- Do not mix chemistries. If the system already holds a different coolant, check the mixing checker or flush first. See can you mix coolant?
What Zerex does not publish (on the sources we checked)
We do not fill gaps with guesses. Where Zerex's page or sheet leaves a field out, we mark it "not published":
- chemistry: not published for 1 of 7
- colour: not published for 1 of 7
- freeze point: not published for 7 of 7
- service life: not published for 1 of 7
- data sheet link: not published for 0 of 7
The bottle label, the full data sheet or Zerex's technical helpline may give more detail.
Where to buy Zerex coolant
0 of 7 Zerex product pages here carry retailer links. These are the links Zerex itself shows on its product page, or its official parts store. We add none of our own, and they are not affiliate links. Many retailers block automated checks, so each link is labelled with its check status. We do not show prices.
When to see a mechanic
If you are not sure which coolant your vehicle needs, if the system has been topped up with an unknown coolant, or if you see overheating, coolant loss or a sweet smell, see a qualified mechanic or dealer. See coolant leaks.
Frequently asked questions
What type of coolant is Zerex?
Zerex lists 7 products here. The chemistries named are HOAT (3), OAT (2), not published (1), IAT (1). There is no single "Zerex type". Check the product that matches your manual's spec.
What colour is Zerex coolant?
Colours listed: Blue, Red/Pink, Orange, not published, Pink, Green. Colour is a dye, not a spec, so match the spec code rather than the colour.
Which Zerex coolant meets US Fed. Spec A-A-870A?
5 Zerex products list US Fed. Spec A-A-870A: Zerex Asian Vehicle Blue Antifreeze Coolant, Zerex Dex-Cool Concentrate Coolant, Zerex G05 Antifreeze Coolant, Zerex G40 Antifreeze Coolant, Zerex Original Green Antifreeze Coolant. Confirm the wording on each product page.
Is Zerex coolant premix or concentrate?
Both forms may exist. Here the forms are: not published (2), Concentrate (4), Premix 50/50 (1).
Is Coolant.com affiliated with Zerex?
No. Coolant.com is independent and not affiliated with or endorsed by Zerex. We name the brand only to identify its products.
New to cooling systems? Start with how a car cooling system works. Looking for a product? Search the coolant directory or match your manual's spec with Find my car coolant. See also coolant by car make and coolants by brand.