Zerex Asian Vehicle Blue 50/50 Prediluted Antifreeze/Coolant

Per the Amazon listing and back label, Zerex Asian Vehicle Blue is formulated to replace the OEM fluid in Asian-make vehicles that call for a blue, silicate-free, borate-free HOAT antifreeze — Honda, Nissan, KIA, Hyundai, Mitsubishi, and others. The product also meets Ford WSS-M97B55-A (a limited set of Ford models that specified the blue Asian-style HOAT chemistry), JIS K 2234-1994, ASTM D3306, ASTM D4985, and Federal Specification A-A-870A. Always verify against your vehicle's owner's manual before switching coolants — using the wrong coolant chemistry can cause corrosion or seal degradation.

Yes. The Amazon listing feature bullets confirm that Zerex Asian Vehicle Blue contains 30–50 ppm of denatonium benzoate as a bittering agent. Denatonium benzoate is an extremely bitter compound added to deter accidental ingestion by pets and children attracted to the sweet taste of ethylene glycol. The concentration (30–50 ppm) is below the SDS Section 3 disclosure threshold of approximately 1%, so it does not appear in the SDS ingredient list — but its presence is confirmed on the product label and listing. This is a meaningful consumer-safety feature compared to EG coolants that do not include a bittering agent.

The Blue and Red variants use the same phosphate-HOAT (P-HOAT) inhibitor technology and target overlapping Asian OEM applications. The primary distinction is the OEM color specification: some Asian manufacturers specify blue (Honda, some Nissan and KIA models), while others specify red (Toyota, Lexus, Scion, some Hyundai models). From a chemistry standpoint, both are silicate-free, borate-free phosphate-HOAT formulations. The colors are dye-only and do not indicate different inhibitor systems. However, some OEMs specify a particular color as part of their service documentation — verify your vehicle's owner's manual rather than mixing colors.

No — this is a 50/50 prediluted ready-to-use coolant. Pour directly into the cooling system per the manufacturer's fill instructions. The product as supplied delivers approximately −34°F freeze protection. A case-pack concentrate option exists (ASIN B071F6WL7P), but the 1-gallon bottle covered on this page is the pre-diluted product.

The SDS classifies this product as H302 (harmful if swallowed, Acute Toxicity Category 4) and H373 (may cause damage to organs — specifically kidney — through prolonged or repeated exposure if swallowed). Ethylene glycol is well-documented as attractive to pets due to its sweet taste and is acutely toxic to small animals and children even at small ingested volumes. The SDS §15 and back-label carry a California Proposition 65 warning for ethylene glycol (oral route). The product does contain denatonium benzoate at 30–50 ppm as a bittering agent, which serves as a deterrent — but this is not a safety guarantee. Store secured from pets and children; spent coolant must be collected for recycling, not left in drip pans or puddles.

Zerex Asian Vehicle Blue uses a silicate-free, borate-free, 2-EHA-free, amine-free, nitrite-free Hybrid Organic Acid Technology (HOAT) with a phosphate additive — commonly called P-HOAT, which is the standard chemistry for Asian OEM cooling systems that call for a blue formula. The label states a 5-year / 150,000-mile service interval. No independent used-coolant analysis (VOA) at the full claimed interval is publicly available; the interval is based on inhibitor chemistry and is consistent with HOAT service-life expectations for Asian-vehicle applications.

Collect spent coolant in a sealed container — do not drain to the ground, storm sewer, or household drain. Ethylene glycol is attractive to animals due to its sweet taste and is harmful if ingested. Most auto parts stores (AutoZone, O'Reilly, Advance Auto Parts) accept used coolant for recycling at no charge. Check your local store's policy before arrival.