Zerex Asian Vehicle Red Antifreeze/Coolant 1 gal Prediluted 50/50 HOAT Silicate‑Free

Zerex Asian Vehicle Red Silicate- and Borate-Free 50/50 Prediluted Antifreeze/Coolant is a ready-to-use red HOAT formula engineered to replace OEM coolant in many Asian makes and protect cooling systems from corrosion, scale, freezing and boil-over.

This prediluted 1-gallon coolant is formulated for Asian vehicles that specify a red, silicate-free Hybrid Organic Acid Technology (HOAT) fluid with phosphate. It’s ready for service right from the jug—no mixing required—and is designed to match the performance needs of manufacturers such as Toyota, Lexus and Scion while meeting multiple OEM and industry standards. The chemistry focuses on long life and system cleanliness by avoiding silicates and borates that can contribute to harmful deposits in some cooling systems.

How does this coolant match Asian vehicle OEM requirements?

Zerex Asian Vehicle Red 50/50 is engineered to meet specific Asian carmaker specifications by using a phosphate-enhanced HOAT formulation that mirrors the red OEM fluids used by many manufacturers. It has been tested to comply with recognized industry standards and several manufacturer documents, providing a close replacement for factory fill fluids.

• Formulated to replace OEM red silicate-free HOAT coolants for many Toyota, Lexus and Scion models
• Meets standards such as JIS K 2234-1994, Hyundai/KIA MS 591-08 and Mitsubishi ES-64217
• Also meets broader specifications including ASTM D3306, ASTM D4985 and Ford WSS-M97B55-A

What protection does this coolant provide for engine cooling systems?

The long-life chemistry helps defend metal components against corrosion and rust while reducing the risk of scale and deposit formation because it is silicate- and borate-free. Its freeze and boil-over resistance come from the 50/50 ethylene glycol/water balance and corrosion inhibitors tailored for mixed-metal systems commonly found in Asian vehicles.

• Corrosion inhibitors protect aluminum, cast iron and other cooling-system metals
• Silicate-free, borate-free formula reduces formation of deposits and harmful scale
• 50/50 predilution offers freeze protection and higher boiling point for typical climates

How long will this coolant last, and how should it be serviced?

Designed as a long-life coolant, this HOAT formula provides extended service intervals compared with conventional antifreeze, helping reduce maintenance frequency when used as recommended. Always follow your vehicle manufacturer’s service schedule and check compatibility before topping up or replacing the cooling system fluid.

• Engineered for long-life performance—typical extended service intervals when used as intended
• Ready-to-use prediluted 50/50 solution—no additional water required
• Refer to the vehicle owner’s manual or dealer for exact replacement intervals and compatibility

Can I mix this coolant with other types or use it in non-Asian vehicles?

Mixing different coolant chemistries is not recommended because inhibitors can interact and reduce protection. While this product suits vehicles calling for red, silicate-free HOAT with phosphate, verify your car’s specification before adding it to a non-listed vehicle.

• Avoid mixing with silicate-containing or different-chemistry coolants to prevent inhibitor conflicts
• Check vehicle specifications—this product targets Asian makes that require red HOAT/phosphate formulations
• Use as a direct replacement when the OEM calls for a red, silicate-free HOAT coolant

Who is this for: Zerex Asian Vehicle Red 50/50 Prediluted Antifreeze/Coolant is intended for owners and technicians of Asian-brand cars and light trucks that specify a red, silicate-free HOAT coolant with phosphate. It’s especially useful for those who want a ready-to-use, long-life replacement that meets multiple OEM and industry standards and who prefer to avoid silicate- and borate-based chemistries that can promote deposits in certain systems. Always verify your vehicle’s coolant requirement before use.