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Yellow Zerex antifreeze coolant in a one gallon drum

Zerex

Zerex 846437 Antifreeze Coolant 1 gal RTU Yellow

SKU CH-RE78-FQBQ5

Pre-diluted OAT coolant rated for five years and one million miles, freezing at minus thirty-four degrees Fahrenheit and boiling at three hundred twenty-five degrees Fahrenheit

  • ColorYellow
  • Ready-to-use 50/50 mix saves time
  • Yellow OAT formula protects heavy-duty engines
  • Rated for 1,000,000 miles of service
  • Freeze protection down to -34 °F
  • Boils at 325 °F for high-heat reliability

Zerex Heavy Duty Extended Life Coolant

Zerex 846437 is a pre-diluted 50/50 antifreeze coolant formulated with an ethylene glycol base. The OAT chemistry is nitrite-free, phosphate-free and silicate-free for heavy-duty extended-life service. Yellow colour identifies the fluid in the system. It is supplied in a one-gallon drum ready for immediate use.

Sustained protection ratings

The coolant carries a lifetime rating of 5 yr and a mileage rating of 1,000,000 mi under normal operating conditions. Freezing point is rated at -34 Degrees F and boiling point at 325 Degrees F, providing a wide thermal window for continuous duty. The formulation is not biodegradable, so disposal must follow local regulations.

OAT chemistry constraints

Organic acid technology eliminates nitrites, phosphates and silicates, which reduces deposit formation but requires a compatible cooling system. Mixing with conventional coolants can degrade inhibitor performance and shorten service intervals. California Proposition 65 warns this product contains a chemical known to the state to cause cancer.

Highlights

  • Ready-to-use 50/50 mix saves time
  • Yellow OAT formula protects heavy-duty engines
  • Rated for 1,000,000 miles of service
  • Freeze protection down to -34 °F
  • Boils at 325 °F for high-heat reliability

Specifications

BrandZEREX
ColorYellow

Questions about this item

How much heat can the Zerex 846437 coolant handle before boiling?

The coolant has a boiling point of 325 degrees F, so it stays liquid under normal engine operating temperatures.

What must the cooling system already contain for this pre-diluted 50/50 formula to work correctly?

The system should be flushed and free of old coolant; this product is ready to pour without adding water.

Will this nitrite-free OAT coolant protect older cast-iron blocks and aluminum heads together?

Yes, the silicate-free, phosphate-free formulation is designed for mixed-metal engines and heavy-duty extended life.

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