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Yellow PRESTONE antifreeze coolant in a 1 gallon bottle

PRESTONE

PRESTONE AF2100 Antifreeze Coolant 1 gal Yellow

SKU CH-845D-8YH2F

Ready-to-use OAT coolant protects all vehicles for 10 years or 300,000 miles with a -34 °F freeze point and 226 °F boil point

  • ColorYellow
  • Ready to use straight from the bottle
  • Pre-diluted 50/50 mix saves mixing time
  • Protects engine for 10 years or 300,000 miles
  • Freezes at -34 °F and boils at 226 °F
  • Phosphate-free and silicate-free OAT formula

Ready-to-use OAT coolant for all vehicles

PRESTONE AF2100 Antifreeze Coolant is a pre-diluted 50/50 formula based on ethylene glycol. The OAT chemistry uses Cor-Guard inhibitors to protect every metal in the cooling system. Yellow colour identifies the fluid at a glance. It is sold new in a one-gallon bottle.

Fits any cooling system without mixing

The pre-diluted concentration removes the need for distilled water and measuring tools. Phosphate-free and silicate-free chemistry prevents deposit build-up in radiators, water pumps and heater cores. Biodegradable formulation simplifies disposal where local regulations allow. Pour directly into the reservoir or radiator neck.

Ten-year or 300,000-mile service interval

The extended-life rating reduces the frequency of drain-and-fill cycles compared with conventional coolants. Freezing protection reaches -34 degrees F and boiling protection reaches 226 degrees F. EPA SARA Title III Section 313 compliance is documented under 40 CFR 372. No supplemental additives are required for the rated interval.

Highlights

  • Ready to use straight from the bottle
  • Pre-diluted 50/50 mix saves mixing time
  • Protects engine for 10 years or 300,000 miles
  • Freezes at -34 °F and boils at 226 °F
  • Phosphate-free and silicate-free OAT formula

Specifications

BrandPRESTONE
ColorYellow

Questions about this item

How many miles or years does the Cor-Guard protection last under continuous driving?

The coolant is rated for 300,000 miles or 10 years of service life.

Does the ethylene-glycol formula run hotter or create more pressure than water alone during all-day operation?

It raises the boiling point to 226 °F and lowers freezing to -34 °F, reducing overheating risk.

Is the 50/50 pre-diluted mix ready to pour, or do I need distilled water and a flush kit first?

It is pre-diluted 50/50 and ready to use straight from the bottle.

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