PRESTONE AF2100 Antifreeze Coolant 1 gal Yellow
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
- Product 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.
How it compares
Measured against everything we stock in Engine Service & Diagnostic Tools, at today’s prices. Recalculated every night.
- Price $8.99
- Cheaper than about 90% of the 1,113 comparable items (median $19.99).
Specifications
| Product | |
|---|---|
| Brand name | PRESTONE |
| Product color | Yellow |
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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