Poly Ultra (OAT) Antifreeze / Coolant

The IRSI POLY ULTRA (Organic Acid Technology) was developed to fulfill the needs of a non-nitrite, non-amine, non-phosphate, (NAPS free) non-silicate type chemistry. IRSI POLY ULTRA depletes much slower than conventional and OAT (dex-cool) type chemistries. Some automotive engine OEM’s manufacturers have elected to have a NAPS free type of chemistry in their coolant line.



IRSI POLY ULTRA COOLANT can be used in a drain and fill option and will offer a recommended change interval (if properly maintained) of 750,000 miles! IRSI POLY ULTRA is compatible with gaskets, elastomers and other engine cooling system components and of course meets ASTM D-3306. This product is ‘ready-to-use’. Do not add water or other ingredients.



When IRSI POLY ULTRA is used as directed it will provide satisfactory performance in most cars including but not limited to the following:

Poly Ultra Antifreeze Colors: