Recycled Coolants

Antifreeze coolants made with ethylene or propylene glycol, recycled by reverse osmosis, distillation, and ion exchange and properly re-inhibited to meet ASTM D6471 or D6472 requirements have been demonstrated to provide service equivalent to non-recycled coolants. Recycled coolants of these types are preferred. However, suppliers of these recycled glycols must provide evidence the product is free of the contaminates listed below:

• Acetates

• Acetone

• Ammonia

• Boron

• Ethanol

• Formates

• Glycolates

• Ketones

• Nitrate

• Nitrite

• Phenols

• Phosphorus

• Silicon

• Toluene

Other recycled coolants, especially coolants recycled through filtration processes, are not recommended.