This specification establishes the requirements for nonaqueous engine coolants used in automobiles or other lightduty service cooling systems. Non-aqueous coolants that conform to the specification will function effectively to provide protection against freezing, boiling, and corrosion without any further dilution. This specification is based upon the knowledge of the performance of non-aqueous engine coolants prepared from new individual or mixtures of virgin industrial grade diols.

This specification covers general requirements (color, effect on nonmetals), physical and chemical requirements (relative density, dynamic viscosity, boiling point, thermal conductivity, flash point, ash content, pH, chloride, water, reserve alkalinity, effect on automotive finish [use clear coat thermoset urethane or acrylic urethane finish]), and performance requirements (corrosion in glassware, simulated service test, corrosion of cast aluminum alloys at heat-rejecting surfaces [mg/cm2/week], foaming).