The flash point (the lowest temperature at which a combustible substance produces sufficient vapor near its surface to generate an ignitable mixture with air) of Evans waterless coolant is similar to that of a conventional water-based coolant, i.e., 248 °F/120°C.

Evans waterless coolant is hygroscopic, which means it has the ability to absorb moisture. As such, containers of unused coolant should be kept tightly closed. In the cooling system, Evans waterless coolant should not absorb a significant amount of moisture from the atmosphere as long as a conventional pressure cap is used. Under normal circumstances, the cap should not open, allowing air to enter the system.

Evans has always contended that the absence of water in a cooling system removes the root causes of metal corrosion, electrolysis, and high system pressures.