No Water Pressure
As it heats, water generates high vapor pressures that exert internal stress on cooling system components. When the engine cools, the pressure reduces. This repetitive process often leads to fatigue and component failure.
Because Evans waterless coolants have a boiling point of above 190°C and will not vaporize within the cooling system, they generate such low vapor pressure that you can remove the radiator or expansion bottle cap while the engine is running.
This pressure reduction eliminates internal stress on hoses, pump seals and radiator seams, thus extending operating life by many years and preventing breakdowns.