Evans Prep Fluid is a waterless cooling system flush engineered specifically to purge the cooling system of water-based antifreeze after draining and before installing new waterless coolant. Prep Fluid should be used when block drains are unavailable or cannot be removed. It is not a substitute for thoroughly draining the cooling system and related components. Prep Fluid is NOT intended to be a stand-alone operating coolant, but as a flush only.
For use with all engines being converted to any Evans waterless coolant, after draining 50-50 coolant from the cooling system.
Evans Prep Fluid is ready to use—no water required.
To ensure success using Prep Fluid to prepare your cooling system for Evans waterless coolants and to determine the amount of Prep Fluid needed, follow the recommended installation procedure.
The primary objective of installing Evans waterless coolant is to eliminate many problems associated with water in conventional water-based cooling systems, while increasing reliability and engine life.
The conversion from a water-based antifreeze to Evans is a straightforward process that can be undertaken by anyone with some basic experience in engine mechanics, provided the instructions are adhered to.
An important part of a good installation is using Evans Prep Fluid. Prep Fluid is specifically formulated to purge remaining water-based antifreeze from the system after initial drain. Since certain parts of the cooling system might not drain completely by gravity, installing a scavenging fluid is the most practical method of removing all of the water-based antifreeze. The Prep Fluid is not formulated to chemically clean the engine of rust and scale, but the process of circulation and draining will help remove any loose sediment.