Ready to Use (Pour Directly): It is the most practical and safest choice for an immediate top-up or a complete coolant system flush and refill. The liquid has already been pre-mixed by the manufacturer with the ideal proportions of deionized water. Simply pour it directly into your vehicle’s coolant reservoir.
Concentrated (Requires Dilution): This is the undiluted chemical fluid, which must never be used in the engine as is. It must be diluted with deionized water before use.