EVANS Waterless Prep Fluid flushing concentrate with funnel, 128 fl oz — removes residual coolant & moisture

Evans EC42001 Waterless Prep Fluid is a purpose-built flushing concentrate that finds and removes residual coolants and water so your engine is ready for Evans Waterless Coolant.

This 128 fl. oz. kit includes a specially designed funnel and a concentrated preparatory fluid formulated to chase out remaining antifreeze and moisture that standard draining often leaves behind. Using this product helps ensure the final water content in your cooling system falls within the limits required for waterless coolant performance. It also contains corrosion inhibitors to protect metals during the cleaning process, though it is not a replacement for Evans Waterless Coolants themselves.

How does this prep fluid improve a cooling system before installing waterless coolant?

The prep fluid actively dissolves and mobilizes pockets of old glycol-based coolant and trapped water left after a routine drain. It helps achieve a cleaner system so the waterless coolant can meet its low-water specifications and deliver expected benefits.

• Targets residual antifreeze and trapped water that drains miss
• Mixes with remaining fluids for easier removal via bleed or drain points
• Includes metal-protecting chemistry to reduce flash-corrosion during the flush

When should I use the funnel and how long does the flush take?

The included funnel makes filling and directing the flush simple, especially in tight engine bays. Typical flush cycles vary by vehicle complexity, but you can expect to run the system briefly to circulate the prep fluid, then drain and repeat as needed until samples show acceptable water content.

• Use when block drains are unavailable or inaccessible
• Run the engine to circulate—timing depends on vehicle and contamination level
• Repeat drain-and-refill cycles until test readings are within limits

Does this product protect engine metals during the flushing process?

Yes — the formulation includes inhibitors that guard common cooling system metals during the purging process. That protection reduces the risk of corrosion while you clean the system, but the fluid is intended only for preparatory flushing, not as a long-term coolant.

• Offers temporary corrosion inhibition during flush procedures
• Safe for mixed-metal systems when used as directed
• Not a long-term coolant—finish the conversion with Evans Waterless Coolant

What vehicle types and situations benefit most from this prep fluid?

This product is especially useful for engines where complete draining is difficult, such as modern blocks without accessible drain plugs or vehicles with complex cooling circuits. It’s also recommended for professional shops and DIY converters preparing a vehicle for Evans Waterless Coolant installation.

• Ideal for older vehicles with clogged or sealed drain points
• Useful in fleet and shop settings for repeatable, reliable prep
• Helpful when converting high-performance or classic engines to waterless systems

Who this is for: technicians, restoration specialists, and vehicle owners who plan to convert to Evans Waterless Coolant and need a reliable method to remove remaining antifreeze and water before fill. If you require a thorough, metal-safe purge that improves the chances of meeting the water content limits for waterless coolant performance, this 128 fl. oz. prep fluid with funnel is a practical, workshop-ready solution.