Blue Devil Radiator Flush (32 oz)

Blue Devil has been making cooling system products for years, and their 00204 Radiator Flush is a concentrated formula that goes after the rust, scale, and grime that build up inside your radiator and heater core over time. A 32 oz. bottle is enough to treat most passenger car and light truck cooling systems.

Mineral deposits and corrosion accumulate inside cooling passages, especially in higher-mileage vehicles, and that buildup acts like insulation — it makes the cooling system less efficient at moving heat out of the engine. This flush breaks down those deposits so they can be drained out when you change the coolant. It works in all vehicles and is most effective when you let it circulate with water through the system before draining and refilling with fresh antifreeze.

If you are doing a coolant change anyway, adding a flush to the process is a low-cost way to clean out years of buildup and give your fresh coolant the best chance to do its job.