Top 20 Best Selling Radiator Conditioners & Protectants Oils & Fluids (2019)




Mr. Gasket's 40 Below reduces water temperature up to 40 degrees Fahrenheit. Makes coolant a better heat conductor, making the cooling system work more efficiently. Easy to use, just add to radiator excellent for racing, towing, street rods and RVs. ... more info

RMI-25 is a low-cost, effective safeguard against cooling system failure. It cleans while you drive; inhibits rust, cavitation erosion, electrolysis and pitting; lubricates water pump seals and thermostats; and improves cooling. RMI-25 should be at work a ... more info


Dike temporarily seals small leaks in coolant systems. A leak in a coolant system can lead to serious problems, such as overheating or engine failure. Antifreeze that leaks into the engine can form sludge that can plug oil passages and cause engine parts ... more info





Prestone Radiator Complete Care is formulated with patented Grafted Polymer Technology to extend and protect water pump life by reducing friction and protecting against corrosion in just 1 treatment. ... more info

Evans Prep Fluid is a waterless cooling system flush designed to seek out remaining water after draining the cooling system of an engine. Prep Fluid should be used when block drains are unavailable or cannot be removed. It is not a substitute for thorough ... more info



MotorMAX has been used in radiators for more than a decade on race tracks around the world to help race cars improve performance by reducing engine temperature. Now available for both your gas and diesel cars and trucks! Not only does it help protect your ... more info




Gunk Radiator Repair Powder stops leaks in radiators instantly and prevents new leaks from developing. Works in both water and anti-freeze solutions. Draining and flushing before application is not necessary, unless system is extremely corroded or dirty. ... more info


Prestone Radiator Complete Care is formulated with patented Grafted Polymer Technology to extend and protect water pump life by reducing friction and protecting against corrosion in just 1 treatment. ... more info


J.B. Radiator Stop-Leak is designed to stop leaks in radiators, head gaskets, blocks, soft plugs, valve ports, and heaters. It mixes with all types of antifreeze, holds under pressure, and will not clog your cooling system. ... more info

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