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KOOL-IT™ Radiator Flush


Kool-It® Radiator Flush is formulated with additives that circulate through the cooling system to remove scale, loosen rust, mineral deposits and combustion by-products from the coolant system and radiator of a car or truck.

Radiators use coolants primarily containing anti-freeze & water. Water contains minerals that form deposits over time on the metal surfaces of your cooling system and radiator. These deposits will reduce the heat transfer rate (which can cause overheating), the deposits also can cause corrosion of the coolant system components and reduce the efficiency and life of the anti-freeze.

The longer you drive your vehicle without flushing the radiator and replacing the coolant, the more likely that cooling system problems will arise. Extreme driving conditions, such as; operation in hot climates, extended service intervals, stop and go driving, operation in mountainous areas, speeds above 65 mph, towing, etc., increases the chances of harmful deposit formation in the cooling system.

The #1 Cause of Roadside Failure is Coolant System Related! Source: National Automotive Radiator Service Association

  • Quickly and safely removes scum, oily residue, sediments, rust, deposits and other degradation products from the cooling system of any car or truck
  • Safe for all cooling systems including aluminum radiators
  • Maximizes cooling system efficiency
  • Contains corrosion inhibitors
  • Contains no acids
  • Safe and easy to use
  • Requires no neutralizers

available sizes

directions for use


When used with a flush machine, follow the manufacturers’ instructions.

Without a flush machine:

CAUTION: Never remove radiator cap if engine is still hot.

With engine cool, open radiator drain petcock valve and drain the fluid from the system into a proper container. Close radiator drain petcock valve. Add KOOL-IT Radiator Flush to cooling system and fill with water. Replace radiator cap. Start engine, turn heat on high, and run for 10 minutes. Stop the engine and allow to cool. Remove radiator cap. Open radiator drain petcock valve. Drain water as before. Refill with water and replace radiator cap. Run the engine for 5 minutes, allow engine to cool.

Open radiator drain petcock valve. Drain water as before. Refill with with water. Replace radiator cap. Start and run engine for 5 minutes. Stop engine. Allow engine to cool. Remove radiator cap. Open radiator drain petcock valve. Drain water as before. Fill radiator with recommended anti-freeze and water mixture. Replace radiator cap.

For best results, always add KOOL-IT Supreme Coolant treatment (#96001) after flushing the system.

Also available! KOOL-IT Radiator Flush & Protect Performance Pack P/N 98001

Contains KOOL-IT Supreme Coolant Treatment P/N 96001 and KOOL-IT Radiator Flush



Lubegard Product Catalog

Lubegard Spanish Product Catalog

2019 LUBEGARD Catalog

2019 LUBEGARD Catalogo de Productos

KOOL-IT™ Radiator Flush - Product Data Sheet

Where to Buy