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Cooling Products > Radiator-Stop-Leak

Radiator Stop Leak


Wynn’s Radiator Stop Leak prevents and seals minor external leaks in the cooling system and prevents head gasket seepage. It helps prevent corrosion and lubricates the water pump to improve cooling system efficiency and prolong pump life.

Features and Benefits:
  • Stops & prevents leaks

  • Seals leaks in radiator & heater cores

  • Prevents head gasket seepage

  • Will not clog radiator waterways nor affect temperature sensors

  • Suitable for all 4, 6 or 8 cylinder vehicles

  • Compatible with both conventional and O.A.T. coolant systems

  • Compatible with cooling system components

  • Easy to use one shot treatment

  • Treats up to 12L



Wynn’s Radiator Stop Leak is suitable for all 4, 6 or 8 cylinder vehicles and is compatible with both conventional & O.A.T. coolant systems. Wynn’s Radiator Stop Leak should only be used as a temporary repair for leaks. Wynn’s Radiator Stop Leak can also be used as a once-a-year preventative measure to ensure your cooling system operates without any damaging leaks.

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