Radiator Stop Leak seals leaking radiators, heat converters, water pumps and flexible hoses. Radiator Stop Leak is compatible with all antifreeze brands.

Application area

For use in all water-cooled engines.

Application nodes

Shake well before use. Add the product to the coolant. Start the engine and open the heating valve and run engine for 5-10 minutes. After successful sealing process please check the coolant level.


250 ml sufficient to treat cooling systems of 4 – 8 litres capacity.

Treatment time

Works during operation