Motul Radiator Stop Leak SpecificationMotul Radiator Stop Leak allows you to quickly seal micro cracks and small leaks in your cooling system. It can be used to fix a water cooler a heat exchanger a water pump a cooling hose... Radiator Stop Leak also lowers the engine temperature. This product can be used in curative or preventive modes and is suitable for all vehicles and coolants on the market.The 300 ml bottle is sufficient for cooling systems of 12 liters capacity. It is to be added directly into the coolant at operating temperature. Move all heater controls to "hot" position let the engine idle for 10 minutes and then check the coolant level.