Stops & seals coolant leaks. Works with any colour and type of antifreeze. Stops leaks and drips from wear and age. Seals leaks in radiator, heater core & freeze plugs. Radiator Stop leak works with all antifreeze solutions to stop small radiator and other coolant system leaks caused by normal cooling system wear and age. One bottle treats up to 15L of coolant. Suitable for 4-6-8-cylinder engines.