Used as a leak stopper in the cooling and interior heating radiators of all internal combustion engines equipped with a water cooling system, whether they have holes or cracks. Instructions for Use: Shake the bottle before use. For best results, use one package for vehicles with a cooling fluid capacity of 2 to 18 liters. For vehicles with more than 18 liters of cooling fluid, use 2 to 3 packages. Minor dripping or slight leakage may occur for up to 48 hours until complete sealing is achieved. The production date and batch number are located at the bottom of the box. Do not exceed the recommended dosage mentioned above.