Xstream Rad Seal. It eliminates leakages in the engine cooling systems: radiators, cylinder heads and units, and plugs. It comprises anti-corrosive additives, protecting against rust. It lubricates water pumps and helps prevent squeals. It is ideally compatible with anti-freezes, safe for rubber pipes. It works in the cooling system all the year round: it eliminates leakages as they appear. It repairs quickly and forever. It is enough for repair of the car and van cooling systems with the volume of up 20 liters. Application: 1. Drain the old coolant. 2. Prepare the fresh cooling fluid and pour it into the radiator. In old cars, clean the cooling systems first with COMMA Xstream Rad Clean. 3. Start the engine and let it warm up. 4. Thoroughly shake the bottle of Xstream Rad Seal and pour it evenly into the radiator. 5. Start the engine for several minutes. 6. If the hole is big, plug it with some metal item.