LIQUI MOLY Kuhler-Dichter - seals small leaks in the radiator, metal porosity at solder points, hairline cracks. Seals damage that is rather difficult to localize (in this case, only a drop in the coolant level can be determined). This additive quickly eliminates leaks. Protects the combustion chamber from possible ingress of coolant into it. You can use the product with all types of additives in the cooling system and any antifreeze.