Solv-Tec's K-Seal HD is the quick, easy way to make permanent repairs to cooling systems on all trucks/tractors, industrial, AG, RV and larger capacity engines. The unique ceramic/copper formula mixes with all types of anti-freeze; just shake the bottle and add the contents to the engine coolant in any gas or diesel engine. Once the product has entered the cooling system it takes just minutes to make a high quality ceramic repair after the engine reaches working temperature.