Refractory cement is a specialized type of cement that is engineered to withstand extreme temperatures without degrading. This type of cement is commonly used in applications such as kilns, furnaces, incinerators, and reactors, where ordinary cement would fail due to high temperatures. The primary mechanism that allows refractory cement to perform under such extreme conditions is its composition, which typically includes calcium aluminate, fire clays, and other materials that have high melting points and thermal stability.