The DMK Series from MRL is a reliable range of direct-bonded magnesia-chrome bricks, made from high-purity sintered magnesia and carefully selected chromite ores. Fired at high temperatures, the bricks form a dense, continuous direct bond between the magnesia and chrome spinel phases, providing excellent thermal shock resistance, slag corrosion resistance, and vacuum stability. While DMK bricks may have slightly shorter lifespans than rebonded FMK types under extreme conditions, they provide a cost-effective solution without compromising core performance. As a result, DMK bricks are widely used as working and safety linings in steel and non-ferrous metallurgical furnaces, as well as working linings in chemical and pulp & paper industrial furnaces.