Insulating stones and insulating compounds having high heat resistance and particularly, high resistance to high temperatures, made of magnesite, dolomite, chromite, fire clay and other refractory materials and mixes thereof; fire burrs and refractory shapes made of magnesite, dolomite, chromite, fire clay and other refractory materials and mixes thereof with or without metallic layers or metallic inserts, as well as incoherent masses of such materials, all intended for the construction or repair of refractory linings of metallurgical furnaces of all kinds and for the construction of electric storage furnaces; magnesia cement, cement and components for construction made thereof in the nature of cement bonded posts, cement bonded particle boards, cement bonded panels, cement bonded composite panels, cement bonded pipes, cement bonded slabs, cement bonded flooring materials, cement bonded masses for the construction of furnaces, cement bonded masses for the construction of linings of aggregates or furnaces for melting metals, cement bonded masses for the construction of linings of aggregates or furnaces for melting metals, cement bonded masses for the construction of linings of aggregates for keeping, treating or casting metal melts; lime building materials, wooden building parts in the nature of fire resisting wood, wood boards, wood beams, wood joists, wood poles, wood posts, wood planks, structural and architectural members formed of pressed wood fibers, construction materials in the nature of non-metal composite panels composed primarily of wood