... aluminum foil 5.Free samples Hebei Borunde Building Materials Co.,Ltd1.rockwool board2.heat and sound insulation3.rock wool ... , made of inorganic fibers. Slag wool is industrial slag such as blast furnace slag, phosphorus slag, fly ash as main ... variety of products, should be used for construction and industrial equipment, pipes, furnace insulation, fireproofing, acoustic, seismic, etc..Therefore we ...