Barium sulfate sand, also known as radiation-proof coating or protective coating, mainly exists in nature as barite. Barium sulfate has a hardness of 3-3.5 (Mohs scale) and a specific gravity of 3.8-4.3, characterized by its high specific gravity, low hardness, and brittleness. Barium sulfate is chemically stable, insoluble in water, and non-magnetic and non-toxic. Barium sulfate sand and protective coatings are composed of various elements in specific proportions of granules and powders. When mixed with cement in a certain ratio, it can be used to plaster walls. Whether it's 325-mesh barium sulfate powder, 800-mesh fine barium sulfate sand, or coarser granules, the barium content is as high as 99%, and large quantities are readily available.