Sodium silicate, commonly known as sodium silicate, is a water-soluble silicate, and its aqueous solution is commonly known as water glass, which is a mineral binder. Its chemical formula is R2O·nSiO2, where R2O is an alkali metal oxide, and n is the ratio of silicon dioxide to the number of moles of alkali metal oxide, which is called the molar number of water glass. Water glass commonly used in construction is an aqueous solution of sodium silicate (Na2O nSiO2).The larger the modulus, the harder it is to dissolve solid sodium silicate in water. Widely used in general casting, precision casting, papermaking, ceramics, clay, mineral processing, kaolin, washing and many other fields.