Sodium fluorosilicate is widely used in water fluoridation to help prevent dental cavities by strengthening tooth enamel. It is also employed as an insecticide and pesticide, particularly for controlling pests in agricultural settings. In the construction industry, it serves as a hardening agent and sealant for concrete and cement, enhancing their durability. Additionally, it is utilized in the production of glass and ceramics, where it acts as a flux to lower melting points and improve material properties. It is used in cleaning products and disinfectants due to its antimicrobial properties. In some cases, it is applied in metal surface treatment to provide corrosion resistance.