Zinc borate is widely used as a flame retardant in various materials such as plastics, rubber, and textiles. It works by promoting char formation and reducing flammable gas release during combustion. It is especially effective in synergistic blends with other flame retardants like antimony trioxide and aluminum hydroxide. In the electronics industry, zinc borate is added to circuit boards and insulation materials to improve fire resistance and prevent short circuits. It also acts as a smoke suppressant, reducing the amount of smoke produced during burning. Another key application is in wood composites and coatings, where it provides both flame retardancy and resistance to fungal decay and termites. Its thermal stability makes it suitable for high-temperature processing in polymer manufacturing. Zinc borate is also used in lubricants and greases to enhance oxidation resistance and load-carrying capacity, improving performance under extreme pressure conditions.