Zinc borate is an inorganic additive flame retardant, which is characterized by good thermal stability, both flame retardant and smoke suppression. It can replace antimony trioxide in some products and can also be used in conjunction with other inorganic flame retardants.

Due to its extremely low water solubility, this product is especially suitable for use as an acid source for intumescent coatings. Intumescent coatings on steel structures can meet the fire protection rating of DIN4102; it can also be used as intumescent coatings on wood or plastic.

Because there are both chlorine atoms and phosphate groups in the molecule, this product has significant flame retardant and plasticizing properties for plastics, unsaturated resins, glass fiber reinforced plastics, and rubber products.