Extruded polystyrene (XPS) is a normal insulating material and thermal insulating material often used in commercial buildings. To meet of flammability standards of XPS, XPS sheet material manufacturers will add a flame retardant during extruding to mitigate fire danger. The most commonly used retardant is brominated flame retardant. As a professional brominated flame retardant manufacturer, Yinsu will recommend the right flame retardant master batch according to customer production requirements.