Fire retardant primer for metal is a specialized protective coating designed to reduce fire hazards and improve surface durability. It is applied as a base coat on metal surfaces such as steel structures, ducts, tanks, and fabrication work before applying fire-resistant paint systems. The primer forms a protective barrier that delays ignition and slows flame spread, enhancing overall fire safety. Its formulation typically includes fire-resistant binders, additives, and pigments that react under high temperatures to release flame-inhibiting gases and create a char layer, which insulates the metal from heat.