This high-performance three-layer coating system provides robust protection for carbon steel in C5 corrosive environments. It features an epoxy primer with zinc phosphate to inhibit rust, a MIO-reinforced epoxy intermediate layer for extended durability, and a polyurethane topcoat that ensures long-term weathering resistance and color retention. Compliant with ISO 12944 standards, the system offers a service life of 15–25 years on properly prepared steel. Ideal for structural steel, tanks, and piping, it is recommended for demanding applications such as power plants, airports, industrial buildings, refineries, and mining equipment.