This interior high-build zinc phosphate epoxy system delivers exceptional corrosion protection for carbon steel in highly corrosive C4 environments. It features an epoxy primer enriched with zinc phosphate to inhibit rust formation, followed by a micaceous iron oxide (MIO)-reinforced epoxy intermediate layer that enhances the primer’s long-term performance. The system is completed with a high-corrosion-resistant epoxy topcoat, providing superior protection and durability. Fully compliant with ISO 12944 C4 standards, it offers a service life exceeding 25 years on properly prepared steel surfaces. Ideal for structural steel, tanks, and piping, it is recommended for power plants, airports, industrial buildings, refineries, and mining equipment.