Interpon Redox Active is a powder coating primer, totally free from Zinc. It is designed to give enhanced corrosion protection of mild steel and is an epoxy-polyester primer including active anticorrosive pigments. The addition of these pigments provides a steel passivation effect to protect the substrate enhancing the performance when compared to other non-active systems. Interpon Redox Active must be over-coated with an Interpon powder. Interpon Redox Active could be used as holding primer with a maximum waiting delay of 6 weeks.