AkzoNobel Powder Coatings offers several choices when you are considering the use of a powder primer – anywhere where additional corrosion protection is required. Interpon Primers can be used for both liquid and powder top coat and for both ferrous and non-ferrous substrates. When using these products as a primer, the coated part should only remain in the oven for the amount of time necessary for the coating to melt and flow into a continuous film. The mass of the substrate will affect the time required for the powder to flow.