What primer systems are compatible with spray applied fire protection?
Gypsum based products are generally less chemically aggressive than those based on cement. Where cement based products are applied to primed steel, an epoxy type primer will generally be compatible whereas an alkyd based primer will not be compatible. Cementitious sprays are often applied to bare steel. It is essential that installers and the designer consult with the cementitious spray manufacturer to confirm the compatibility of any steel priming system.
