GMNA 9984303 PDF

This specification covers the requirements for phosphate final sealant rinse materials, either trivalent chromium containing or chromium-free, for zinc and iron phosphatecoatings applied to metallic substrates. These sealants are to be used in conjunction with a specifically approved zinc or iron phosphate system (9984032,9984090,9984123 or 9984006) that uses all line materials from the same supplier.

Materials approved to this specification are to enhance the subsequent paint adhesion and improve corrosion resistance.