AGENT FOR SEALING METALLIC GROUND COATS, ESPECIALLY GROUND COATS CONSISTING OF ZINC OR ZINC ALLOYS

摘要

The invention relates to a sealing agent for metallic ground coats, especially ground coats consisting of zinc or zinc alloys, characterized in that it consists of an aqueous dispersion of a) at least one silane derivative and b) colloidal silicic acid and/or colloidal silicate. The inventive sealing agent can be used for directly coating metallic ground coats without said ground coats being chromatized.