1K primer filler is a fast-drying all-purpose 1K primer with excellent adhesion and corrosion preventive and filling properties for all metal surfaces and conventional plastics which are use in automotive. It can be welded and is re-sprayable with all standard water-based base-coats and 1K and 2K topcoat systems. It is fast drying and, depending on layer thickness, applicable both as a primer and a filler.