Fast drying 1K primer based on polyvinyl-butyral resin. Can be used for treated and untreated surfaces of steel, aluminium and galvanised steel. Suitable as a pre-treatment for finishing with 1K and 2K acrylic coatings, alkyd resin coatings and water-based coatings. This product has a high solid content, high coverage and filling power, good corrosion resistance, high efficiency, is fast drying, easy to sand (both wet and dry) and gives a professional result.