DY-MARK Zinc Guard Etch Primer is a fast-drying metal primer designed to etch and bond to hard-to-coat surfaces such as aluminium, galvanised iron, steel, ZINCALUME, copper, and brass. It provides strong adhesion, corrosion protection, and a reliable base for top coats, making it a practical choice for metal fabrication, maintenance, and repair work where a tough, durable finish is required.