NI-640 is a quick and easy-to-use single pack acrylic enamel topcoat. It is specifically formulated to give a 1K single stage topcoat that will touch dry in normal ambient conditions within 20-30 mins depending on the temperature. It will be dry to handle (without baking) in 2-3 hours and fully hard dry in up to 7 days. NI-640 Line colours give faster drying and overall better performance, particularly gloss retention, when compared to the typical QD (Quick Dry) alkyd enamel. This is a particular advantage when painting large objects such as tractors and mining equipment.