The dried film in Bright Zinc contains 60% pure zinc, needs no primer and is sprayed directly onto bare metal. It is designed to give up to four years protection in moderate outdoor conditions - a moderate to heavy coat, or two fine coats will achieve this. CRC Bright Zinc is designed to give an outstanding decorative finish. Balance this with a high level of corrosion protection and you have an all round professional coating. Ideal for after-weld touch ups. Ideal for use on: Fences, Trailers, Marine, Spouting and Gates.