Omega Rustblock Cold Gal is a zinc-rich, cold galvanising primer for long-term, extra heavy duty corrosion protection. Designed to prevent corrosion through galvanic protection by forming a protection barrier, encapsulates the metal in a zinc film. Ideal for use on clean, rust free steel in highly corrosive environments such as coastal regions. For use on all structural steelwork. Self-sacrificing the Omega Rustblock Cold Gal will react on ferrous metals to replace damaged surfaces and provide a protective barrier. Suitable for interior and exterior applications.