For industrial and commercial use including machinery, piping, structural steel, marine vessels, storage tank exteriors, and power plant equipment. For priming properly prepared steel. Excellent for use as a high-quality shop primer. For use over solvent-sensitive coatings as a foundation for high-performance topcoats. Can be top-coated with alkyds, silicone alkyds, epoxy esters, epoxies, phenolics, acrylics, and urethanes.