Converts rust into a barrier layer of magnetite. A bonding agent for epoxy, acrylic, and oil-based finishes. Gives exceptional bonding with moisture cured polyurethanes. May be used as a rust converter, or paint / etch primer. Eliminates the need to mechanically blast to white metal. Not for use with zinc chromates or zinc phosphates. Size: 1 qt. Coverage: Approximately 50 square feet, at 10 mil.