Stabilize rusty surfaces prior to painting over with the system of your choice.A metal treatment that, when applied to rusted surfaces, causes iron oxide (rust) to chemically change to ironphosphate—an inert, hard substance that appears black. Once dry, the treated surface can be overcoated withwhatever paint system is desired. (Best results have been achieved with oil-base primers and topcoats. Test atrial sample before overcoating with epoxy or latex-based paint.) Application does not require the removal oflight rust, however loose paint, rust scale, dirt, oil, grease and other accumulations should be removed firstwith a wire brush.Key FeaturesResists and retards rustPaint job will last longer after an applicationOSPHO is water-thin and can cover a larger areaEffective for exterior and interior work alikeSpecificationsType: Rust converterCoverage: 600 Feet per gallonColor: GreenCure time: OvenightApplication: Brush