3M Products Mar-Hyde One-Step Rust Converter Primer-Sealer

3M Products Mar-Hyde One-Step rust converter primer-sealer permanently transforms rust into a hard, black substance ready for topcoats. The water-based, latex-containing rust modifiers are easily applied directly over tightly-bonded or flash rust on iron and steel. This solution creates a chemical reaction that converts rust, eliminating extra time for sanding and priming metal surfaces in collision repair. Product details: * Works on tightly-bonded rust (iron or steel) and where flash-rusting has occurred (new degreased or mild steel) * Rusted surfaces will change from white to purple and finally to a stable black coating * A uniform black coating indicates the complete conversion of the rust * If any white streaks or actual rust remain, apply an additional coat of rust converter until the surface becomes completely sealed. * Prevents new rust, protecting the integrity of finished surfaces Show Less