Mar-Hyde - One-Step Rust Converter Primer Sealer, 10 oz. aerosol (3509)
Mar-Hyde One-Step Rust Converter Primer Sealer chemically reacts to convert rust into a hard, black primer sealer. Apply One-Step on rusted surfaces and rust is permanently converted and ready for primer and topcoat.  One-Step Rust Converter Primer Sealer is a water-based latex containing rust modifiers, which is designed for application directly over tightly bonded rust on iron or steel.  Also proven effective on new degreased or mild steel where flash-rusting has occurred.  Shortly after application, the rusted surface will change form white to purple to a stable black coating.  A uniform black coating indicates the complete conversion of the rust; white streaks or remaining rust indicates that an additional coat is required.