RX-90 Red Oxide Anti-Rust Primer is a fast drying protective coating for use on all metal surfaces. The modified alkyd resin binder and anti-corrosion pigments present protect against rust and provide an additional anti-corrosion layer for subsequent topcoats. RX-90 exhibits strong adhesion on degreased, bare metal surfaces and is paintable with all one-component paints after 1 hour. RX-90 can be welded through.