Rust Scat Alkyd Primer is a urethane-based, rust-preventing primer. It can be applied to ferrous metals, both indoors and out. (Not intended for use on non-ferrous metals, such as galvanized metal or aluminum.)
Rust Scat Waterborne Acrylic Primer provides protection from rust bleed and flash rusting. Suitable for use over galvanized metal, Rust Scat Waterborne Acrylic Primer is not intended for immersion services.