Rust converter actually neutralizes existing rust by changing the chemical composition of rust to an inert protective barrier coating. Rust converter stops future rusting, corrosion and oxidation on iron and steel structures by covering the surface with a tough durable polymer barrier. No sandblasting is necessary! While other treatments can only prepare a clean surface for painting, Rust Converter transforms a rusty, scaly surface into a single inert paintable surface in just one step. Rust converter is water-based and ready to use. Non-flammable. Contains no lead or phosphoric acid. pH 7.0