A balance of phosphoric acid, dichromate, wetting agents and extenders for dissolving rust or preparing rusty metal surfaces for painting. Oxy-gone actually neutralizes existing rust by changing the chemical composition of rust to an inert protective barrier coating to stop future rusting. No sandblasting is necessary! While other treatments can only prepare a clean surface for painting, Oxy-Gone transforms a rusty, scaly surface into an inert paintable surface in just one step. Oxy-Gone is water-based and ready to use. Non-flammable. pH 1.75