Rust remover gel is a cleaner, safer, and easier rust remover for iron and steel. It is non-toxic, environmentally friendly, and contains no harmful or corrosive acids, alkalis, or solvents. High adhesive formula allows for simple and controlled application - gel clings to metal. Gel must remain moist to remove rust. One jar covers approximately 230 Sq. In. of surface area. Good for 1 year after opening.