Non-fluoride based product designed to remove rust from concrete, stucco, laundry and hard surfaces. Designed to remove hard water stains left behind by lawn sprinklers. Easy to use. Application: Rust/Hard Water Stain Remover; Applicable Material: Ceramic; Fabric; Chemical Compound: Glycollic Acid; Oxalic Acid; Phosphoric Acid; Dirt Types: Rust Stains.