Porc-A-Fix Rust Transformer is the answer to the reoccurring rust issues with cast iron and steel fixtures. Neutralizes the rust and stops it in its tracks, prevents the rust from spreading and reappearing after the repairs are made. Once the rust is eliminated, Fill-A-Fix or Porc-A-Fix can be used to complete the repair and make any fixture look new again. Sandpaper and brush top applicator included.