Metal Effects Permacoat Xtreme is an all-in-one water-base,100% acrylic, clear, non-yellowing protective sealer and top coat designed to work over Metal Effects Rust Activated Iron Paint. This innovative clear coat chemically arrests the oxidized metal finish, minimizing any further corrosion, and then self-crosslinks to create a weather resistant barrier. Permacoat Xtreme is highly recommended to seal the Metal Effects Rust finish on interior areas where there may be contact to prevent rub-off and exterior applications to prevent runoff of the finish onto surrounding surfaces. Unlike other acrylic varnishes, Permacoat Xtreme will form a film over the oxidized surfaces without cracking or yellowing. Permacoat is pH balanced to minimize the rust colors tendency to deepen in color tone.