We had our chemists formulate a more effective rust converter. This new formulation consists of Rust Converter Part A and Converter Wetting Agent Part B. The combined components more effectively wet, penetrate and react with the steel and rust while minimizing air bubbles. Surfaces can be coated by brushing, dipping or spraying. It adheres to bare or rusty steel, and can be topcoated with most coatings. In fact we recommend top coating with Eastwood Rust Encapsulator for even greater durability. Includes 1 quart of Rust Converter, pt. A. Requires use with 12258ZP Rust Converter Wetting Agent Pt. B.