Stop rust in its tracks! * It's easy to use. Just remove any loose rust and wax, oil or grease. Then brush Rust Encapsulator on (if you prefer, thin up to 20% with lacquer thinner) * It seals and stops rust and corrosion from spreading. Use over or under body fillers * Rust Encapsulator is a great primer for floor pans and other under-body parts. It fills tiny pin-holes and surface irregularities, and is compatible with lacquer, enamel and urethane top coats (including Eastwood Chassis Black) * For the absolute ultimate rust remedy, first brush or apply on Eastwood Rust Converter, then prime with Rust Encapsulator