(6) quart containers. ALL PURPOSE RUST REMOVER. Green Logic™ brand symbolizes biotechnology chemistry providing safer, effective, environmentally preferable solutions to a wide range of cleaning challenges. Core feels our environmentally sound solutions create a balance between a cleaner work place and better lives. Safer alternative to hydrochloric and phosphoric acids. Rust and deposits break free from surface for easy removal! REMOVES: Rust, Mineral deposits, Iron, Corrosion.