One gallon will treat approximately 400 square feet. Safe for use on concrete, vinyl, asphalt, brick, stone, wood, and virtually any exterior surface. Safe for plants when used as directed. Simply spray, watch stain disappear and rinse. It's that easy. The water treatment specialists at Pro Products offer a wide range of solutions that focus on rectifying problems, testing, cleaning stains, and maintaining the performance of water quality equipment.

• Removes well water rust stains from most exterior surfaces
  
• Rid ‘O Rust is safe for painted and un-painted surfaces, metal surfaces, stucco, concrete, stone, grout, and asphalt and will not etch concrete
  
• Easy to use: no scrubbing required
  
• Simply spray, watch stain disappear and rinse
  
• Safe for plants when used as directed