Overnight Stain Remover is an all-new, award-winning product designed to remove oil & grease stains from porous surfaces like concrete driveways and garage floors. This product uses oil-eating microbes to clean deep beneath the surface, removing oil stains at the molecular level. Oil Eater's team of experts designed this oil stain remover to safely & effectively use at home or work - just 3 effortless steps: apply, allow it to dry to a powder, and then sweep away the powder for a stain-free surface!