Stain Eraser is a powerful oxidizing stain remover designed to remove the toughest stains. Stain Eraser is a one part ready to use stain remover - no mixing necessary. Ideal for use on wood stains from furniture, mustard, yellowing from urine contamination, shoe polish, coffee, vomit and other staining materials. For food dye stains like red Kool-aid use Gorilla Chemicals Red Out. Dilution: Ready to Use. Do Not Dilute.