InstaGone 4 Pack Refill! Manufacturer Special! Buy 4, 8 oz pkts. As seen on QVC! Each Packet Makes 1, 22 Oz. Bottle Effective on: mold, mildew, water stains, soot, nicotine Spray it on....Stains are gone! Works on ceilings, walls, bathroom tile grout & caulking, Exterior siding, fences, decks, pvc patio furniture and works on sidings & gutters & down spouts. Just mix with water, shake and spray it on!