Liquid Odor Control Pine 1 Gallon: Our material is not a masking agent. It is a liquid that works on molecular activity, thereby breaking down the actual source of the odor. This is the same formula your city sewer departments use. It is perfect for carpets, drapes, garbage areas, going down drains, etc. It rinses film free. One gallon of material makes two gallons of finished product, because it is a super concentrate.