Rain-X Heavy Duty Truck & SUV Wash is a 2-in-1: pre-wash spot treatment and car wash concentrate. It can be poured directly onto surfaces for spot treatment against the toughest stains e.g. caked-on mud, dirt, bug & tar. It also can also be mixed with water for a full vehicle wash. Super concentrated formula for heavy-duty vehicles such as trucks, SUVs, and larger-size vehicles.