Ensuring you are Ready for the Road Ahead , Simoniz Big Rig Heavy Duty Truck Wash is a slightly caustic and free-rinsing pressure wash cleaning liquid that can be used for a variety of applications, including oil and refuse trucks, as well as construction equipment. Successfully free your rig of film build up, grease, and diesel smoke with this truck wash cleaner that will restore your semi truck’s tractor and trailer to its shiny appearance. FleetPride is your First Click in Heavy Duty .