The Cortec VpCl-406 Exterior Vehicle Wash is a phosphate-free cleaner designed to remove salt, grime, oils, greases, and carbon deposits. It provides protection against flash corrosion on ferrous and non-ferrous metals. VpCI-406 can be metered into automatic bus and car washes, steam cleaners, dip tanks, or power wash equipment. It also minimizes water spotting due to hard water. The vehicle wash dries spotless and film free, is biodegradable, and will not affect painted surfaces, says the company. For hand applications, dilute with water up to 1:40 and apply to surface with cloth or brush and rinse with water.