Pencool® 2000 is a unique liquid formula to keep diesel engines running cleaner. This easy-to-use product reduces scaling and corrosion and acts as a lubricant in the cooling system. Pencool® 2000 controls formation of harmful scale deposits, reduces metal corrosion and cavitation erosion, and lubricates the water pump and other metal surfaces. Pencool® 2000 eliminates messy filters, saving you maintenance time costs.