Based on low toxicity propylene gylocol, PRO COOL is an advanced, all-season engine coolant, formulated to provide superior cooling performance. PRO COOL provides optimum frost protection in severe winter condition whilst protecting against overheating, corrosion, and cavitation. The ready-to-use formulation includes 50% distilled water so will not leave any lime scale deposits and is compagtible with most alloys, plastics, elastomers and gasket materials used in modern engine cooling systems.