Based on propylene glycol and hence gives a very safe level of toxicity when compared to ethylene glycol based anti-freezes. The ready to use formulation includes 50% distilled water to give zero lime scale deposits, optimum frost protection in severe winter conditions, plus excellent anti-corrosion performance. Anti-cavitation performance exceeds that of conventional ethylene glycol based antifreezes, providing the user with superior protection against engine and coolant pump damage. INFORMATION Compatible with most alloys,plastics, elastomers and gasket materials used in modern engine cooling system. Ready-to-use ? no dilution required. PRO COOL 1LTR