Twin Kool 2684 is a technologically-advanced, water-soluble, high-oil-content, heavy-duty semi-synthetic metalworking fluid that is engineered for general-purpose and severe machining and grinding operations utilizing ferrous and nonferrous metals, including automotive grades of cast aluminum. It is formulated with synthetic extreme-pressure lubricants, potent corrosion inhibitors, advanced polymers, and effective detergents to achieve optimum lubricity and metal-removal capabilities; to promote extended tool life; and to provide superior corrosion protection. Baths remain fresh and clean for extended sump life.