Formulated to maximize horsepower. Revolutionary additive package maintains optimum engine temperature. Ideal for all water-cooled engines; exceeds OEM specs. Seals pinhole leaks or cracks. Protects against boil-over to 256F and against freezing to -26F. No silicates, phosphates or other ingredients that clog radiators. Available in 64-fluid ounce bottles, 4 per case.