NEO's KEEP COOL unique formula prevents rust, corrosion and mineral deposits in your engines cooling system especially with aluminum. Safe for all racing surfaces. Completely safe and easy to use, nontoxic and passes all safety tests. Non-injurious to all metals, paints, clothing or human skin. The finest water pump lubricant; no gummy residue to clog thermostats; will not gel; cleans while you drive. Gently extends water hose life. Not affected by permanent or 4ox regular type antifreeze solutions or by silicate drop-out in new type antifreeze.