No-Rosion Cooling System Corrosion Inhibitor stabilizes coolant pH and protects all six metals most commonly found in cooling systems from corrosion and electrolysis - including aluminum. Polymer dispersants in No-Rosion prevent hardness in water, and inhibitors in anti-freeze, dropping out of solution to form gels that cause scales and deposits that cause overheating. Proper use of No-Rosion extends coolant life to five years. The flush is a powerful industrial grade formula that helps remove antifreeze gels and rust particles. It neutralizes weak acids, cleans, and cleans/primes metal surfaces inside the cooling system.