Revitalize the protective elements in your heavy-duty extended life coolant.
FINAL CHARGE® Global Extended Life Coolant/Antifreeze and Final Charge NOAT Extended Life Coolant/Antifreeze use organic acid inhibitors to provide protection for all cooling system metals. Topping off with water or other coolants could result in the diluting of the organic acid inhibitors to a level too low to provide sufficient corrosion protection. If this occurs, simply add Final Charge Extender to revitalize the protective elements in your Final Charge coolant.
To determine the inhibitor level of your coolant, use Final Charge Inhibitor Level Test Strips.