FS Fully Formulated 50/50 Pre-Diluted Coolant/Antifreeze is a 50/50 mix of Fully Formulated Coolant and deionized water. FS Fully Formulated should be maintained between 45% to 60% coolant and a 55% to 40% water mix for optimal performance.
FS Fully Formulated Coolant/Antifreeze is designed to provide superior engine protection for heavy-duty cooling systems. For years, heavy-duty operators were limited to using low-silicate automotive antifreeze that required the addition of a separate supplemental coolant additive (SCA) at initial fill and top-off. While this was effective, it resulted in mixing errors when the SCA was added. To prevent SCA variability caused by mixing errors and improve convenience, FS Fully Formulated Coolant/ Antifreeze was developed.