Dow Ambitrol FL 50 is a 50% inhibited ethylene glycol coolant that contains a non-nitrite inhibitor package for low RPM compression engines (less that 750RPM). Ambitrol FL 50 is a completely formulated and prediluted coolant with ethylene glycol, deionized water, and a complete inhibitor system. AMBITROL FL 50 coolant is desirable when high quality dilution water is unavailable or when the convenience and accuracy of a prediluted product is desired.