Valvoline HD Nitrite Free coolant:

HD Nitrite Free Coolant RTU is suitable for common heavy duty diesel engine requirements. It incorporates organic acid technology to protect diesel engines from liner pitting and hard water scale deposits. The silicate and nitrite free extended life chemistry protects all cooling system metals from corrosion including aluminum.
Valvoline HD Nitrite Free Coolant can also be used in gasoline, stationary power, marine, natural gas and light duty applications.