GREENCOOL 300 is a concentrate of extended-life radiator coolant for heavy-duty machines. For this purpose, this propylene glycol-based concentrate contains hybrid corrosion inhibitor technology and does not contain nitrite and silicates. GreenCool 300 can provide excellent protection against corrosion in heavy-duty engines and cooling systems without requiring the addition of Supplemental Coolant Additives (SCAs) at the beginning of use. Yet, GreenCool 300 is also excellent to use on light-duty engines. It is a concentrated variant that requires water dilution.