Fleetguard® PG Platinum Heavy-Duty Coolant is a propylene glycol based coolant which uses organic additive technology (OAT) to provide long lasting protection against corrosion and liner pitting (cavitation) and is compatible with the different elastomeric seals, gaskets, plastics and metal alloys used by OEM Heavy-Duty engine manufacturers. Fleetguard® PG Platinum can be used in all applications except natural gas applications.