This antifreeze/coolant is ethylene glycol-based and is recommended for all heavy-duty diesel applications, including truck, off-road, marine, and farm engines. It has a 116 Degrees F flash point, a 386.6 Degrees F boiling point, a -34 Degrees F freezing point, a pH of 10-11, and a specific gravity of 1.110 to 1.140. This purple antifreeze comes in a four-litre bottle.