Mogas radiator coolant 50:50 is a coolant and corrosion inhibitor formulated using virgin ethylene glycol to enable effective performance in radiators, engine jackets, piping and heat exchangers by depositing a protective, micro-thin film on all metal surfaces contacted, including aluminum and multi- metal systems, as well as those systems with a high dissolved oxygen content and where flow is sluggish or even static. Note: mogas radiator coolant 50:50 is a ready to use product - do not add water.