Coolant is made up of a mixture of two fluids †glycol and deionized water, plus special additives to prevent corrosion. When used in the vehicle’s cooling system they protect the engine from … A coolant is a substance, typically liquid, that is used to reduce or regulate the temperature of a system.

Coolant is a fluid that flows through your car's engine to regulate temperature, whereas antifreeze is a component of coolant. Antifreeze, typically made of ethylene glycol or propylene glycol, is mixed with … Coolant, on the other hand, is a mixture of antifreeze and water in the right proportions, ready to be poured directly into your vehicle’s cooling system. In essence, coolant is antifreeze with added water, …