The main ingredient in most modern coolants is ethylene glycol. Ethylene glycol is a colorless, odorless liquid that is highly effective at lowering the freezing point of the coolant and raising its boiling point, which helps maintain optimal engine temperature. This compound also prevents the formation of ice in the cooling system during cold weather and protects against corrosion within the engine and radiator. Although ethylene glycol is the primary ingredient, coolants typically also contain water and various additives to enhance performance and protect the engine from damage. It’s important to use the correct type of coolant recommended for your vehicle to ensure efficient operation and longevity of the engine.

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