Can Antifreeze Be Mixed with Water?

[Rudy]

Antifreeze should not be mixed with water. Two different antifreeze additives must never be mixed together, as different brands of antifreeze have varying chemical compositions. Mixing them can easily lead to chemical reactions, which may severely damage rubber seals, often resulting in leaks at the water pump seal and weld joints. Consequences of Adding Water to Antifreeze: Approximately 95% of antifreeze products are ethylene glycol-based water solutions. Ethylene glycol is a colorless, slightly viscous liquid with a boiling point of 197.4°C and a freezing point of -11.5°C. It can mix with water in any proportion, and when mixed, the vapor pressure of the coolant changes, significantly lowering the freezing point. Functions of Antifreeze: Antifreeze is a coolant containing special additives, primarily used in liquid-cooled engine cooling systems. It offers excellent performance in preventing freezing in winter, boiling in summer, and providing year-round protection against scale and corrosion. Precautions for Mixing Antifreeze: Always use the same brand of antifreeze. Different brands may have varying production formulas, and mixing them can cause chemical reactions between multiple additives, rendering them ineffective.