Can Antifreeze Be Used as Windshield Washer Fluid?

2 Answers
AlanLee
07/28/25 7:19pm
Antifreeze cannot be used as windshield washer fluid because it lacks the cleaning properties of washer fluid. Antifreeze is designed to prevent freezing at low temperatures, while windshield washer fluid is formulated to resist deterioration at high temperatures. Functions of Antifreeze: Antifreeze is a specialized coolant containing additives, primarily used in liquid-cooled engine cooling systems. It offers excellent performance in preventing freezing in winter, boiling in summer, and resisting scale and corrosion year-round. Composition of Antifreeze: The main components of antifreeze are: 50% purified water, 40% methanol, and 10% other substances. How to Choose Antifreeze: The key indicators for antifreeze are freezing point and boiling point. Market-available antifreeze comes in specifications like -15°C, -25°C, -30°C, and -40°C freezing points. It is generally advisable to choose one with a freezing point at least 10°C lower than the lowest temperature in your region.
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MacTeagan
08/12/25 12:28am
I really don't think antifreeze can be used as windshield washer fluid. I tried it once in the middle of winter when I ran out of washer fluid and only had antifreeze on hand. I thought since they both have antifreeze properties, it should work fine. But when I sprayed it on the windshield, there was zero cleaning effect – it actually left more dirt residue and blurred my vision so badly I almost couldn't see the road while driving. Antifreeze is primarily designed for engine cooling, containing ethylene glycol and other anti-corrosion additives that aren't suitable for glass surfaces. Over time, it can clog the washer nozzles too, leading to system failures that cost a fortune to repair. Windshield washer fluid is specifically formulated for cleaning and frost prevention, costing just a few dozen yuan per bottle – economical and safe. My 10+ years of driving experience taught me: never cut corners on this small expense, or you might regret it after an accident. Antifreeze and washer fluid serve completely different purposes – never mix them up, as it seriously compromises driving safety.
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