Can Windshield Washer Fluid Be Replaced with Tap Water?

1 Answers
DeBrayden
07/29/25 8:55pm
Windshield washer fluid can be replaced with tap water, but it is not recommended. Below are the functions of windshield washer fluid: 1. Cleaning performance: Windshield washer fluid is formulated with various surfactants and additives. Surfactants typically have functions such as wetting, penetrating, and solubilizing, thereby achieving the effect of cleaning and removing dirt. 2. Antifreeze performance: The presence of alcohol and ethylene glycol can significantly lower the freezing point of the liquid, thus providing antifreeze effects and quickly dissolving frost. 3. Anti-fog performance: A single-molecule protective layer forms on the glass surface. This protective film prevents the formation of fog droplets, ensuring the windshield remains clear and transparent with a clear field of vision. 4. Anti-static performance: After cleaning with windshield washer fluid, substances adsorbed on the glass surface can eliminate static charges on the glass, providing anti-static properties. 5. Lubrication performance: The ethylene glycol in windshield washer fluid has high viscosity, which can provide lubrication, reduce friction between the wiper and the glass, and prevent scratches.
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