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Can Alcohol Be Added to Windshield Washer Fluid?

2 Answers

Cheryl

07/29/25 9:04pm

Alcohol should not be added to automotive windshield washer fluid. The main reasons are: 1. Alcohol is a flammable substance with strong volatility. 2. The vapor it releases can form an explosive mixture with air. If exposed to high temperatures or open flames, it may cause combustion or explosions, leading to severe consequences. Additional Information: The functions of automotive windshield washer fluid include: 1. Antifreeze properties: It significantly lowers the freezing point of the liquid, thus preventing freezing and quickly dissolving frost. 2. Anti-fog properties: It forms a monomolecular protective layer on the glass surface, preventing fog droplets and ensuring clear visibility. 3. Anti-static properties: After cleaning with the fluid, substances adsorbed on the glass surface eliminate static charges, providing anti-static effects. 4. Lubrication properties: Its higher viscosity provides lubrication, reducing friction between the wiper and glass to prevent scratches. 5. Anti-corrosion properties: The fluid contains various corrosion inhibitors, making it safe for all metals, car paint, and rubber without any corrosive effects.

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DeBrooke

08/15/25 7:08pm

I once tried adding some industrial alcohol to the windshield washer fluid, thinking it would improve the antifreeze effect in winter. However, after just two weeks of use, the nozzle got clogged, and the fluid wouldn’t spray out. It almost caused me to lose visibility on the highway. Later, the mechanic told me that regular alcohol has too high a concentration, which can corrode plastic pipes and seals and even increase the risk of spontaneous combustion. If a short circuit occurs, it could potentially cause a fire. Now, I only use dedicated windshield washer fluid sold in supermarkets, which contains properly formulated antifreeze and cleaning agents in the correct and safe proportions. The price isn’t high, so there’s no need to take risks. My personal experience taught me that randomly adding substances can lead to safety hazards. It’s better to stick with officially recommended products for peace of mind while driving.

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