Glass is the only panel where protection is a safety feature rather than a cosmetic one. A treated windshield sheds rain at speed and cuts how often the wipers run at night.
It is also the shortest-lived coating on the car, because the wipers abrade it every time they run. Expect to redo the windshield far more often than the paint.
Our pick A glass water repellent that takes minutes to apply.
Out of stock right now. The alternatives below are available.
Far easier than a full glass coating and it is the honest way to find out whether you care about the effect before committing to one. Rain leaves the windshield at speed.
Same job, different trade-offs.
An ammonia-free glass cleaner.
Out of stock right now.
Buy on Amazon
Ammonia damages tint and dries out rubber seals, and most household glass cleaner contains it. This is the boring correct answer.
Nothing much. Use two towels, one to clean and one to buff.
A durable glass coating for the windshield and side glass.
Out of stock right now.
Buy on Amazon
The long-lasting version of the same idea, and a genuine visibility improvement at night in bad weather rather than a cosmetic one.
Preparation is most of the job and the glass has to be genuinely clean. Frequently out of stock.
The original consumer water repellent.
Out of stock right now.
Buy on Amazon
In every parts store and it works. If you have never treated glass before, this is the cheapest way to see the effect.
Wears off in weeks and can smear if applied over a dirty windshield.
Prices come from Amazon and update hourly. We earn a commission on anything bought through these links, at no extra cost to you, and no brand paid to be here.
CarPro FlyBy30. A glass water repellent that takes minutes to apply. Far easier than a full glass coating and it is the honest way to find out whether you care about the effect before committing to one. Rain leaves the windshield at speed.
Much less time than one on paint, and the windshield goes first because the wipers abrade it every time they run. Most people redo the windshield at least twice as often as the rest of the glass.
Above about 40mph rain leaves the glass on its own and the wipers can mostly stay off. Below that you still need them. The real gain is at night in bad weather, when a clean sheeting windshield scatters far less light than a wiped one.
Most contain ammonia, which damages tint over time and dries out rubber seals. An ammonia-free automotive cleaner costs about the same and does not.
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