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Also called metalized windshields, athermic windshields have a very thin reflective coating that acts as a screen or filter to deflect most of the solar (infrared) rays of the sun while allowing visible light to pass through the glass. The coating, which is applied during the glass laminating process, is meant to reduce radiant heat transmitted into the car through the windshield. Athermic windshields may interrupt or block radar detectors, tollroad passes, and even some remote garage door openers, and now have areas that are left untreated to prevent device blockage, though the areas on the windshield vary from one car model or windshield manufacturer to the next.

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