![]() ![]() Some of the products include a warning: Not to be used while driving!ĭo windshield sunshades work? Indeed they do. Usually costing $20 or less, it’s a simple rectangle of fabric or a combination of fabric and plastics (cardboard seems passé) that unfolds to fit across your windshield and block the sun’s rays. The sunshade is a low-tech, low-cost product that will combat the heat and its ensuing damage. That’s aesthetic, but it also causes materials to evaporate and release volatile organic compounds (VOCs). ![]() ![]() UV dries out other interior materials, including leather, vinyl, and other plastics, fabrics, and carpets. We’ve all seen badly discolored, cracked, and dried-up plastic dash pads. Some car shades are designed for winter use and attach to the outside of the windshield (typically with straps) to keep the window free of snow and ice.The windshield sunshade has a dual purpose: On warm days, keeping the interior of your parked car cool so you don’t suffer when you get back in, and also protecting against the damaging effects of ultraviolet (UV) rays. In a similar way there exist folding sunshades which can be attached to the side window of any car with magnets. Custom-made car sunshades with additional fastening elements such as hooks, clasps, buckles or magnets that attach to the car frame or shade, are prepared to fit specific car models, and may cover the entire side-window of a car. There are also self-adhesive sunshades which rely on static electricity to adhere to the window. These usually do not cover the whole window. There are small rectangular shaped shades for babies made from dark nylon mesh which are attached to the window with a suction cup. There are sunshades specifically designed to fit the inside of the front windshield of the car, and others designed for the car's side windows, or the back window. Typically, sun shields are made of a layer of mylar or aluminum foil which covers the inside of the car's windows, to reflect the sun's rays away, and preventing the interior from being exposed to those rays. ![]() There are several variants of car sun shade types. Sunshades may also be used while resting in a car, creating a sense of privacy and blocking out most of the undesired outside light from the sun in the daytime or from other cars and street lights at nighttime. Prolonged exposure to direct sunlight can also make the dashboard fade and eventually crack, or cause damage to items left in the car, such as mobile phones, laptops and other electronic devices. This is dangerous for adults, children, and animals. Without any protection, the sun can heat up a car's dark dashboards to 69 ☌ (156 ☏) within 60 minutes. Sunlight passing through the car's windshield produces the greenhouse effect, heating the interior to a temperature much higher than the outside air. During the summer they help decrease the inside temperature of the parked cars or protect passengers from direct UV rays. Some windshield sun shades have a reflective surface to bounce the light without hitting the objects in the car, reducing the interior temperature.Ĭar sun shades are mainly used in environments with strong and direct sunshine, and thus their usage is mostly seasonal and tied to the weather of countries. The visible light that passes into the interior through the windshield is converted into the infrared light which, in its turn, is blocked by the glass and gets trapped inside, heating up the interior. But it can't protect from the visible light that mostly penetrates through the window and gets absorbed by the objects inside the car. Typically, the glass of the car's windshield itself blocks most of the UV light from the sun, and some of the infrared radiation. ![]()
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