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What is the best way to protect against heat in the car?

Hoch Elfi is also threatening temperatures of around 30 degrees Celsius in Germany in the coming days, in southern Europe the temperatures are and will be significantly higher. The car also heats up accordingly. But what is the ultimate sunscreen?

The ADAC tested it and subjected seven identical Dacia Dusters to a heat test. Four models received sun protection as accessories, i.e. a semi-garage, a reflective sun protection film that is stretched over the outside of the windshield, a white fabric cloth over the dashboard and a reflective protective film for the interior. In addition to an unprepared reference vehicle, a Duster with white paintwork and a model with tinted side and rear windows were also tested.

Window tinting is useless?

After four hours in the midday sun, the results were clear. In the reference vehicle, the ADAC measured 53 degrees Celsius. The white cloth on the dashboard brought three degrees less. Even the protective film on the inside couldn't prevent the device from heating up to 49 degrees. The protective film, which was mounted on the outside, brought it to only 45 degrees and the semi-garage, which covered the entire window area, achieved the best effect. Here it was only 43 degrees warm in the interior - ten degrees difference to the unprotected model.

Although the window tint only reduced the interior temperature by two degrees, it was able to prevent the rear seat bench from heating up. Instead of 57 degrees on the bench surface, only 48 degrees were measured in the vehicle with the tinted windows from the B-pillar on the bench.

And what role does the paintwork play when the car heats up in the sun? Hardly any. The paint temperature difference between the black (65 degrees Celsius) and white Duster (44 degrees) is 21 degrees. However, the interior of the white Duster only heated up five degrees less.

The conclusion of the testers: While the paint only plays a minor role in heating up the interior, dark interior surfaces cause a sharp increase. The steering wheel and dashboard can get hot up to 70 degrees Celsius in strong sunlight. Therefore, even simple covers manage to reduce these temperatures - for example on the steering wheel between 14 and 26 degrees depending on the sun protection element.


Who would have thought that a light-colored car paint does so little to prevent the interior from heating up. In contrast, the simplest protective parts are often enough to make the car noticeably less hot.


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