Is the UV radiation in the car as strong as outdoors?
2 Answers
After applying window tint film, the UV radiation inside the car is weaker than outdoors. Here is relevant information: 1. Automotive window film: Automotive window film (Auto-tint-film) refers to a thin film applied to the front and rear windshields, side windows, and sunroof of a vehicle. This film is also known as solar film or heat-insulating film. 2. Functions: The primary purposes of automotive window film are to block UV rays, reduce heat transmission, prevent injuries from shattered glass, and minimize glare. Additionally, due to the one-way visibility feature of solar films, they help protect personal privacy. Furthermore, it can reduce damage to interior items and occupants caused by UV exposure. Through physical reflection, it lowers the interior temperature, decreases the use of air conditioning, thereby reducing fuel consumption and saving costs.
I only looked into this after my arms got tanned unevenly from driving in summer! Regular car window glass can only block UVB rays that cause sunburn, but not UVA rays that age the skin. Sitting in a car is like sunbathing through glass, with UVA penetration rates exceeding 60%. Side windows are especially concerning as they're thinner, allowing UV radiation intensity to reach 54% of midday outdoor levels. Even with regular heat-insulating film applied, UVA penetration remains above 30%. On long drives, I always apply SPF50 sunscreen, otherwise my arms would feel burning by day's end. Now I've specially installed UV-blocking film on my windows, which tests show blocks 97% of UV rays - that's when I finally felt at ease.
