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Is it necessary to leave a triangular window when applying car window film?

2 Answers

MacPaige

07/29/25 6:01am

It is necessary to leave a triangular window when applying car window film. Below is an introduction regarding the need to leave a triangular window for car window film: 1. Relevant regulations: The Public Safety Industry Standard of the People's Republic of China "GA/T744—2013 Automotive Window Glass Sunshade Film" clearly stipulates that for the front windshield and the area used by the driver to observe the rearview mirror, Class I sunshade film should be applied, with a visible light transmittance ratio greater than 70%. 2. Purpose of leaving a triangular window: To allow the driver to see the rearview mirror more clearly through the window, especially at night when the light is dim, which can affect visibility.

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LorenzoFitz

08/12/25 9:31am

I think it's best to leave a small triangular window when applying car window film, mainly for safety reasons. Once, I helped someone apply film without leaving the triangular area, and as a result, the driver had blurry vision at night while reversing and almost hit someone. Nowadays, traffic regulations in many places require leaving a triangular area on the front windows to maintain light transmittance, otherwise, you could face hefty fines if caught by traffic police. Nighttime driving visibility is crucial—without the triangular area, it's hard to see clearly from the sides, which can easily lead to accidents. Especially in crowded cities with lots of pedestrians and vehicles, I recommend choosing a film with moderate light transmission and pairing it with a small triangular cutout. This ensures both privacy and safety. Maintenance is also simpler this way, as full coverage won’t interfere with cleaning.

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