Is it necessary to apply film after replacing the front windshield?

[MacLondyn]

Replacing the front windshield does not require applying film. Merchants usually promote the benefits of film application as follows: 1. Explosion-proof: The front windshield itself is laminated glass, meaning there is a polyvinyl butyral film sandwiched between two layers of glass, making an additional layer unnecessary; 2. UV protection: UV rays themselves have weak penetration, and the windshield glass, especially the polyvinyl butyral film within it, can already block a significant proportion of UV rays; 3. Reducing glare and improving visibility, heat insulation: The heat insulation effect is minimal, and applying film can darken the driver's field of vision, severely affecting driving safety. If film must be applied, it is sufficient to apply it only to the four side windows. The rear windshield can be left as is or have film applied; the actual significant function of film application is privacy protection.