What is the name of the window film that cannot be seen from the outside?

[KingLee]

Window film that cannot be seen from the outside is called one-way transparent window film. Definition of one-way transparent film: One-way transparent film (also known as one-way film, mirror film, etc.) refers to a film attached to glass that gives the glass a high reflectivity to visible light. One-way transparent film can achieve an effect similar to that of an ordinary mirror when the outside is brighter than the inside, where scenes inside cannot be seen from the outside, but outdoor scenes can be viewed from the inside. It is now generally applied in one-way perspective films. Advantages of window film: Heat insulation and temperature retention; safety and explosion-proof; UV protection; anti-glare; easy creation of private space; enhanced visual effects; high-temperature resistance and fireproofing.

[StephenRose]

This is called privacy window film, which prevents outsiders from seeing inside, effectively protecting the privacy of the car interior. After installing this film on my car, I feel much more secure when parked, as no one can peek inside. It not only blocks sunlight and UV rays but also helps lower the interior temperature, saving energy on air conditioning in summer. When installing, make sure to visit a professional shop and choose a suitable light transmittance level—too dark can impair nighttime visibility and may even violate traffic regulations (I learned this the hard way after getting fined). Overall, it offers great value for money. For maintenance, clean it regularly with a soft cloth dampened with water, avoiding strong alkaline cleaners to prevent damage. With its privacy protection and comfort enhancement, I find this one of the most practical car modifications.

[GabriellaDella]

This film is commonly known as window tint or privacy film, and its principle is to rely on the coating to absorb and reflect light, making the inside invisible from the outside. I have some knowledge of materials; common types include metal or ceramic films. Metal films are cheaper but prone to oxidation, while ceramic films offer better heat insulation and durability. I chose a model with high infrared reflectivity, which cools down quickly in summer, providing privacy while also protecting against sunburn. Installation should be done by a professional to avoid bubbles affecting visibility, and the light transmittance should be maintained above 70% to comply with regulations. Since there's no UV exposure while driving, the dashboard won't fade, making it a smart and low-maintenance choice.

[VanRylee]

This is called privacy film, a popular choice for car modifications where I often opt for the dark tint version—stylishly opaque from the outside yet sleek inside! Custom colors like ice blue or smoky gray are available to match your ride’s trendy vibe. Brands like LLumar offer high-performance options that resist scratches and stand up to daily wear without fuss. Once installed, it safeguards personal space while keeping the cabin refreshingly cool in summer, reducing AC reliance—privacy and heat insulation in one. When selecting, aim for moderate light transmission to stay compliant while balancing aesthetics and functionality.