What Causes the Small Dots on Car Window Tinting?

[LaPaislee]

The reasons for small dots on car window tinting are: 1. Poor quality film: The free tinting film provided by 4S shops may not be of good quality. 2. Poor technique: Improper application process by the technician or incorrect temperature control during film heating. 3. Counterfeit products: Over time, small bubbles may appear on the car window tinting. The benefits of car window tinting are as follows: 1. Heat and sun protection: The film can effectively block a large amount of heat generated by infrared rays. 2. UV protection: Medium and long-wave ultraviolet rays can penetrate thick glass, but applying a heat-insulating film can block most UV rays, preventing skin damage and reducing the aging of car interiors. 3. Safety and shatterproof: The base layer of the film is made of polyester, which has excellent tear and puncture resistance. Combined with the adhesive layer, the film enhances the glass's strength, preventing injuries caused by accidental glass breakage to passengers. 4. Creating a private space: By choosing the appropriate type of film, the interior of the car becomes difficult to see from the outside while maintaining clear visibility from the inside, ensuring privacy and safety.

[LilahFitz]

When I went to get the film applied, I was also puzzled as to why so many small dots appeared on the car film after just a few days. Later, I asked the film installer and learned that this situation is particularly common in the first two weeks after the film is applied. Most of them are water droplet marks left by the incomplete evaporation of the installation liquid, especially on cloudy or rainy days, which makes them more noticeable. If the ambient temperature is low or the car is washed directly after the film is applied, these small dots will be even more numerous. The installer said that as long as the windows are not rolled up or down for 7 days and the car is exposed to normal sunlight, these water droplet dots will basically disappear on their own. If they are still there after a month, it may be due to dust contamination during installation or bubbles not being completely removed, and professional treatment from a shop will be needed.

[DeLuke]

As an enthusiast who frequently helps friends with film installation, I've noticed that minor issues mainly stem from improper handling during the application process. Dust removal before installation is particularly crucial—even in a dust-free environment, tiny particles the size of a hair strand can sneak in. Additionally, incorrect squeegee techniques can leave marks. I've seen novice technicians use hard squeegees too forcefully, turning air bubbles into small white spots. Poor-quality films may even come with built-in particles, much like inferior plastic wraps. That's why choosing genuine car films and experienced technicians with a decade of expertise is essential—they even master the technique of spraying installation fluid flawlessly.

[IrisMarie]

Having been in this business for twenty years, I've encountered countless cases of customers complaining about tiny dots in the film. The main issues boil down to three aspects: an insufficiently clean working environment, inadequate water-squeezing techniques, or poor-quality film itself. Our shop mandates the use of professional dust-free spray systems, workers must wear anti-dust headgear, and even their clothing must be made of non-woven fabric. Yet even with these measures, a single speck of dust blown from an air vent can ruin everything. The most frustrating are those low-cost films that come with inherent crystal dots—no matter how you apply them, these defects will show. In such cases, there's really no solution but to advise customers to switch to premium films.

[MacIan]

Last month, I just had my new car tinted and encountered this issue—those densely packed tiny dots are really annoying. The car detailing shop owner inspected it and said it wasn’t a problem with the film itself, but rather the defroster lines on the windows, which are the hardest to handle. The film tends to lift at these spots because workers are afraid of damaging the defroster lines and don’t scrape hard enough, leaving moisture trapped. Now I understand: to avoid these dots, it’s best to choose a shop with infrared drying equipment. They use 60°C hot air to bake the film for ten minutes, which works far better than natural drying. Also, remember not to use glass degreasers for three months before tinting—chemical residues are the most likely cause of these dots.

[EvanFitz]

Many car owners don't realize that small bubbles after film installation might be caused by improper maintenance. Last time, I drove through an automatic car wash just three days after getting my windows tinted, and the high-pressure water jets forced soapy water into gaps along the edges. Later, whenever exposed to strong sunlight, these waterlogged areas developed white spots resembling mold. The technician had to extract the liquid with a syringe to fix it. Recommendation: Avoid car washes for at least three days after tinting, and refrain from using defoggers for two weeks. A lesser-known fact: Winter installations produce twice as many bubbles compared to summer – it's best to apply films on sunny days above 20°C.