Ceramic vs Carbon vs Dyed
What separates the film types, and which differences you will actually notice.
The short answer
Dyed is the cheap one and it fades. Carbon does not fade and rejects moderate heat. Ceramic rejects the most heat and does not interfere with signals. Metallic rejects heat well but can interfere with radio, GPS, keyless entry and tyre sensors.
Dyed film
A dye layer between an adhesive and a protective coating. It is the cheapest option and it looks fine on day one.
The failure mode is well known: the dye breaks down under UV. That is what causes the purple film you see on older cars, and it is also what causes bubbling as the adhesive fails. In direct Pacific Northwest summer sun it is slower than in Arizona, but it still happens.
Reasonable for
Short-term ownership, or purely cosmetic darkening on a car you will not keep.
Carbon film
Carbon particles instead of dye. It does not fade to purple because there is no dye to break down, and it gives a flat black appearance rather than a slightly reflective one.
Heat rejection is genuinely better than dyed, and it does not block signals. It is the sensible middle option and for many drivers it is enough.
Ceramic film
Ceramic nanoparticles that block infrared while staying optically clear. This is where the meaningful heat rejection is, and the reason it is worth explaining properly:
- Rejects heat without needing to be dark. A 70% ceramic film can outperform a 20% dyed film on infrared rejection while looking nearly clear.
- No signal interference. Nothing metallic, so phones, GPS, keyless entry and tyre pressure sensors are unaffected.
- Does not fade. No dye to break down.
- Better clarity. Noticeably less haze at night than cheap film.
The honest catch
It costs more, and the difference is most obvious in sustained heat. Around here we get maybe a couple of genuinely hot months. Whether that is worth the premium depends on whether you park outside, how long you keep the car, and how much you dislike getting into a hot vehicle.
Metallic film
Very effective at heat rejection using a thin metal layer, and durable. The problem is that a metal layer is a radio-frequency shield. Interference with GPS, satellite radio, keyless entry and tyre pressure monitoring is a real and reported issue.
On a modern car with a lot of wireless systems, we generally steer people away from it. Ceramic does the same job without the trade-off.
Comparison
| Dyed | Carbon | Ceramic | Metallic | |
|---|---|---|---|---|
| Heat rejection | Low | Moderate | High | High |
| Fades or purples | Yes | No | No | No |
| Signal interference | No | No | No | Yes |
| Night clarity | Poorer | Good | Best | Good |
| Cost | Lowest | Middle | Highest | Middle–high |
What we would actually tell you
If the goal is looks and the budget is tight, carbon is the honest recommendation — it will not turn purple in two years. If the goal is a cooler car, ceramic is the only one of these that materially delivers it, and you do not have to go dark to get it.
Questions we get
Is ceramic tint worth it in the Pacific Northwest?
It depends on your situation. Fewer hot months than a desert climate, so the payback is slower - but if you park outside, keep cars a long time, or want heat rejection without darkness, it makes sense.
Will tint block my phone signal?
Only metallic film does that. Dyed, carbon and ceramic films do not interfere with phones, GPS, keyless entry or tyre sensors.
Why does old tint turn purple?
The dye in dyed film breaks down under UV. Films without dye - carbon and ceramic - do not do it.
How long does good film last?
Quality carbon and ceramic films commonly carry long manufacturer warranties against fading, bubbling and peeling. Ask us which film and what its warranty says before you buy.