Why Does Window Tint Turn Purple? Causes, Fixes and How to Prevent It
Window tint turns purple because the dyes in dyed film break down under years of UV light and heat. The black and yellow dyes fade faster than the blue and red ones, leaving a purple tint. It is a sign the film is at the end of its life and usually also blocks less heat. Purple film cannot be fixed; the solution is to remove it and install new film. Carbon and ceramic films do not turn purple.
Dyed window film gets its color from layers of dye mixed into the film or adhesive. Over time, UV rays and heat break the dye molecules apart. Different dyes fade at different speeds, which is why the color shifts instead of simply getting lighter.
What Causes Purple Window Tint?
- Dyed film: the main cause; dyes are not stable in long sun exposure.
- Sun and heat: cars parked outside in hot climates turn purple faster.
- Low-quality film: cheaper dyes and adhesives fail sooner.
- Harsh cleaners: ammonia can speed up damage. See how to clean tinted windows.
Can You Fix Purple Tint?
No. Once the dye has broken down, there is no way to restore the color. Purple film often also bubbles as the adhesive fails. The only fix is to remove it and install new film. Follow how to remove window tint or ask a tint shop.
Films That Do Not Turn Purple
| Film | Turns purple? | Why |
|---|---|---|
| Dyed | Yes, over time | Uses dyes that fade |
| Metallic | No | Color comes from metal particles |
| Carbon | No | Carbon particles are stable |
| Ceramic | No | Ceramic particles are stable |
See ceramic vs carbon vs dyed tint and how long window tint lasts for more detail.
Is Purple Tint Illegal?
Faded film itself is not usually illegal, but bubbles and haze can block your view, and some states fail inspections when film is damaged. If the film was illegally dark to begin with, it is still illegal. Check our window tint laws by state guide.
- Pay a little more for carbon or ceramic so you only tint once.
- Ask for a warranty that specifically covers color change.
- Use a sunshade when parked to slow down fading on older film.
- Replace purple film before it bubbles, when it is easier to remove.
Purple window tint is dyed film whose dyes have broken down from UV and heat. It cannot be repaired, so remove it and install new film. Carbon, ceramic and metallic films do not turn purple, so choose one of them for a long-lasting result.
Purple Window Tint FAQs
Often a few years, sooner in hot, sunny areas.
No. The old film must be removed first or the new film will not bond properly and will look bad.
No. Ceramic film uses stable particles instead of dyes.
Less than when new. Faded dyed film blocks much less heat and glare.
Many quality films include color stability in their warranty; cheap films often do not.
- Purple = dyed film breaking down.
- Caused by UV and heat.
- Cannot be fixed; replace it.
- Carbon and ceramic never turn purple.
