Ceramic vs Carbon Tint in Texas Heat
· 6 min read
The short answer
Ceramic wins in Texas heat, and it wins by the most at exactly the shade Texas forces you into. Carbon's infrared rejection falls as the film gets lighter — about 62% at 5% VLT down to about 32% at 50%. Ceramic holds roughly 70–75% at every shade. On the 35% front window Texas requires, that's about 73% infrared rejected versus about 42% — same look through the glass, very different car in August. Carbon is still the right call if you're going dark and parking in a garage.
Darkness and heat are two different things#
This is the single most common misunderstanding we hear, and it costs people money in both directions. How dark a film looks is visible light transmission (VLT). How much heat it stops is infrared rejection and total solar energy rejected. They are not the same measurement and they do not move together.
A light ceramic can block more heat than a much darker carbon. That surprises people, and it's the whole reason the film grade matters more than the percentage you pick.
The numbers at the shade you have to run#
| Film | Infrared rejected | Total solar heat | Glare |
|---|---|---|---|
| Carbon (HiTek Carbon IR) | ~42% | ~41% | Not rated |
| Ceramic (HiTek Ceramic IR) | ~73% | ~49% | ~65% |
| Ceramic XR (SunTek Evolve) | ~93% | ~57% | ~65% |
Why the gap widens as film gets lighter#
Carbon does its work partly through darkness, so taking the darkness away takes the performance with it. Ceramic uses particles tuned to absorb near-infrared while passing visible light, so it keeps rejecting heat even when you can see straight through it. That's why SunTek Evolve at 70% — near-invisible glass — still rejects more heat than a 5% carbon that looks like limo tint.
Which should I get for a daily driver in Georgetown?
Ceramic, if the car parks outside. You are legally required to run more than 25% on the front sides in Texas, which is exactly where carbon has given up most of its heat performance. Ceramic holds its number there.
Is carbon a bad film?
No. It's colour-stable, it never turns purple, and at 20% and below it blocks real heat. It's the right film for someone who wants a dark, matte factory look on a car that sleeps in a garage. It's the wrong film for someone who wants a cool car and a legal front window.
Will ceramic tint block my phone signal or toll tag?
No. Older metallic and some hybrid films interfere with cell, GPS, radio and toll tags because they contain actual metal. Every film we carry is non-metallic, so signal passes through normally.
