How to choose window tint

Shade and heat are two different things

This is the single most useful thing to understand before you choose, so it goes first: how dark a film looks and how much heat it rejects are not the same measurement.

A cheap dark film can look aggressive and still let a lot of heat through. A higher-grade film that looks comparatively light can cut significantly more of it. Heat comes largely from infrared energy, which is invisible — so your eyes are a genuinely bad instrument for judging how well a tint is going to work.

If your actual complaint is “this car is unbearable in July,” the answer is usually a better film, not a darker one.

What VLT means

VLT stands for visible light transmission, written as a percentage. It is the share of visible light the film lets through — so lower is darker. A 5% film is very dark; a 70% film is barely visible to look at.

Two things worth knowing. First, the number describes the film, not the finished window — most factory glass is already slightly tinted, so the combined result is darker than the film’s number alone. Second, quoted percentages are close to but not exactly what any individual roll measures.

Film types, in plain terms

• Dyed — the entry point. Gives you shade and privacy, blocks the least heat, and is the most likely to fade or turn purple over the years.
• Metalized — uses a fine metal layer to reflect heat. Effective, with a slight sheen, and the metal can interfere with radio, GPS, keyless entry and tire-pressure sensors on some vehicles.
• Carbon — a solid middle ground. Good heat rejection, a flat non-reflective black that most people like, no signal interference, and it does not fade the way dyed film does.
• Ceramic — the top of the range. The best infrared rejection for a given shade, no signal interference, and stable over time. It is the one to look at if heat rather than looks is the reason you are here.

Those are film categories, not products — what is actually available and what suits your vehicle is worth talking through directly.

Texas has rules about this

Texas regulates how dark the front side windows and windshield can be, and there are separate provisions for medical exemptions and for the rear glass on different vehicle classes. The limits are specific enough that guessing is a bad idea, and a tint that is not legal is a tint you may end up paying to remove.

Bring it up when you book. Getting the front windows right for the current rules and putting the darker film where it is permitted is a normal part of planning the job — not an afterthought.

If your vehicle already has tint

Old film has to come off before new film goes on, and removal is real work, particularly on rear glass with defroster lines running through it. Bubbling, hazing, a purple cast or edges that have started lifting are all signs the existing film is at the end of its life.

Mention existing tint when you ask for a quote, and say roughly how old it is if you know. Removal is part of the job and it is better priced in from the start than discovered on the day.

What to send when you ask

Your vehicle’s year, make and model, which windows you want done, whether there is film on it now, and — most usefully — what you are actually trying to fix. “It cooks in the afternoon,” “I want more privacy in the back,” and “I want it to look right” lead to three different recommendations, and the answer is better when we know which one you are.

This guide expands on a question from the window tint page. R&S Customs is opening soon in Spring, Texas — call or text (713) 960-2211 to talk about your vehicle.