Window Tint Guide: Compare
Is Ceramic Tint the Same as "Infrared" Tint?
Shop for tint for more than a few minutes and you will see ceramic, nano-ceramic, IR, infrared, IR-blocking and IR ceramic used almost interchangeably. Some quotes list a ceramic film and an infrared film at two different prices, which makes it sound like two different technologies.
Mostly, they are the same family. This guide explains what the infrared label usually means, why one film can be advertised with two very different IR numbers, and the handful of questions that cut through the marketing so you can compare films honestly.
The short answer
Usually, yes and no. Ceramic tint uses nano-ceramic particles that absorb and reject infrared heat, so all ceramic film is infrared-rejecting. Infrared or IR tint is typically a higher-grade ceramic with a heavier load of those particles, so it rejects more infrared. LLumar says exactly this. To compare two films, ignore the label and ask for total solar energy rejection and how the IR figure was measured.
Key points
- Infrared tint is not a separate technology from ceramic in most product lineups; it is usually the stronger tier of ceramic.
- A single film can carry two very different IR numbers depending on how infrared rejection is defined and measured.
- Total solar energy rejection (TSER) is the better single number for comparing how much heat a film keeps out.
- Both ceramic tiers are nonmetal, so they do not interfere with phone, GPS or toll tag signals the way metallized films can.
The short version
What Infrared Tint Usually Means
LLumar answers this question on its own ceramic tint page. It says all ceramic tint can reject the sun's most heat-causing infrared rays, and that the newest ceramic films have more concentrated nano-ceramic particles that push infrared blocking higher. Because of that, LLumar says, these newer ceramic films are sometimes called infrared tint or IR-blocking film.
So when a lineup shows a ceramic film and an infrared film, the honest translation is usually good ceramic and better ceramic. LLumar's own ceramic lineup works this way: CTX is described as great heat rejection, IRX as advanced nano-ceramic technology that specifically targets infrared heat, and the FormulaOne ceramic films sit above both. The infrared name tells you which end of the ceramic range a film is on, not that it works on a different principle.
Background
Why Infrared Matters for Heat
Sunlight reaching your car is a mix of ultraviolet, visible light and infrared. You cannot see infrared, but you feel it as warmth on your skin through the glass. Visible light also carries heat, which is why darker films feel cooler, but darkness is limited by law. Infrared is the part a film can block without making the glass darker.
That is the whole appeal of ceramic. Nano-ceramic particles are chosen to absorb and reject infrared while letting most visible light through, so a moderate, legal shade can still cut a meaningful amount of heat. In South Carolina, where film on most regulated windows must leave at least 27% combined light transmission, that trick matters more than in states where you can simply go darker.
The trap
One Film, Two Very Different IR Numbers
Here is where marketing gets slippery. Infrared rejection can be defined in more than one way, and the numbers are not interchangeable. LLumar's published spec sheet prints two infrared columns side by side for each film. IR energy rejection (IRER) counts the solar infrared from 780 to 2500 nanometers including energy the film absorbs and re-radiates into the car. Selective IR rejection (SIRR) counts only the infrared that is not directly transmitted through the glass.
The difference is large. For IRX 35, LLumar lists 60% IR energy rejection and 87% selective IR rejection. For CTX 35, it lists 48% and 69%. Same films, same lab, same shade, two honest numbers each, measuring different things. A shop advertising 87% IR rejection and another advertising 60% could be describing the very same product.
Neither IR number tells you the full heat picture, because infrared is only part of the sun's energy. LLumar lists total solar energy rejection of 54% for IRX 35 and 48% for CTX 35. That is the number that combines UV, visible light and infrared into one figure, which is why it is the better starting point when you compare films.
All figures are LLumar's published data, measured on single-pane clear glass under NFRC guidelines. LLumar notes that actual performance varies with glass type.
Definitions
The Spec Sheet Terms That Matter
- TSER (total solar energy rejected)
- The share of all incoming solar energy, UV through infrared, that the film and glass keep out of the car. The best single number for comparing heat rejection between two films at the same shade. Reading a tint spec sheet
- IRER (IR energy rejection)LLumar's definition
- Infrared rejection across 780 to 2500 nanometers that also counts heat the film absorbs and re-radiates inward. LLumar describes it as a more complete measure of the infrared heat you experience.
- SIRR (selective IR rejection)LLumar's definition
- The share of solar infrared that is not directly transmitted through the glass. It runs much higher than IRER for the same film, which is why it is popular in advertising.
- IR at a stated wavelength or band
- Any IR figure that names a narrow range rather than the full solar infrared band describes only that slice. It can be accurate and still overstate how much heat you will feel. Ask for the range behind the number.
- VLT (visible light transmission)
- How much visible light passes through. This is what South Carolina regulates, together with the factory glass, and it is separate from heat rejection. How VLT math works
Not metal
Ceramic, Infrared and Your Electronics
One genuine difference between film families is metal. Metallized films use a thin metal layer to reflect heat, which gives them a slightly shiny look and can interfere with radio signals. LLumar describes its metallized tint as having a slightly reflective look, and describes its CTX ceramic film as offering heat rejection without blocking electronic signal transmission.
Ceramic films, including the infrared tier, get their heat rejection from nonmetal particles, so phone signal, GPS, keyless entry and toll transponders behave as they would with untreated glass. If someone offers you an IR film that turns out to be metallized, that is a different product with different trade-offs, and it also needs to stay nonreflective to meet South Carolina law.
Ask this
What to Ask for When You Shop
Ask for the brand and product line
A real quote names the manufacturer and the film line, not just ceramic or IR. That lets you look up the spec sheet and the manufacturer's warranty yourself.
Compare TSER at the shade you'll actually get
Heat rejection changes with shade. Compare two films at the same darkness, and at a darkness that is legal for your windows.
Ask how the IR number is measured
Is it energy rejection that counts re-radiated heat, or selective rejection that does not? Over the full solar infrared band or a narrow slice? If nobody can tell you, treat the number as marketing.
Confirm it is nonmetal and nonreflective
Ceramic should not affect signals or look mirrored. South Carolina requires film to be nonreflective and bans red, yellow and amber.
Check the legal shade first
On sedans, coupes and pickups, side and rear windows must stay at or above 27% combined light transmission. A better film at a legal shade beats a darker film that earns you a ticket.
Our films
How This Applies to What We Install
At The Auto Show we install two LLumar films: LLumar Carbon from $125.99 and LLumar Ceramic from $199.99, both priced for the two front side windows. The ceramic film uses nano-ceramic particles to reject more of the sun's infrared heat, so the cabin stays cooler without needing the darkest shade. Both block UV and reduce glare, and LLumar rates its films to block up to 99% of UV rays.
If you are comparing our quote with one that lists an infrared film, ask the questions above and compare like for like. We check the legal shade for your vehicle before installing and apply South Carolina's certificate of compliance sticker to each tinted window.
| Film (LLumar) | Construction | TSER | IR energy rejection | Selective IR rejection |
|---|---|---|---|---|
| ATC 35 | Color-stable dyed | 35% | 22% | 29% |
| ATR 35 | Metallized | 44% | 40% | 53% |
| CTX 35 | Ceramic | 48% | 48% | 69% |
| IRX 35 | Infrared-rejecting ceramic | 54% | 60% | 87% |
Source: LLumar Window Film Performance Data, measured on single-pane quarter-inch clear glass. Shown to illustrate how the metrics differ; real results vary with your car's glass.
Want Heat Rejection Without Going Too Dark?
We'll check what's legal on your vehicle and walk you through LLumar Carbon and LLumar Ceramic so you can pick the film that fits how you drive.
Common questions
Is IR tint better than ceramic tint?
IR tint is usually a higher grade of ceramic, so within one brand it typically rejects more heat at the same shade. Between brands, the label means little on its own. Compare total solar energy rejection at the same shade, and ask how each IR figure was measured, before deciding one is better.
Why do tint shops quote such different IR rejection numbers?
Because infrared rejection can be measured in different ways. LLumar's own sheet lists IRX 35 at 60% IR energy rejection and 87% selective IR rejection, two accurate numbers for one film. Some figures also cover only part of the infrared band. Always ask what range and method a number uses.
Does infrared tint look different from regular ceramic tint?
Not usually. Both are typically charcoal and nonreflective, and at the same shade they look very similar from outside. The difference is in heat you feel, not in appearance. If a film looks mirrored, it is likely metallized rather than ceramic, and reflective film is not allowed in South Carolina.
Do heat lamp demos prove a film's IR rejection?
They show that a film blocks the output of that lamp, which can be a useful feel test. A lamp does not reproduce the full solar spectrum, so it cannot tell you a film's total solar energy rejection. Use a demo as a rough comparison and rely on published spec sheets for the numbers.
Sources
- Elite Heat Rejection with Ceramic Window Tint, LLumar (https://llumar.com/en/tint/ceramic/), accessed October 2026
- LLumar Window Film Performance Data (LL0116NAEN), Eastman Performance Films (https://llumar.com/content/dam/eastman/performance-films/llumar/documents/LL0116NAEN_AutoSpecs_screen.pdf), accessed October 2026
- Enhance Comfort and Protection with LLumar Automotive Tint, LLumar (https://llumar.com/en/tint/), accessed October 2026
- S.C. Code Ann. § 56-5-5015, South Carolina Legislature (https://www.scstatehouse.gov/code/t56c005.php), accessed October 2026
- Automotive Window Tint Frequently Asked Questions, LLumar (https://llumar.com/en/resources/automotive-window-tint-frequently-asked-questions/), accessed October 2026
Prices on this page are The Auto Show’s published starting prices. Film ratings and warranty terms come from the manufacturer. This guide explains South Carolina law in plain words; it is not legal advice.