Recent News
28 June 2026
50% vs. 70% Windshield Tint: What's Legal in Hawaii
Updated November 11, 2026
Thinking about 50% tint on your windshield? On Oahu, that's one of the most common questions we get at the counter, and the short answer is no. Here's what Hawaii's tint law actually allows on a windshield in 2026, how the 70% rule and the AS-1 line work, and how to cut heat on your front glass without failing a safety check.
Quick answer: 50% windshield tint is not legal in Hawaii. Below the AS-1 line, the glass and any film together must let through at least 70% of visible light. You can add a darker sun strip above the AS-1 line (or in the top four inches if there's no AS-1 mark), and you can cover the rest of the windshield only with a clear film that keeps the total at 70% or more.
The Law
What Hawaii Law Says About Windshield Tint
Windshield tint in Hawaii is controlled by Hawaii Revised Statutes §291-21.5. The statute says a vehicle's glass must meet Federal Motor Vehicle Safety Standard 205, then lists the few things allowed on top of that. For the windshield, those are:
| Area of the windshield | What's allowed |
|---|---|
| Top strip | Transparent sun-screening film along the top edge, as long as it doesn't go below the AS-1 line, or more than four inches down from the top if there's no AS-1 mark |
| Below the AS-1 line | Only transparent material that still meets Federal Motor Vehicle Safety Standard 205, which means the glass and film together must pass at least 70% of visible light |
| Lower corners | Signs or stickers within a seven-inch square in the lower corner farthest from the driver, or a five-inch square in the corner nearest the driver |
| Finish and color | No mirrored or highly reflective finishes that appear red, yellow, amber or blue from outside |
Hawaii updated the tint statute through Act 129, approved May 29, 2025. Our guide to Hawaii's tint laws covers the full set of rules for side and rear windows too.
The 70% Rule
Where the 70% Number Comes From
The 70% figure is federal. In a letter interpreting FMVSS No. 205, the National Highway Traffic Safety Administration explains that the safety glazing standard built into FMVSS 205 requires glass in areas "requisite for driving visibility" to have at least 70% light transmittance, and that any part of the windshield below 70% has to be marked by the AS-1 line. Hawaii's statute adopts that standard, so the 70% floor applies to everything below the AS-1 line on your windshield.
One detail trips people up: the 70% is measured on the finished windshield, glass and film together. Windshield glass doesn't pass 100% of light on its own, so a film labeled "70%" can drop the total below the limit.
Side by Side
50% vs. 70% Windshield Tint
| 50% film | 70% film | Clear film such as LLumar AIR 80 | |
|---|---|---|---|
| How dark it looks | Noticeably darker; about half the light is blocked by the film alone | Light shade | Virtually clear |
| Below the AS-1 line | Not legal: the total ends up far below 70% | Only if the finished windshield still meters 70% or more | Legal when the finished windshield meters 70% or more |
| Top strip above AS-1 | Allowed | Allowed | Allowed |
| Night driving | Darker view after sunset | Close to factory glass | Close to factory glass |
The LLumar AIR 80 windshield film we install meters at about 80% VLT on its own, which leaves room for the glass. You can watch it go on in our AIR 80 install video.
The AS-1 Line
How the AS-1 Line Sets Your Sun Strip
The AS-1 line is a small marking printed near the top left or right corner of the windshield by the glass maker. It shows where the shade band can end. In Hawaii, a darker sun strip can come down to that line. If you can't find an AS-1 mark, the strip can go no lower than four inches below the top of the windshield, measured from the middle of the bottom edge of the top molding. For photos and more detail, read what the AS-1 line is.
Inspection & Penalties
Safety Checks, Certificates and Fines
Safety inspection
Hawaii's required safety inspection includes a test of your glass and any tint against the tint statute.
Installer certificate
The installer has to give you a certificate stating that the film complies with the law. Keep it in the vehicle.
Removal
Anyone who violates the statute is liable for removing the non-compliant film.
Fines
Owners and installers can both be fined. Act 129 raised those fines in 2025, so check the current statute for the amounts.
Heat Without Darkness
How to Keep Your Windshield Cool and Legal
A darker windshield isn't the only way to block heat. Clear ceramic films are built to target infrared heat rather than visible light, so they can cut the heat coming through the glass while still passing Hawaii's 70% test. Pair a clear windshield film with a top strip down to the AS-1 line and legal tint on your side windows (at least 35% VLT, plus or minus 6%, under the same statute). Our guide to 35% window tint shows how that looks, and the best tint for Hawaii heat compares film types.
Our Process
How T&T Makes Sure Your Windshield Passes
01
Test sample
We stick a small sample of the film on your windshield.
02
Meter it
We measure the light passing through the glass and the sample together. If it reads below 70%, we don't install it.
03
Install
Our installers apply the film and the top strip, keeping the strip above the AS-1 line.
04
Meter again
We meter the windshield after installation and give you your compliance certificate.
FAQs
Hawaii Windshield Tint FAQs
Is 50% windshield tint legal in Hawaii?
No, not across the windshield. A 50% film lets through only half the light before you count the glass itself, so the windshield ends up well under the 70% that federal glazing rules require below the AS-1 line. Darker film is only allowed in the top strip above the AS-1 line.
Is 70% windshield tint legal in Hawaii?
Only if the finished windshield still measures at least 70%. Because the glass blocks some light on its own, a film sold as 70% can push the total below the limit. That's why we meter the windshield with a test sample before we install anything.
Can I tint my whole front windshield in Hawaii?
Yes, with a clear film, as long as the glass and film together still pass at least 70% of visible light. Dark tint is limited to the strip along the top.
How far down can a windshield sun strip go?
Down to the AS-1 line, the small mark near the top corners of the glass. If your windshield has no AS-1 mark, the strip can go no lower than four inches below the top of the windshield.
Will windshield tint be checked at my safety inspection?
Yes. Hawaii's required safety inspection includes a test to make sure the glass and any tint meet the tint statute.
Can I get a reflective or colored windshield strip?
Not a mirrored or highly reflective one that looks red, yellow, amber or blue from outside. Hawaii's 2025 update to the tint law prohibits those finishes.
Free Estimate
Get Your Windshield Done Right
T&T Tinting Specialists has tinted Hawaii vehicles since 1982. Bring your car to our Koapaka Airport shop at 3035 Koapaka Street, (808) 423-8468, or our Kaka'ako shop at 751 Pohukaina Street, (808) 596-8468, Monday to Saturday, 8 a.m. to 5 p.m. See our car window tinting options or get a free auto tint estimate.
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