The California windshield rule
Vehicle Code section 26708(c) allows transparent material on the topmost portion of the windshield if its bottom edge is at least 29 inches above the undepressed driver's seat, it isn't red or amber, it has no opaque lettering, and it doesn't reflect more glare than the untreated glass. It's often described as "the top 4 inches" or the area above the "AS-1" mark, but the 29-inch line is the legal test. See the full California tint law guide.
Sun strip, factory shade band, or full film?
| Option | What it is | California status |
|---|---|---|
| Sun strip (visor strip) | Film strip across the top of the glass, inside | Allowed at the top, above the 29-inch line; not red or amber |
| Factory shade band | Tinted band built into the glass | Came with the car; a matching replacement windshield can include it |
| Clear full-windshield film | Near-clear infrared-blocking film over the whole glass | Not clearly permitted except under the medical provision for clear UV film; ask before buying |
Sun strips around cameras and sensors
On many newer cars the forward camera, rain sensor and light sensor sit in the top center of the windshield, inside a dotted dot-matrix area. A good installer cuts the strip around that housing so nothing blocks the camera's view. If a strip is applied over the camera area, lane-keep or automatic braking may throw a warning.
After a windshield replacement
An aftermarket strip leaves with the old glass. If you're replacing the windshield, have the new strip applied after the urethane has set and any camera calibration is done. More on the replacement itself: windshield replacement in Brentwood.
What it usually costs
| Sun strip | $50–$100 |
|---|---|
| Full-windshield film (where lawful) | $150–$300 |
Published national ranges, not a quote. The provider confirms your exact price before any work. Sources: LM Car Detailing (2026). How we use price data
General information, not legal advice. Statute text: California Vehicle Code 26708.
Common questions
How far down can a windshield sun strip go in California?
Vehicle Code 26708(c) sets the limit: the strip's bottom edge must be at least 29 inches above the undepressed driver's seat. Many installers describe this as "the top 4 inches" or use the AS-1 mark as a guide, but the legal test is the 29-inch line. Anything lower is a violation.
Can I put clear heat-rejecting film on my whole windshield?
Many shops sell it, but California's general rule only allows the top strip. The law separately allows clear, colorless UV-blocking film for drivers with a qualifying medical certificate. Outside that, full-windshield film is not clearly permitted, so treat claims that it's always legal with caution.
Will a new windshield come with a sun strip?
Some windshields have a factory shade band built into the glass, but an aftermarket film strip you added isn't transferred. It has to be reapplied on the new glass.
Does a sun strip interfere with the forward camera?
It shouldn't block the camera if it stays above the camera's viewing area. On many cars the camera sits within the top few inches, so the installer trims around the camera housing and the dot-matrix area.
Related services and guides
- California Tint LawsHow dark can car tint be in California? Legal VLT for every window, the real windshield-strip rule (29 inches, not 4), medical exemptions and tint tickets.
- Window TintingLegal car window tint in Brentwood, CA: ceramic and carbon film, shades that pass California's 70% front-window rule, windshield strips and tint removal.
- Windshield Repair & ReplacementMobile windshield repair, replacement, ADAS calibration, side and back glass, and legal window tint in Brentwood, CA and East Contra Costa.
- Tint Cost GuideTypical prices for dyed, carbon and ceramic car tint by vehicle, plus sun strips and old-tint removal. Published ranges, explained.