California tint limits at a glance
- Windshield: non-reflective tint only on the top 4 inches (or above the AS-1 line if lower).
- Front side windows: minimum 70% VLT combined with factory glass. Factory glass alone is often 70–88%, so there is little or no room for dark film.
- Rear side windows: any darkness.
- Rear window: any darkness, as long as the vehicle has left and right outside mirrors.
- Reflectivity: film can’t be more reflective than a standard window.
- Colors: red, amber and blue tints aren’t permitted on the windshield or front side windows.
These rules come from California Vehicle Code §26708 and related sections. They apply to cars, trucks and SUVs alike.
What “VLT” actually means
Visible Light Transmission is the percentage of visible light that passes through the glass. A “5%” film is very dark (limo), “20%” is dark, “35%” is medium and “70%” is very light. Because the law counts glass and film together, a “70%” film on glass that’s already 80% ends up around 56%, which is not legal up front. We measure your glass with a meter before recommending a front-window film.
How to stay cool and legal
Darkness and heat rejection are different things. Dark dyed films block light but very little infrared heat. Ceramic and IR films target infrared, the part of sunlight you feel as heat. That’s why a nearly clear Ultimate IR film on your front windows can make a bigger comfort difference than a dark, cheap film. Pair it with darker ceramic film on the rear windows for privacy.
What we recommend for Fremont drivers
- Front sides: clear or very light Ultimate IR / ceramic (metered to stay legal).
- Rear sides & back: your choice of shade in ceramic or Ultimate IR, commonly 15–35%. See all window tint prices.
- Glass roofs (Tesla, etc.): light IR film. See our Tesla guide.
This guide is general information, not legal advice. Laws can change, so confirm specifics with the CHP or DMV.