Legal window tinting San Mateo
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(2026) Legal Window Tint Laws San Mateo, California

San Mateo, California

San Mateo

California window tint laws: stay legal and drive comfortably

Drivers in San Mateo are subject to California's vehicle window tint rules, which set out how much light must pass through different windows. Understanding those rules before you choose a film keeps your car road legal and helps you get the look and comfort you want without a costly change of mind later.

Window Tint Law Guide for San Mateo California
Penalties

Consequences of Ignoring California Window Tint Laws

Tint that falls outside California's limits can bring financial and legal consequences. A correction notice is a common outcome, and it usually means putting the glazing back within the legal limits and showing that the issue has been resolved.

The Cost of Removing Non-Compliant Window Tint

Illegal film has to be removed before compliant film can go on, so the wrong shade often means paying twice. Very dark front glazing can also cut visibility at night. Confirming the limits before you book avoids both problems.

  • Fine: Up to $500 on the spot fine
  • Correction notice: proof of compliance may be required
  • Repeat offenses: further enforcement action is possible
  • More attention: non-compliant glazing can attract traffic stops
  • Insurance: check how modifications affect your policy

Legal Window Tint Limits in California

California sets tint limits by window position and by vehicle type, so a sedan and an SUV are not always treated the same way. The diagrams below outline the limits for passenger and multi-purpose vehicles. Visible light transmission describes how much light passes through the glazing, and it is separate from how much solar heat a film rejects, so a lighter film is not automatically a warmer one.

Passenger Vehicles

California Legal Window Tint

Passenger vehicles such as sedans and coupes have set limits for each window position, with the front glazing treated more strictly than the rear.

Windshield -

4 inches from the top

A non-reflective tint / sun strip, is allowed 4 inches from the top as long as it does not go past the AS-1 line on your windshield.

Front Side Windows -

70%

The California law allows 70% of light visibility for front side windows.

Rear Side Windows -

any shade

The California law allows any shade of light visibility for rear side windows.

Rear Back Windows -

any shade

The California law allows any shade of light in visibility for the rear window.

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Passenger Vehicle Window Tint Law Guide for San Mateo California

Passenger Vehicles

Hatchback, Sedan, Coupe, Station Wagon

PV

Multi-Purpose Vehicles

California Legal Window Tint

SUVs, vans and trucks are classed as multi-purpose vehicles and have their own limits for the windshield, front sides and rear glazing.

Windshield -

4 inches from the top

A non-reflective tint / sun strip, is allowed 4 inches from the top as long as it does not go past the AS-1 line on your windshield.

Front Side Windows -

70%

The California law allows 70% of light visibility for front side windows.

Rear Side Windows -

any shade

The California law allows any shade of light visibility for rear side windows.

Rear Back Windows -

any shade

The California law allows any shade of light visibility for rear window tint.

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Detailed Window Tint Law Graphic for Multi-Purpose Vehicle in San Mateo, California

Multi-Purpose Vehicles

SUV, Van, Truck

MPV

Check current rules with the relevant authorities before choosing a film.

2026 Kepler IR+

Kepler's new 2026 technology means enhanced heat rejection with lighter tint

Kepler IR and IR+ are nano-ceramic films designed around infrared rejection rather than darkness. Visible light transmission and heat performance are measured separately, so compare the exact film and shade with your dealer.

Kepler IR+

Nano-ceramic film specifications

Up to

98%

Heat Reduction

Up to

99%

UV Protection

Up to

96%

Glare Reduction

Review

Warranty terms

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Kepler Nebula film - 04% VLT

Nebula 04%

For the ultimate in privacy and heat rejection, our Nebula film offers designed darkness. Experience enhanced security and a stylish, upscale look with this premium film.

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Unsure which shade suits your car?

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Experience our films in a panoramic 360-degree view, aiding our San Mateo window tinting customers in selecting the ideal tint shade. Check out our rangehere.

What happens next?

Tell us your vehicle and the film you are interested in, and ask a local tinter whether they carry Kepler film or can get it.

Project Details

Car Window Tinting Quotes, San Mateo

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Why Choose Kepler

Why Choose Kepler Automotive Film

Kepler films are made for automotive use and supplied through a network of independent installers. Ask your dealer which Kepler range suits your vehicle and how each product is covered, so you know what you are getting before the film goes on.

How Kepler works

Kepler makes the film. Independent businesses fit it.

Kepler makes the film, not the tint job. Independent tinting businesses install window film. For a project in San Mateo, California, ask a local tinter whether they carry Kepler film or can get it, then arrange the work directly with that shop.

Start your quote request

Film availability and installation services vary by independent shop.

  • 01

    We make the film

    Kepler makes automotive and architectural window film, from everyday tint to nano-ceramic.

  • 02

    Independent businesses fit it

    Independent tinting businesses install window film. Ask a local shop whether they carry Kepler film or can get it.

  • 03

    Ask a local tinter

    Share your project details, then ask an independent local tinter whether they carry Kepler film or can get it.

Common questions about car window tint laws in California

Check the current official tint rules and enforcement guidance for your vehicle. If you receive a citation, follow the instructions on that notice and confirm any required action with the issuing authority. Do not rely on this page for a penalty amount or a prediction about the outcome.

Nearby

Window Tint Laws Near San Mateo

Review nearby city pages connected to San Mateo, California when comparing local tinting guidance and legal tint resources.

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