Legal Window Tint: While there are no federal laws governing windshield tint, Texas does have window film regulations. What level of tint Texas allows varies depending on which window (front sides, rear sides, rear, windshield, etc) you are referring to.
Window tint percentage is measured by visible light transmittance (VLT), or the amount of light passing through the windows. “Limo tint”, for example, has a 5 percent VLT.
Most new vehicles come with factory tint already installed. You must account for this whenever adding a new tint. This is done by multiplying the percentages. Check out our page on current tint laws in Texas.
Most manufacturer’s tint will be no darker than 70 percent VLT. So, if you already have an 80 percent VLT and add a 30 percent to it, you will arrive at a 24 percent VLT (.80 x .30 = .24).