Window film, understood

A clearer view of window film.

Find clear answers about window tint for your car, home, workplace or boat. Understand heat control, glare, privacy and film ratings, then plan your next step.

Plain-language guidesSources you can inspectPrintable film reference

Start with your setting

What are you working on?

Different glass. Different priorities. Start with the guide that fits your project.

Make sense of the specifications

There’s more to a film than its shade.

Learn what the main measurements describe, why the test glass matters, and what to ask when two claims don’t line up.

Read the numbers, explained
VLT
How light or dark?Higher VLT means more visible light passes through.
TSER
How much solar energy?TSER describes rejection across the solar spectrum.
SHGC
How much solar heat enters?Lower SHGC means less solar heat gain.

The essentials, at a glance

A quick guide to the language

VLT / VT
Visible light transmission
TSER
Total solar energy rejected
SHGC
Solar heat gain coefficient

Each term answers a different question. The test basis matters, too.

Keep learning

A useful reference for window film.

Get clear definitions of the common ratings, understand the footnotes, and recognize what a performance sheet can and cannot tell you.

Read it here or print a copy to keep nearby.

Open the film reference

Good information starts with a clear question.

Start with the problem you want to solve, follow the relevant guide, and use the linked sources when you want more detail. Our editorial approach explains how the guides are written and checked.

How this resource is prepared