Understanding The Basics of Car Window Tinting

GLASSTINT window tinting film provides various benefits focused on making the driving experience more secure and comfortable.

Terms You Need To Understand About Car Window Tinting Films

Window tinting film products have the ability to decrease heat, fading, protect your skin, save energy, improve your security, and it can eliminate glare completely. Let us focus on the terms and matters surrounding window tinting. Read about the history of window tinting here.

What is TSER, UVR, VLR, VLT, IRR, Glare Reduction and SHGC?

Automotive window tinting comes with some terms that you need to know. In this article, we will guide you through the different terms used in this industry to make your experience less daunting.


TSER (Total Solar Energy Rejection) is a metric used to measure the energy rejection of UV, infrared and visible light. An elevated TSER means that the film has a capacity to reject the whole range of sunlight including visible light and heat.

One of the ways to assess the capacity of the film is to compare it with other auto window tinting film that has the same visible light transmission or VLT since being darker means more light rejection and lighter means lower light rejection.

eg. Interactive charts in all of our products can show how different types of light are rejected by each VLT.


UVR or Ultra Violet Rejection is the percentage or degree of UV radiation that is deflected when passing through the film. Most window tinting films have this innate feature, but their ability to deflect can vary. If you care about your skin, search for 99%.

eg. All GLASSTINT window films have +99% UV Rejection (stopping all light lower than 380 nm)


Visible Light Reflectance (VLR) is the amount of light that penetrates the window film. A high level of VLR gives a mirror-effect. Generally, metal window tinting film has an elevated level of VLR that has a striking similarity to a glass.
e.g. This can be seen in our reflective window film GLASSTINT Sunset 10 that has a VLR of 16% as opposed to a matte window film GLASSTINT Rode 15 with a VLR of 4.8%.


VLT or Visible Light Transmission is the term that refers to the level of visible light that goes directly through the window film. A high degree of VLT simply means that more light can pass through which will allow you to have improved visibility. This is why every car must have window tinting film, read more here


Most companies use IRR or Infrared Rejection when determining the rate to reject heat. However, IRR is limited to measuring the IR component that can be rejected by the film. For instance, if an auto window tinting film has an IRR capacity of 65%, this means that it can deflect 65% of the infrared (with 35% of the infrared can pass through) and it doesn't explain what other types of light can pass through. So, although universal this isn't the only measurement that should be used.


Glare reduction measures the amount of reduction of VLT through the tinting film roll without a tint film to the one with installed window film.


Although not exact opposites, TSER and SHGC (Solar Heat Gain Coefficient) do have a correlation. If a film with a 0.6 TSER is would be close to 0.4 SHGC. This means 40% of the total heat is not rejected and instead allowed in by the film.