Window Film Technical FAQs

What are Window Films?

Automotive window films are applied to windows to provide a more comfortable driving experience. Window Films are not just tint. They are not only designed to block unwanted visible light but they are made to block the sun’s harmful ultraviolet light and infrared energy.

Why do I need Window Films? What are the benefits?

Window films not only reduce glare and unwanted light, window films are made to reduce heat from entering your vehicle, providing you with a more comfortable driving experience. Reducing heat also reduces the need for cooling, saving energy, which Is specially important for electric vehicles. Window films are also made to block ultraviolet rays, which can cause skin damage like skin cancer and cause your items to fade.

Other benefits of window films include style, increased safety, and privacy.

What is the difference between Window Film and Window Tint?

Window films and window tint are used interchangeably in the film industry. However, they are not same. Window Tints are mainly made to change the color of windows or block a certain amount of visible light from passing through. On the other hand, other films offer other benefits such as heat rejection and UV protection that may or may not include a color change. These are collectively called window films.

What are the different types of Window Films?

Window films types typically differ in their properties. In the automotive industry, window films are classified by their heat-rejecting additive. Window film types include metallized or high performance (HP) films, carbon or color stable (CS) films, ceramic films, and multi-layer films.

What are High-Performance Films?

High performance films use thin layers of metal to reflect heat away from your vehicle, effectively block heat from entering your vehicle. They are low-cost window films that provide optimum heat rejection.

However, because of the metal material, these films can cause signal interference with your devices such as your phones and GPS.

STEK offers ICY series, our metallized film made with minimal signal interference and the highest clarity. Learn more about our ICY series here.

What are Carbon Window Films?

Carbon films use carbon particles that absorb heat, blocking heat from entering your vehicle. Carbon films provide a good These films also utilize carbon as a colorant, providing a charcoal color that is popular in the market. The color that carbon provides also do not fade over time, and that’s why these films are also called color stable films.

A good point of carbon is that they do not interfere with signals, which can be advantageous for most drivers.

STEK offers ACTION series, our carbon window films with a charcoal tone and no signal interference. Learn more about our ACTION series here.

What are Ceramic Window Films?

Ceramic window films use different ceramic materials to absorb heat, blocking heat from entering your vehicle. Ceramic films provide high levels of heat rejection (up to > 90%) while providing no signal interference. Most premium films use ceramic materials to block heat.

STEK currently offers SMART series. Learn more about our SMART series here.

What are Multi-sputter Window Films?

Multi-sputter window films use mulilayers of thin film to reflect heat away from your vehicle. Multi-sputter window films usually provides the best heat rejection levels, up to 99% IRR.

However, a downside to these films is their signal interference with wireless devices such as your cellular phones

STEK currently offers VISION 70s, our multi-sputter film.

What are Graphene Window Films?

Graphene films utilizes graphene, an innovative material designed to increase the heat conduction of the films. This helps heat to spread across and go out of the film faster, optimizing the heat rejection properties of the films’ additives.

Currently, STEK is the only company offering graphene films with our NEX series.

What do the different shades of window films signify?

Window Films come in different shades, which mainly differ for the amount of light allowed through the films. The shades are usually differentiated through their visual light transmittances (VLT) values.The lower the VLT, the darker the film.

What happens if I scratch the film?

Window films are made with a hard top coat that resists light scratches. However, they can still be prone to scratches especially by tools. Once scratches, these scratches do not disappear.

Does Blocking UV Rays Help Prevent Fading And Deterioration?

Yes. UV rays not only can cause skin damage like skin cancer, they can fade and deteriorate your dashboards, fabrics, and other interior surfaces.

Do clear window films provide the same benefits as darker films?

Generally yes. The VLT or shade of the window film does not fully dictate the benefits you will receive. Regardless of shade, STEK window films are designed to block heat and provide UV protection. The different shades mainly provide difference in privacy.

Why do the reported UVR, VLT, IRR, and TSER values differ from the values measured by our transmission meters?

The measured values depend highly on the machine’s sensitivity and the range which the values were taken.
This means that reported values can vary greatly depending on a number of factors and that values may not be accurate.

Why are some films blue? Why are some black?

The film tone mostly depends on the dyes or heat rejecting additives that is included in the film. Carbon-based films usually have a charcoal-colored tone, while ceramic-based films usually have blue-colored tone. Other colors are also possible depending on the added dyes.

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