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How does two-way window film work?

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Quick Answer

Two-way window film can work in a variety of ways including as a sunscreen against harmful solar radiation and for the reduction of the heat and light levels that enter through glass, notes JohnsonWindowFilms.com. Two-way window film has many applications such as for homes, automobiles and commercial buildings.

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Full Answer

Untreated window glass can allow nearly 90 percent of solar energy to enter a home or vehicle, states JohnsonWindowFilms.com. The different components of sunlight, such as ultraviolet radiation, heat and light, can affect comfort levels in a home. Two-way window film can significantly reduce these harmful, uncomfortable effects of solar energy.

Window film is a self-adhesive sheet of Mylar polyester film that can come in different types such as dyed or reflective metallized film. Dyed film is non-reflective and useful for solar radiation, while metallized or non-reflective film can both absorb and reflect solar radiation that passes through glass windows.

There also is nano-ceramic window film, which can improve an automobile window's performance and quality, notes 3M.com. However, because dyed films only absorb solar energy, metallized and nano-ceramic window films can be more effective window treatments. Window film also often comes with a scratch-resistant coating.

Window film can block nearly 99 percent of UV rays and reduce solar heat up to 82 percent, reveals JohnsonWindowFilms.com. For this reason, window film can also help in the reduction of glare and the fading of home furniture or furnishings such as carpets. Window film also can offer additional privacy in homes or automobiles.

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