The S15 has the benefit of preventing onlookers outside from looking through your window while maintaining visibility from inside during the day. Its dark, reflective tint makes it difficult for unwanted eyes to see what's happening inside. The dark silver tint of the S15, which is rated to transmit about 18% of visible light, also helps reduce glare.

The effect of any daytime privacy window film will greatly depend on the lighting conditions, because the side exposed to more light will become more reflective and harder to see through. This is why the privacy effect works so well during the day, since the sun usually makes the exterior of your building much, much brighter than the interior. The use of curtains or blinds will be needed for nighttime privacy.

Good for homes and office buildings that are directly exposed to the sun which is the source of UV rays, the S15 window film provides an excellent UV blocking barrier. Being exposed to UV rays can cause skin problems such as premature aging skin and signs of wrinkles as well as eye problems. The S15 film rejects about 99% of the UV rays, helping to reduce fading on your precious furniture and pictures.