Some frosted glass sprays can handle the outdoors, but most of them aren't built for it. Sprays made for exterior use will say so clearly on the label. Anything marked “interior use only” can't hold up against rain, UV exposure, or changing temperatures without peeling, fading, or yellowing. Outdoor-rated sprays are typically more durable, but even then, proper prep and application matter. Before spraying anything outside, double-check the product instructions. If it doesn’t specifically mention exterior use, skip it. 

Window security film won’t prevent break-ins or stop your window from shattering from impact during extreme weather like hurricanes or tornadoes. However, applying security film is relatively inexpensive, and it can make breaking into your home significantly harder—often hard enough to deter burglars entirely—and keep your window from shattering on your floor after impact. For these reasons, window security film is often a worthwhile investment that helps protect your property.

The ideal thickness of window film depends on various factors and specific needs. Thicker films generally offer increased durability and enhanced security benefits. They are also typically more effective at reducing heat and blocking UV rays. However, thinner options may be preferable for some applications, such as decorative or privacy films. Thinner films are easier to apply and provide adequate privacy without compromising visibility. Ultimately, the best thickness of window film will depend on your specific requirements, desired benefits, and the recommendations of professional installers.

The costs range from $5 to $15 per square foot, depending on the film type, UV protection level, and labor.