Top window tint brands in the market today include ClearPro, 3M, LLumar, SolarGard and Huper Optik. Each offers standout product lines. For instance, ClearPro's window tints are known to be highly durable, very clear and have the ability to reject heat effectively.

In short, yes, window film really does work. Although window film isn't magic, and if your windows suffer from air-leak problems or the insulation in your house isn't up to a good standard, window film won't solve your heat retention problems.

Tints at the darker end of the spectrum can lower your visibility in low-light conditions, making it riskier to drive at night. A 50% film is ideal if you want sun protection and don't care as much about privacy. For the best visibility-to-privacy ratio, choose a 35% film.

While solar film will help reduce heat and reduce glare in your home or office, it doesn't provide any added privacy. If you are looking for both privacy and cooler rooms, solar film probably isn't the answer. Reflective window film on the other hand might be.