You can buy rolls of the window film in several different sizes, according to your needs. This small roll, which is 17.5 inches wide and 78.7 inches long, is only $10.98.

For his part, Boxer Wachler has some sage advice: "Take the guesswork out of whether cars have a high-level of UV protection by simply requesting a clear, non-tinted 100-per-cent blocking UV film ...

Most UV-blocking films work best when light hits the film at a 90-degree angle. But this isn't practical for window films, which receive light from the Sun at various angles throughout the day.