How Does Tinting a Window Reduce Heat?

If you've ever driven through the desert or gone out or a spin in one of the UAE's 50°C summers, you'll know just how hot your car interior can get. Air-conditioning is certainly one solution, but it takes its toll on the fuel tank and your wallet. Car window tinting is an excellent way to supplement your aircon and help you to keep cool, even on the hottest of days. But how does this modern miracle do what it says it does and which is the best kind of window tinting for the job? Let's have a look.

Thermal Rejection

At its most basic, car window tinting works by providing a barrier between the sun's rays and the car's interior. Most car window tint films are made from Polypropylene Terephthalate, which is a thermoplastic polymer resin. Because it's thermally stabilised, window tinting rejects thermal rays, which conduct heat. However, because the car window tint is 'spectrally selective', it doesn't block out the rays that deliver light – although it can minimise UV radiation's effects (such as the fading of upholstery and the triggering of carcinogenic melanomas).

Before the UAE reviewed its federal traffic laws to permit a 50 window tint or less, it was thought that car sunshades were the better option. This was later disproved, as tests showed that sunshades only reduced heat in the dashboard area - and only by around 2°C. When basic window tinting was tested, it was found that it offered a reduction of heat throughout the car by as much as 8°C. It's worth knowing that the tests were carried out using a fairly weak tint. Today, there are others available that are even more effective.

Which Percentage of Tint do I Need?

When choosing the percentage of tint for your car windows, it's worth considering why you need it. A 50% window tint will reduce the levels of light coming in and cut the rates of heat and UV-ray absorption. If you want things a little darker, perhaps for added privacy while driving, 35% car window tinting could be the way to go. At this level, the light reduction is considerably more, but so is the amount of heat reflected. At around 20%, things start to get a lot darker, and it can even be difficult to see, particularly in low-lit areas. Car tinting between 35% and 50% tends to be the option most drivers go for.

Which Material is Best?

3M Ceramic window tinting are good places to start if you want things a little cooler. ceramic tint has the edge, reducing it by up to 60%. However, if you're looking to keep things really cool, you should be looking at a 3M carbon tint. Also known as infrared rejection films, they significantly block the rays that conduct heat, with results as high as 91%. As there's no metal added to the film, a carbon tint won't interfere with your car radio or your passengers' mobile phones.

If you have any queries about 3M car window tinting or are looking to replace your existing car window tint, drop into one of our Fastfit service centres and talk to our friendly team. They’ll be able to answer your questions and help you decide which is the best tint for your travels.