Sign up ×
Motor Vehicle Maintenance & Repair Stack Exchange is a question and answer site for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles. It's 100% free, no registration required.

As I recall, I read a news 10 years ago about putting some chemical on windshield which can somehow reduce the temperature inside a car.

Since I just bought my car, I want to try. Please help. Thanks

share|improve this question
H2O, when colder than the temperature of the windshield, will reduce the temperature inside the car. –  mac Apr 5 '13 at 19:59

2 Answers 2

I don't know of any chemical or coating there may be products which claim to do this but I am unaware of any.

However, you can get clear vehicle tinting which reduce close to 100% of UVA and UVB light this can reduce heating and temperatures in the summer.

This would be a one time application and you wouldn't have to worry about reapplying stuff every-time you wash your vehicle.

Lumar Auto Solar Control

ForumlaOne UV Shield

share|improve this answer

Its been around for ages. Its called window tint. You can either do it yourself or go to a tint shop to have it installed. It takes a few hours to install if you do it yourself. Faster at a tint shop. It'll also require 2 days to cure, which means you can't roll down your window for 2 days.

If you want to do it yourself, the companies Mike Saull linked to are good. Make sure you check with your local state or municipal to see what tint are legal (cops can use illegal tint as a probable cause to pull you over). is a good resource.

Once you've done that, just install the thing. is a good guide.

The benefits of having tinted windows are:

  • privacy cool
  • interior
  • UV protection
  • Shatter protection
  • Looks

Hope this helps.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.