Do you want to put on your car windows tinted foil. I am gone show you what is the difference between a good foil and a bad one.
On a good foil warranty is 12 years, after being mounted on the car. Top car manufacturers film LLumar and 3m.
Be careful where you mount the foil or where do you purchase, there are many fake on the market do not buy from aliexpress.
Hear is a clip with the difference between a Llumar film and a fake one. The test is made with two glasses, two ice cubes, an ultraviolet lamp and of course a fake and a good film. See below movie and you will understand.