I have a buddy who will tint your car with Huber Optik. It's a German film that is ceramic based, not metalized. It has better heat rejection and is lighter in color than 35% metalized film. Huber Optik offers a 90+ % heat rejectin film. I have it on my wifes cars and you can really feel the difference. The only draw back is that is very expensive.

 

What's the difference in price? I'd love something that keeps the heat out better.