Join Date: Feb 2018
Thanked 7 Times in 3 Posts
Hm, not sure if an interior film would have any effect on exterior-side impacts (if that's what you were asking).
There are basically three (recently, four) brand name players in the windshield-film market: Llumar Air, 3M's Crystalline, and Huper Optik which is the most expensive. Suntek recently added a similar product which they call CoolSight but I don't know the specs on that one offhand. Each of the main trio have their pros and cons.
The Crystalline film actually rejects more heat than the Llumar, because it blocks infrared which the Llumar does not. But the the tradeoff is that it also blocks slightly more visible light, which in combination with the OEM window tint + the new 2017 tint laws in New York (which I assume you're in, as I am) drops it below legal limit. The Llumar 80 film JUST barely squeaks by, when metered.
Huper Optik's clear film is probably the best overall, but because it's actually a window (rather than auto) film it is a major PITA to install on any curved surface. That's why many tint shops either discourage or flat-out won't use it on front or back glass. It's also in a whole other league, $$$$$$-wise, than the others.
So overall the Llumar Air 80 seemed like the best choice. They also make a 90% VLT product but I did want as much "tint" as I could legally get away with.
When the tint/inspection law kicked in, I had to get the existing darker side window tint removed because I didn't want to have to spend the rest of my life trying to find an inspection station willing to risk their license by "passing" an illegal tint every year. It was hard enough to find a shop willing to just hand me the sticker instead of putting it onto the glass that (in my last car) had the film on the entire surface including that corner! I'd laminate the loose inspection sticker and also the registration sticker, tape them together side by side, and set them on the top of the dashboard in that drivers side corner. I learned my lesson, lol, so when I had the film put on the new Accord the tint shop left that corner film-free.