I put window tint on the inside of my rear window. I bought it at Menards. I'd have to check in my trailer on the box for the name of the stuff, but it has no adhesive & can be removed if you want, at any time. They have all the supplies there, including spray (to make the window slippery), trimmer, and a squeegie. It came out very nicely. My windows were terrible & it took a lot of work to get the old stuff off (with a razor blade). I didn't want to put anything on them again that would be so difficult to remove if I wanted to take it off. I'll check on the name tomorrow if you want.
1964 Bambi II
1988 Avion 32S