I used a spray adhesive, and it is both sides.
I had the same thought once I covered one side. I didn't want to see any of the silver, so I cut another piece that was big enough to cover what was showing. For that piece I used the spray adhesive and then any edges that weren't quite down, I used a glue gun.
I used a glue gun for the "tabs" that are there which are made of some ribbon I had laying around.
They look good from 7-10 feet, but if you get close they are a little janky. Good enough for me though, just to have the privacy and so far they are doing the job great. I can get closer pictures if you want to see them.