I have plastic rain gutters on the door in my craft room. I read some place on-line that they used hot glue to put them up. That didn't work, they'd fall off (4 of the 6). Then I used mounting tape, that only worked on a couple of them. I ended up just screwing them into the door. I did all of them, so I don't have to worry about them falling ever (and scaring me at midnight when I hear the crash!). Now they are up securley - love them!!!