What is the strongest glue for billboards on the wall?

One is glass glue. It is easier to use and easy to tear off. It will not leave an offset mark. But you need to use a small amount of glue. Surface tape is used to fix it. The glass glue takes 3 hours to dry. There is also double-sided tape, but it is not easy to clean and scratch after being peeled off. There is also universal glue that can be applied to the wall after brushing it. But this is ruined The first is that after tearing off the cracked wax, there will be an offset that is difficult to remove