Question about Fix-o-moll Wall door buffer

These wall-mounted doorstops can be fixed to a plastered surface, but are generally glued in place. These doorstops are designed to be glued to the wall without the need for screwing or drilling, which means they can be fixed securely and removed without leaving any marks. However, for a plastered surface, it is important that the plaster is clean, dry and sufficiently smooth to ensure good adhesion of the adhesive. If the plaster is very rough or crumbly, the bond may be less effective.