Paste over wallpaper, such as: fiberglass or non-woven wallpaper, we do not recommend, this is at your own risk. Paste on a surface in which silicone is used.
A primer is always important to use because of the adhesion of the material. Walls in new-build homes have a strong “sucking” effect, they also absorb a lot of water in the adhesive layer. We therefore always recommend to use a good primer before you start applying thje pre-pasted wallpaper.