Patching a Hole Around a Pipe

You’re looking at a water supply line underneath a pedestal sink in a powder room.
This hole is a little wide, and offers the wallpaper nothing to adhere to. In addition, there is no escutcheon (decorative plate) to hide the hole.

I took some special paper and cut a ” collar ” to fit around the pipe and also cover the hole.

I dipped the “collar” into Gardz . This is cool stuff. It soaks in to porous surfaces, adheres to surfaces, and dries hard.

Here is the patch in place. Once it’s dry, I’ll skim-float with joint compound (” mud “) and then sand smooth.
The finished product will be a smooth, intact surface for the wallpaper to adhere to, with only a tiny gap around the plumbing.