


The red stripe you see is plastic “Danger” tape from the home improvement store. You can also use yellow “Caution” tape. Some installers use painter’s plastic cut into strips … although I find it too flimsy. I put this on the back / pasted side of my wallpaper strips to keep paste off the ceiling, woodwork, etc. And, as you see to the left of the top photo, when you bring a strip of wallpaper up against another strip, such as in your final corner, the plastic tape will prevent paste from transferring onto or staining the other strip of wallpaper.
After I make my trim cuts, I remove the excess wallpaper and the plastic tape – making sure to get the parts on both sides of my cut.
Now the paste can reach the wall surface, and adhere the wallpaper securely, with no paste residue left on the ceiling, molding, or wallpaper.