Your wallpaper installer should determine the best method and paste to use depending on the type and conditions of the walls where it is to be applied to and the type of substrate of the paper being used. *If any of the paste accidentally gets on the pattern side of the wallpaper Remove the paste as soon as possible while it is still wet, and use a damp cloth or sponge to gently blot up the excess. Do not scrape or use an abrasive action as this may damage the wallpaper.