Fully immerse each ModulArt square in clean, lukewarm water for 30 seconds using a wallpaper tray or even your kitchen sink.

Apply pasted side to a clean, smooth surface free from debris or grease.
When applying wall squares edge to edge, ensure that the arrows on the pasted side of the square all point in the same direction. Smooth square with a soft wallpaper smoother. Use a clean damp sponge to remove excess paste from wall squares.