Nursery Wallpaper Borders Is It Necessary To Use A Paste Activator To Put Up A Pre-pasted Wallpaper Border?

Is it necessary to use a paste activator to put up a pre-pasted wallpaper border? - nursery wallpaper borders

I have a limit in our nursery and bought a pre-glued A. Is it necessary to use paste or activator to save water? Since the baby will grow out of the room, but I do not like in 10 years maybe 5th