The stickers cannot be mounted on the walls painted with paint containing Teflon or acrylic paint.
Please make sure before ordering that the paint on the wall where you want to mount the sticker does not contain Teflon or acrylic.
These substances cause the sticker to peel off shortly after it has been glued and can no longer be glued back on.
Usually, these substances are specified on the paint bucket.
If you can’t find the contents of the paint, try sticking a normal sticker and see if it sticks.
It is also very important that the wall does not have a texture, whether it is given by paint or unevenness such as exposed brick.