WARNING In case I have not mentioned this, this is not a REAL Aperture Labs decal. It is only a prop decal made to look authentic. If you apply this decal on your car and try to enter the company there will be no cake. You have been warned. How to apply Cling decals. This decal will adhere to any clean and dry surface. Images are reversed-printed. Peel the paper backing and apply to the inside of your window. Do not block your view. Decals are best applied in temperatures of 65 degrees and over. Decals can be removed and re-applied.