House painter's tape is rated by how many days it can be left up without leaving residue on the surface being masked. It is available in 1-, 3-, 7-, 14-, 30-, and 60-day ratings, with the 7- and 14-day tapes being the most common. The longer-rated tapes are typically less adhesive, and are sold for use on smooth, delicate surfaces such as vinyl wallpaper and recently painted walls. Painter's (decorator's) tape in the U.S is most often the blue variety or sometimes purple in color as opposed to the tan or off white household masking tape. Spraying WD-40 is a popular way to remove any sticky residue.