ScotchBlue™ Sharp Lines painter's tape features Edge-Lock™ technology that seals out paint to deliver sharp paint lines. Provides multi-surface performance, 21-day clean removal and medium adhesive. ScotchBlue™ Sharp Lines painter's tape features Edge-Lock™ technology that seals out paint to deliver sharp paint lines. Whether you're protecting your wood trim, painted walls, tile floor or glass windows, this versatile multi-surface tape can stay on surfaces for up to 21 days and then removes easily without leaving any sticky residue behind. Help keep your wainscoting paint free or shield your built-in shelves with the powerful protection of ScotchBlue™ Sharp Lines painter's tape.