Duct tapes are waterproof, cloth-backed tapes that offer excellent strength, durability, and flexibility. They are easily ripped for fast and easy application. They can be permanent or removable, though some duct tapes leave behind residue when removed. Duct tapes come in different grades including professional and industrial. Industrial duct tapes are used in manufacturing, aerospace, and military environments while professional grades are used in home repair and light-duty sealing applications.