Duct tape or gaffer tape is a strong, fabric-based adhesive tape. It is usually silver or black in colour but other colours are available. It is usually 1.88 inches (48 mm) wide.
Its main disadvantage is that it can hurt when peeled off the skin. If this is a problem, bondage tape may be used instead. However, it is harder for a bound victim to remove duct tape.
A particularly strong form of duct tape is sold under the name gorilla tape.