The basics Extenda-Bond has been a favorite in the industry for quite some time. You probably know it by its distinctive holes which allow the scalp to breathe. The benefits  As part of our maximum wear category (2-4+ weeks), It’s one of our longest holding tapes. The uses You can expect a 4 week hold from this acrylic adhesive. It also has a very dull finish that is virtually invisible under the unit. The bottom line It’s flexibility makes it extremely comfortable to wear.