Hair bonding is a popular temporary weaving method and a great way to add volume or vibrant streaks of color to your natural hair. Tracks of hair are glued to the roots of your own hair with a special adhesive. To prevent damage to your natural hair, tracks shouldn't be left for any longer than a week or two. Bonding may also refer to the attachment of toupees (and custom wigs)with a medical grade adhesive. There are 2 types of bond: soft bond which dries in the consistency of rubber glue and hard bond which dries to the consistency of crazy glue. Hard bond is only recommended for the small number of people for which soft bond does not hold properly. These permanent bond attachments generally last 4-6 weeks before a maintence appoint is necessary. This option allows you to remove the hair unit whenever you desire.