Extended Wear (Permanent Attachments) 3 to 6 Week Hold Like the name implies, they are the closest to a permanent bond. Depending on the temprature, humidity, and body oilss they can last up to 6 weeks. Usually, the tackiest, they require more skill to apply. Acrylic | Waterproof. This Adhesive is the leading standard for soft bonds. It is famous for its long hold time. Has a clear Non-Yellowing formula that is used extensively in the medical industry.