Keratin hair extensions are long-lasting hair extensions that are attached to existing hair. The end of the hair extension is dipped in a clear, keratin-based adhesive. Depending on the amount of keratin used, the extensions can be attached by glue, clips, or thermal fusion. They are one of the most popular types of hair extensions and the kind most often used for celebrity hair extensions. The extensions last for months, much longer than other varieties of hair extensions.
