Lisa Art performs VIP services for brides, make-up and hair extensions and eyebrow microbleeding with two modern methods (fibrosis and boldbrush) How does hair rebonding straighten hair? Hair rebonding is a way to straighten your hair using powerful chemicals. This process takes several hours. In fact, water breaks down the hydrogen bonds of the creatine molecules in your hair. Then a chemical, usually formaldehyde, creates the new structure of your hair. The result is hair that looks even smoother than natural straight hair.