Revitalize dry, damaged hair with the OGX Bond Protein Repair Sealing Serum. This strengthening anti frizz hair serum is paraben-free, fights frizz & delivers healthy-looking hair that is softer, smoother, & stronger.** The bond repairing hair serum delivers 2x smoother & up to 5x stronger hair after five washes* for beautiful, healthy-looking hair. Before bed, apply a small amount of the hair serum for damaged & frizzy hair to your hands, rub together, & apply evenly to damp or dry hair working from the ends upward. You can leave the hair gloss serum in overnight, there is no need to rinse it out. Combine it with the entire OGX Bond Protein Repair line to cleanse, condition, treat, protect & style. *with system use of OGX Bond Protein Repair Shampoo, Conditioner, Sealing Serum followed by washing 5x with Shampoo & Conditioner, vs non-conditioning shampoo **vs non-conditioning shampoo