Revitalize dry, damaged hair with the OGX Bond Protein Repair Sealing Serum. This strengthening hair serum is paraben-free, fights frizz and delivers healthy-looking hair that is softer, smoother, and stronger. The strengthening hair serum delivers 2x smoother and up to 5x stronger hair after five washes for beautiful, healthy-looking hair. Before bed, apply a small amount of the hair serum to your hands, rub together, and apply evenly to damp or dry hair working from the ends upward. You can leave the 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 and style.