Olaplex No. 0 Intensive Bond Building Hair Treatment is a professional-grade primer designed to repair and strengthen damaged hair from within. Formulated with Olaplex’s patented Bond Building Technology, this treatment prepares the hair for deeper repair, rebuilds hair bonds, and protects hair integrity. Its lightweight formula primes hair for the No. 3 Hair Perfector, enhancing its efficacy. Suitable for all hair types, Olaplex No. 0 is ideal for use as part of a two-part system to achieve healthier, stronger hair.