Olaplex No.0 Intensive Bond Building Hair Treatment 5.2 oz (Limit time offer) Authentic Brand New Free shipping when you bundle 3 transactions and up. OLAPLEX No.0 Intensive Bond Building Hair Treatment is a professional-inspired treatment that primes your hair for deeper repair, rebuilds hair bonds, strengthens, and protects hair integrity. Use as the first step in a two-part system with No.3 Hair Perfector (sold separately). Benefits Primes hair to intensify benefits of No.3 Jump starts repair deep within the hair strand Contains OLAPLEX patented bond building technology that rebuilds broken and weakened bonds For all hair types PH balanced Cruelty free