Olaplex No. 0 Intensive Bond Building Hair Treatment 155ml. Olaplex 0 is suitable for all hair types, especially visibly damaged hair in need of deep repair.. Prime the hair for a deeper repairing treatment with Olaplex No.0 Mask, an at-home hair treatment inspired by professionals.. This professional-inspired treatment primes your hair for deeper repair, rebuilds hair bonds, strengthens, and protects hair integrity.. Use as the first step in a two-part at-home system with No.3 Hair Perfector to strengthen and repair all types of damaged hair.. Redesigned for a quick and targeted stream application, the No.0 Intensive Bond Building Hair Treatment features an easy to use nozzle that primes the hair and delivers the highest concentration of the patented bond building technology of any Olaplex at home product.