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Primes hair for maximum repair.  Our 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™ (sold separately) 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 co