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. It is used 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.
 
For application, apply to dry hair, fully saturating each section. Let process for 10 minutes. Do not rinse. Apply No.3 Hair Perfector over hair with No.0 applied to it. Comb through and let process for at least another 10 minutes. Rinse, shampoo & condition.