Intensive Bond Building Treatment.

A professional-inspired treatment that primes hair for deeper repair with the highest dose of patented OLAPLEX technology in any take-home product. It rebuilds hair bonds, strengthens and protects hair integrity. Use as the first step in a two-part system with No.3 Hair Perfector.

APPLICATION TIP: No.0 bottle should last 3 -6 applications, based on hair length and density

SCIENTIFICALLY PROVEN: 68% more repair & 3x stronger hair* when used as a two-part system in just one use.