Rebuilds hair bonds, strengthens and protects hair integrity. Use as the first step in a two-part system with N°.3 Hair Perfector.
Apply to dry hair, fully saturating each section.All hair types, especially for those with visible damage. Scientifically Proven: 68% more repair & 3x stronger hair* *When used as a two-part system in just one use. APPLICATION TIP: N°.0 bottle should last 3-6 applications, based on hair length and density.