No.0 Intensive Bond Building Hair Treatment delivers the highest concentration of the patented bond building technology of any OLAPLEX at home product. 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.

Scientifically Proven: 68% more repair & 3x stronger hair* *When used as a two-part system in just one use.