Primes the hair for MAXIMUM repair!

The No.0 Intensive Bond Building Hair Treatment has been redesigned for fast, targeted application. It features an easy-to-use nozzle that primes the hair and delivers the highest concentration of 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.

Number of Applications: The No.0 bottle should last 3-6 applications based on the length and density of your hair."