Concentrated booster that primes hair for deeper repair, enhancing the effects of N°3 Hair Perfector. It rebuilds disulfide bonds to strengthen and repair severe damage for healthier, more resilient hair.

5.2 fl. oz. (155 ml)

Key Benefits: 

• Intensifies repair results with N°3
• Strengthens hair and reduces breakage
• Rebuilds hair bonds at a molecular level

How to use:

1. On dry hair, apply and distribute evenly from root to tip. 
2. Leave on for 10 minutes. Do not rinse.
3. Apply N°3 Hair Perfector and comb through. 
4. Leave on for 10 minutes. Rinse well.
5. Shampoo and condition with N°4 and N°5.

Use as a two-part system with N°3 once a week or 2-3x per week for very damaged hair.