This professional-inspired treatment has been expertly designed to strengthen and repair damaged hair. Suitable for all types of weak, fragile and visibly damaged hair, this bond building formula pairs perfectly with Olaplex's best-selling No. 3 Hair Perfector (sold separately). When used as the first step in a two-part system with No. 3, this intensive formula helps to prime hair for deeper repair and maximum nourishment. Suitable for colour-treated hair.

Cruelty-free, vegan, paraben-free and sulfate-free formula.