Two-step Olaplex repair duo featuring No.0 Intensive Bond Building Treatment (155ml) and No.3 Hair Perfector (250ml jumbo). No.0 primes and delivers Olaplex’s highest at-home concentration of patented bond-building technology to prepare hair for deeper repair. Apply to dry hair, saturating sections; leave 10 minutes (do not rinse). Follow with No.3: comb through, leave a minimum of 10 minutes, then rinse, shampoo and condition. When used as a two-part system in one use, clinical testing shows 68% more repair and up to 3x stronger hair. Suitable for all hair types, especially damaged, coloured or chemically treated hair. For best results use No.0 + No.3 once a week, or 2–3 times weekly for more damaged hair. No.3 pH balanced (3.5–5).