OLAPLEX’s most concentrated bond-building formula, designed to be added to chemical treatments like hair color, lighteners, or permanent waves. It strengthens and protects disulfide bonds inside the hair during chemical services, reducing damage and helping maintain hair integrity. Nº.1 can also be used as the first step of a standalone Strength & Repair Treatment when mixed with water. Anytime Nº.1 is used, it should be followed by Nº.2 Bond Perfector to complete the repair process.
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