OLAPLEX Bond Perfector No. 2 is a highly concentrated, intensive treatment designed to work synergistically with all professional chemical services or as a standalone restorative treatment. This professional-grade formula rebuilds broken disulfide bonds within the hair, strengthening the hair structure from within. It repairs damage caused by coloring, bleaching, and heat styling, significantly improving hair strength and integrity after chemical over-processing. Ideal for use in-salon after color services or as a deep repair step between salon visits to maintain optimal hair health.