No.3 Hair Perfector works dynamically to help repair damage to all hair types, and it can also be applied once a week between chemical services to further lock-in the results of any given salon treatment. Discover how fabulous it feels to have incredibly strong, totally healthy hair. No.3 Hair Perfector is not a conditioner. No.3 is an at home bond builder that contains the same active ingredient found in all professional Olaplex products. The patented technology relinks the broken disulfide bonds in every type of hair providing real, structural repair that works from within.