b3 Brazilian Bond Builder in a convenient, easy-to-use professional size. Designed with the busy colorist in mind, this bottle makes it easy to measure and mix b3 Brazilian Bond Builder into all of your color formulations and lighteners to dramatically reduce breakage and prolong color life with no added processing time. Helps prevent damage during all color services Protects against loss of cuticle and cortex cells No change to developer Dramatically reduces breakage Better gray coverage Improves pigment retention Compatible with all manufacturer formulations