What It Is Multi benefit treatment for all hair types and textures. What It Does Leave in conditioner that instantly nourishes and detangles, helps prevent heat damage and is safe for color-treated hair. What Else You Need to Know All haircare routines need a do-it-all product that can provide several different benefits. One United is Redken's all-in-one haircare product that can be used for almost any hair need. It can be used as a rinse-out treatment to provide lightweight conditioning, as a leave-in treatment for enhanced strength and nourishment, and with a styling product to provide added softness.