The Overlay/Sealer, also called a semi-permanent gloss, is formulated to adhere to the cuticle or surface of the hair for another level of enhancement. The process results to such benefits as sealed-in moisture and protein revitalize, as well as a flattened surface that exudes an incredible shiny, silky hair with fewer tangles. You have a choice from an array of translucent color glosses to enhance any hair color, from natural to highlighted. You are sure to appreciate a healthier, glossy appearance made possible with the Overlay/Sealer.