PROFESSIONAL's KERATIN HAIR REPAIR mask - Just massage it on & wash! Suitable for natural or color-treated hair it even enhances dyed hair color making it more vibrant. Perfect for all hair types. PROFESSIONAL's KERATIN HAIR Hair : Deeply conditions detangles hydrates and revives dull and dry hair improving its manageability and elasticity and giving it a beautiful shine.. Keratin hair will smooth damaged hair follicles and fix split ends leaving you with beautiful silky locks.