Goldwell Kerasilk Ultra Rich Keratin Care Oil feed moisture back in to your extremely damaged hair with this indulging treatment. Kerasilk will transform your hair in to smoother, softer and hydrated hair without weighing it down. Get beautiful shiny, silky hair that lasts. Excellent for hair that has been exposed to many chemical services and needs to be repaired! Depending on your hair's dryness, apply the oil sparingly or liberally on towel-dried or dry hair, do not rinse out.