Davines Naturaltech Nourishing Keratin Sealer helps protect against damage. Lock in nourishment and enhance the beauty of every strand with a lightweight. leave-in formula designed to improve softness. shine. and manageability. This protective fluid helps smooth the hair's cuticle. reducing the appearance of frizz and flyaways while boosting a glossy. healthy-looking finish. By reinforcing the hair fiber. it helps minimize the look of split ends. promoting a more polished and well-maintained appearance.