Davines NaturalTech Nourishing Keratin Sealer is a cuticle sealing fluid. Features Benefits: Thanks to its lightweight formula, it seals the hair cuticles, increasing brightness and softness. Strengthens the hair fiber, preventing the formation of split ends. Increases the benefits from the previous Nourishing products. It can be used both in salon and at home to finalize and enhance the restructuring routine, ensuring long lasting results and providing extra softness without weighing down the hair.