Softsheen Carson Hydra Steam Moisturizing System Moisturizing Sealing Spray is the third step in the Hydra Steam Moisturizing System, the moisturizing sealing spray is a post-steam leave-in spray that is formulated to respect the hair s pH level. This lightweight formula is designed to help seal hair cuticle after steam treatment. This product is exclusively designed for stylist to use with steam treatments. Hydra Steam enhanced curl definition with long-lasting frizz control and delivers intense moisture.