For Frizzy & Unmanageable Hair. salon proven. new Natural keratin protein in hair depletes over time leaving it unmanageable, frizzy, and harder to style. This shine-perfecting serum, formulated with Keralock™ Technology keratin and seals hair cuticle making it smooth and shiny. Fights humidity without leaving residue. Infuses keratin and seals hair fiber for: lustrous shine. frizz control for up to 48 hours. smooth & manageable hair.