Suave Keratin Infusion Smooth & Shine Serum. Professionals. New. Salon proven. To restore shine as well as Kerastase*. For frizzy & unmanageable hair. Natural Keratin protein in hair depletes over time leaving it unmanageable, frizzy, and harder to style. Keralock, technology infuses keratin. 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. *Kerastase Elixir Ultime. Kerastase is a registered trademark of L'Oreal SA. Unilever.