Kérastase Resistance Ciment Thermique repairs and protects hair with its heat activated properties. The leave-in milk contains the brand\'s trademark formula Vita-Ciment Topseal, working to strengthen and rebuild hair from the inside out whilst also repairing the outer layer leaving a protective topcoat. Providing protection from the moment heat reaches the hair, heated styling is made guilt-free, leaving a smooth and shiny finish for healthier looking and feeling locks. Proven to speed up your blow-dry by half the time.