Kérastase Ciment Thermique from the Résistance series is a heat-activating leave-in care product that significantly improves the hair structure and at the same time cares for it during application with a hairdryer or straightening iron. Hairdryers, brushes and straightening irons are stress factors for the hair, which attack the structure. The dandruff layer can no longer be held together and the inside of the hair fibre is therefore more susceptible to harmful external influences, becomes porous, brittle and loses more and more of its resistance. The Ciment Thermique rebuilds the natural protective coat of the hair and repairs the structure. The result is strong, smooth, shiny hair with natural lightness.