Kérastase Première Bain Décalcifiant Réparateur is a clarifying and repairing shampoo designed to remove mineral buildup and restore hair fiber integrity. This specialized formulation targets hard water damage, which can leave hair dull, brittle, and difficult to manage. By gently chelating calcium and other mineral deposits, it prepares the hair to better absorb subsequent care treatments, leading to strengthened and visibly revitalized locks. Ideal for use before deep conditioning treatments or masks, this shampoo ensures optimal product penetration and performance.