Kérastase K Premiere Concentré Décalcifiant transforms damaged hair with its advanced decalcifying formula. This luxurious pre-shampoo treatment removes mineral buildup and impurities that dull and weaken strands, restoring softness and shine. Enriched with repairing actives, it penetrates deeply to mend breakage and restore elasticity before shampooing. Perfect for colour-treated or chemically processed hair, this 250ml concentrate delivers salon-quality restoration in just minutes. Apply to damp hair, leave for 5-10 minutes, then shampoo for visibly revitalised, healthier-looking locks with renewed vitality and lustre.