Kérastase Résistance Ciment Anti-Usure is a repairing, anti-breakage conditioner formulated for weak, damaged, and over-processed hair. At 6.8 fl oz (200 ml), it delivers a professional-grade treatment that reconstructs the hair fiber from within, leaving strands noticeably softer, stronger, and more luminous. It was awarded InStyle Magazine's Best Beauty Buys "Best Conditioner for Brittle Hair."

The formula is powered by three key active ingredients: a Pro-Keratine Complex — a blend of proteins and amino acids including serine, arginine, and glutamic acid — that reconstructs damaged hair fiber; Ceramides, which enhance shine, promote elasticity, and improve moisture retention; and Resurrection Plant Sap, which helps smooth and deeply hydrate even the most compromised hair. Together, these ingredients work to prevent breakage, reinforce hair structure, and add brilliant shine.

To use, apply a quarter-sized amount to washed, towel-dried hair, massaging gently through lengths and ends. Leave in for 2–3 minutes, then rinse thoroughly. Gentle enough for daily use; can also be alternated weekly with the Masque Force Architecte for deeper conditioning. Best paired with the Résistance Bain Force Architecte shampoo for a complete restorative routine.