Kerastase Premiere Concentre Decalcifiant Ultra-Reparateur – decalcifying repair pre-shampoo for damaged hair

Kerastase Premiere Concentre Decalcifiant Ultra-Reparateur is a transformative first step in a high performance haircare ritual designed to restore damaged and sensitized hair. Infused with 8% pure acids, this innovative pre-shampoo treatment targets mineral buildup specifically calcium deposits caused by hard water that compromise hair’s strength, suppleness, and radiance. Its lightweight gel texture penetrates deep into the fiber to rebuild keratin bonds, delivering renewed resilience, structure, and shine from within.

Deep decalcification and inner-fiber renewal

Hair that has been bleached, chemically treated, or frequently exposed to hard water becomes more porous and up to three times more absorbent to calcium than healthy hair. This excess leads to stiffness, breakage, and dullness, as calcium interferes with the hair's natural protein structure. Concentre Decalcifiant works at the heart of the fiber to neutralize mineral overload, relieve internal stress, and visibly transform compromised hair. By reconnecting broken keratin chains, the hair emerges smoother, more elastic, and fortified.

Why you’ll love it

This essential pre-cleansing step is a must have for hair that has lost its vitality due to repeated coloring, bleaching, or environmental exposure. Powered by citric acid and glycine, the formula performs a dual action: it dissolves calcium buildup and repairs the inner fiber, setting the foundation for long-lasting softness, strength, and luminosity.

Proven results:

• Gently removes calcium and reverses persistent damage
• Restores 99% of hair’s original strength
• +97% improvement in internal structure
• -93% reduction in breakage
• +75% enhanced shine and refined texture

*Instrumental test after 6 applications using the full Kerastase Premiere ritual (Concentre + Bain + Fondant or Masque)

Star ingredients:

• Citric Acid – a natural decalcifying agent that purifies and smooths the hair fiber
• Glycine – a reparative amino acid that penetrates the cortex to reinforce the keratin structure
• Gel-in-cream texture – absorbs effortlessly for a luxurious in-salon or at-home ritual
• Portofino Summer Fragrance – an elegant blend of citrus, mandarin, orange blossom, and jasmine

How to use:

Step 1: Apply generously to damp lengths and ends before shampooing.
Step 2: Massage gently and leave on for 5 minutes. Apply shampoo directly over the treatment for optimal performance.
Step 3: Rinse thoroughly, then proceed with your favorite conditioner or mask.

Pair with products from the Kerastase Premiere collection for a complete recovery routine tailored to deeply damaged hair. Together, these formulas rebuild, strengthen, and illuminate from root to tip revealing hair that feels renewed, resilient, and luxuriously soft.

Who it's for

Ideal for all hair types experiencing intensive damage, especially hair that is bleached, chemically processed, or regularly exposed to hard water. Perfect for ongoing use as part of a targeted reparative regimen.