Première Concentré Décalcifiant Ultra-Réparateur

An intensive reset for damaged hair. Kérastase Première Concentré Décalcifiant Ultra-Réparateur is a pre-shampoo treatment with an 8% concentration of pure acids. It removes calcium build-up from hard water and repairs damaged hair from the inside, reversing stiffness and dullness. 250 ml. A Curious stylist favourite.

Key Ingredients, Explained

• Citric acid: An organic acid (AHA) that captures and removes calcium build-up from hard water, inside and on the surface of the hair, to fight dullness and stiffness.
• Glycine: An amino acid that penetrates the hair's inner layer once calcium is removed, helping reconnect broken bonds between keratin chains to reduce breakage.

Why We Love It

• 8% pure acids: the line's most concentrated formula.
• Removes hard-water calcium build-up.
• Repairs bonds to reduce breakage.

Best For

Damaged, bleached, over-processed, dull or stiff hair, and hard-water homes.

How to Use

1. On damp hair, apply 3 to 5 pumps from mid-lengths to ends.
2. Leave on for 5 minutes. Do not rinse.
3. Apply Bain Décalcifiant Réparateur directly on top, lather, then rinse everything out together.
4. Follow with Fondant Fluidité or Masque Filler.

What Our Stylists Say

“It makes your hair feel healthy, lighter and softer.”

— Sophia, Curious University District

“Calgary is notorious for hard water, and most people don't have a water softener at home. This is a life-changing product.”

— Victoria, Curious Aspen Landing

Curious Stylist Tip

Don't rinse the Concentré before shampooing. Layering Bain directly on top is how Kérastase designed it to work best.

Your Première Ritual

1. Concentré Décalcifiant Ultra-Réparateur (pre-shampoo)
2. Bain Décalcifiant Réparateur (shampoo)
3. Fondant Fluidité Réparateur or Masque Filler Réparateur (conditioner or mask)
4. Sérum Filler Fondamental or Huile Gloss Réparatrice (leave-in)

Ingredients

Aqua / Water, Glycerin, Propylene Glycol, Glycine, Citric Acid, PEG-40 Hydrogenated Castor Oil, Sodium Hydroxide, Parfum / Fragrance, Cetrimonium Chloride, Polysorbate 20, Polysorbate 80, Phenoxyethanol, Hydrolyzed Vegetable Protein PG-Propyl Silanetriol, Hydroxypropyl Guar, Hydroxypropyl Guar Hydroxypropyltrimonium Chloride, Quaternium-80, Limonene, Linalool, Sodium Benzoate, Citral, Potassium Sorbate.

Formulas can change. Check the bottle for the current list.

Frequently Asked Questions

Why does hard water damage hair?

Calgary and much of Alberta have hard water, which leaves calcium deposits on hair. Damaged, bleached or porous hair absorbs even more, so it looks dull and feels stiff and brittle. Première removes that calcium while repairing.

How long do I leave it on?

Apply 3 to 5 pumps to damp hair and leave it on for 5 minutes before shampooing.

How often should I use it?

Before every shampoo during the repair phase, then 1 to 2 times a week to maintain.

Do I rinse it before shampoo?

No. Apply Bain Décalcifiant on top, lather and rinse together.

Where can I buy Kérastase in Canada?

Online at rucurious.ca, with free shipping across Canada on orders over $65, or in person at Curious salons across Calgary, Cochrane and Rocky View, Alberta. Explore the full Kérastase collection.

Is this authentic Kérastase?

Yes. Curious is an authorized Kérastase retailer, and every product is sourced directly from the manufacturer.