Résistance Bain Extentioniste

The foundation for long, strong lengths. Kérastase Résistance Bain Extentioniste is a strengthening shampoo for long hair with weakened lengths. Creatine R and taurine increase elasticity and strength from root to tip while the rich, airy lather cleanses and leaves hair shiny. 250 ml or 500 ml. A Curious stylist favourite.

Key Ingredients, Explained

• Creatine R: An exclusive complex of creatine, an amino acid that reinforces the hair's internal structure, and ceramide, which helps recover the hair surface.
• Taurine: An amino acid with a protective effect on the hair that helps keep the scalp environment healthy and stimulated.

What It Does

• Increases elasticity and strength from root to tip.
• Rebuilds the natural strength of the fibre.
• Purifies and supports a healthy scalp environment.
• Adds shine to lengths and ends.

Why We Love It

• Rich, airy lather with an aromatic fragrance.
• Preps hair for the conditioner.
• 500 ml size for long-hair regulars.

Best For

Long hair with weakened, damaged lengths, or anyone growing their hair out.

How to Use

1. Apply to wet hair.
2. Massage well to release the lather.
3. Rinse thoroughly.
4. Follow with Fondant Extentioniste.

Curious Stylist Tip

Use a scalp brush when you lather. The massage helps the creatine and taurine reach every section of the scalp.

Your Extentioniste Ritual

1. Cleanse: Bain Extentioniste.
2. Condition: Fondant Extentioniste.
3. Scalp: Sérum Extentioniste once or twice a week.
4. Protect: Thermique Extentioniste before blow-drying.

The Scent

A tasty opening of fresh, biting notes, a sweet, fruity heart, and a delicate, musky floral base.

Ingredients

Aqua / Water, Sodium Laureth Sulfate, Cocamidopropyl Betaine, Taurine, Cocamide MIPA, Amodimethicone, Sodium Chloride, Laureth-5 Carboxylic Acid, PPG-5-Ceteth-20, Sodium Benzoate, Sodium Hydroxide, Citric Acid, Polyquaternium-10, PEG-55 Propylene Glycol Oleate, Propylene Glycol, PEG-60 Hydrogenated Castor Oil, Salicylic Acid, Amyl Cinnamal, Hexyl Cinnamal, Benzyl Alcohol, Linalool, Hydroxycitronellal, Citronellol, Limonene, Creatine, 2-Oleamido-1,3-Octadecanediol, Benzyl Cinnamate, Parfum / Fragrance.

Formulas can change, so check the packaging for the current list.

Frequently Asked Questions

Who is Extentioniste for?

Anyone with long hair or growing their hair out whose lengths are weakened or prone to split ends.

Can I use it every day?

Yes.

What size should I buy?

The 250 ml is a great start. The 500 ml is better value for long, thick hair.

Where can I buy Kérastase Résistance 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.