Résistance Masque Extentioniste Hair Mask

Indulgent strength for long lengths. A restorative pause for hair on its length-loving journey. Kérastase Résistance Masque Extentioniste is a luxurious, fibre-strengthening mask that fortifies fragile strands, improves resilience, and helps reduce breakage so long lengths stay strong and beautiful. Its rich, velvety texture envelops each fibre, restoring softness, elasticity, and vitality while preparing the lengths for smoother, stronger-looking lengths. Formulated with the advanced Creatine R™ Complex, Ceramides, and restorative lipids, this mask works deep within the hair to reinforce structure, seal the cuticle, and protect from external stress. Perfect for lengths affected by heat styling, colouring, or Canada’s dry seasonal climate, it leaves the hair supple, strong, and beautifully nourished. A Curious stylist favourite.

Key Ingredients, Explained

• Creatine R™ Complex – Rebuilds and reinforces the internal fibre structure
• Ceramides – Smooth and protect the cuticle to prevent breakage
• Lipids & Conditioning Agents – Improve softness, shine, and elasticity

What It Does

• Strengthens the fibre to reduce breakage
• Supports healthier, longer-looking lengths
• Restores elasticity and softness
• Smooths and seals the cuticle
• Enhances shine and manageability
• Leaves hair supple, resilient, and beautifully revived

Why We Love It

Because it helps your hair grow longer — beautifully. This strengthening mask reduces breakage, restores softness, and fortifies every strand, creating smooth, resilient lengths that move with grace.

Best For

Fragile, breakage-prone hair needing deep strengthening, improved elasticity, and smoother, healthier lengths from root to tip.

Ideal for weakened, breakage-prone hair seeking strength, softness, and enhanced length retention. Safe for colour-treated hair.

How to Use

1. Apply to towel-dried hair.
2. Work through mid-lengths and ends.
3. Leave for 5 minutes, then rinse thoroughly.
4. For fragile hair, gently detangle with fingers before rinsing.

When to use: Use 1–2 times per week after cleansing with your Extentioniste or Résistance shampoo.

The Scent

A clean, uplifting blend of citrus, fresh florals, and soft woods — energizing, modern, and beautifully refined.

Ingredients

The full ingredient list is printed on the packaging. Formulas can change, so always check the label.

What Our Stylists Say

“After hair school my hair was badly damaged. Consistent haircuts, being gentle, and this mask helped tremendously. I use it in place of conditioner.”

— Aurélie, Curious University District

Frequently Asked Questions

Where can I buy Kérastase Résistance Masque Extentioniste Hair Mask 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.