Kérastase Résistance Extentioniste Mask 500ml for fragile, damaged and breakage-prone hair

Intensive strengthening treatment for hair that breaks easily

The Kérastase Résistance Extentioniste Mask 500ml is a professional treatment designed for fragile, sensitized and weakened hair that tends to break as it grows. This nourishing mask helps strengthen the hair structure, improving resistance and allowing you to achieve stronger-looking, healthier lengths.

Thanks to its advanced formula, the product works inside the hair fiber to repair damage and reinforce lengths, leaving hair more elastic, shiny and manageable.

The professional 500ml size is ideal for regular intensive treatments or salon use.

Benefits of the Kérastase Extentioniste Mask

Strengthens hair structure

The presence of Creatine R helps improve fiber strength, aiding in the prevention of hair breakage.

Reduces split ends and damaged lengths

Maleic Acid works within the hair to reinforce weaker areas and improve the compactness of the lengths.

Promotes longer, more resilient hair

By limiting breakage during styling and brushing, hair can grow while maintaining a healthier, more even appearance.

Adds softness and shine

The rich texture nourishes the hair, leaving it silky, easy to comb and visibly more radiant.

Who this mask is for

The Kérastase Résistance Extentioniste Mask is particularly suitable for:

• Fragile and weakened hair

• Hair damaged by chemical treatments

• Hair that breaks easily as it grows

• Those who want longer, stronger hair

• Hair with split ends or damaged tips

• Lengths stressed by heat or frequent styling

It is an ideal treatment for those who want to strengthen lengths and improve hair quality over time.

Key active ingredients

Creatine R

A strengthening complex that helps improve hair resilience and elasticity.

Maleic Acid

An active ingredient that penetrates the hair fiber, helping to repair and protect damaged lengths.

How to use the mask

1. Apply the product to clean, towel-dried hair.

2. Evenly distribute on lengths and ends, avoiding the roots.

3. Massage gently to promote absorption.

4. Leave on for about 5 minutes.

5. Add a small amount of water to emulsify.

6. Rinse thoroughly.

Professional tips

To get the most from the treatment:

• Use together with the Kérastase Résistance Extentioniste shampoo.

• Apply the mask 1–2 times a week.

• Gently comb the hair after application to distribute the product evenly.

Ingredients (INCI)

Aqua / Water, Cetearyl Alcohol, Amodimethicone, Behentrimonium Methosulfate, Behentrimonium Chloride, Ethanolamine, Maleic Acid, Phenoxyethanol, Isopropyl Alcohol, Benzoic Acid, Trideceth-6, Hydroxypropyl Guar, Amyl Cinnamal, Hexyl Cinnamal, Benzyl Alcohol, Cetrimonium Chloride, Linalool, Hydroxycitronellal, Citronellol, Limonene, Benzyl Cinnamate, Creatine, 2-Oleamido-1,3-Octadecanediol, Parfum / Fragrance.

Ingredient lists may be updated over time. We recommend always checking the list on the product packaging.

Warnings

In case of contact with the eyes, rinse immediately with plenty of water.

Product distributed by:
L’Oréal
14, Rue Royale 75008 Paris
servizioconsumatorikerastase.corpit@loreal.com

Frequently Asked Questions (FAQ)

What is the difference between the 200ml and 500ml sizes?

The formula is the same, but the 500ml size is more cost-effective and designed for frequent or professional use.

Is this mask suitable for fine hair?

Yes, provided it is applied only to lengths and ends without touching the roots.

How often should the mask be used?

Generally once or twice a week is sufficient to keep hair strong and nourished.

Is it suitable for colored or bleached hair?

Yes, it helps strengthen chemically treated hair that tends to become fragile.

Does it really help hair grow longer?

It does not speed up growth, but reduces breakage, allowing hair to retain length.

Can it be used on very dry hair?

Yes, its nourishing formula helps improve softness and elasticity of dry, fragile hair.