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Resistance Extentioniste

Exceptional hair knows no limits. Extend your hair limits with our first 90 day hair
program designed to optimize and reinforce the length of damaged hair.
Kerastase Resistance Extentioniste Hair Care Emily Ratajkowski

Want 99% less breakage & 78% less split ends*

Tired of asking your stylist for a trim in order to keep your hair healthy? Extentioniste targets hair fiber from root to tip to keep it fortified while repairing split ends and breakage.

*After one application of the routine: Bain Extentioniste + Soin N°1 + Soin N°2 + Sérum Thérapiste vs. non-conditioning shampoo

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Kerastase Resistance Bain Extentioniste Shampoo

Bain Extentioniste

Length strengthening shampoo for slow growing, damaged lengths.

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Kerastase Resistance Fondant Extentioniste Conditioner

Fondant Extentioniste

Length strengthening conditioner for slow growing, damaged lengths.

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Kerastase Resistance Masque Extentioniste Hair Mask

Masque Extentioniste

Length strengthening masque for slow growing, damaged lengths.

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Kerastase Resistance Serum Extentioniste Hair Serum

Serum Extentioniste

Strengthening scalp and hair serum for stronger fiber from the roots.

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Reset. Strengthen. Repeat.

Meet Millie Mackintosh, our influencer and bride to be! With Extentioniste's 90 day hair training program, Millie's hair is stronger and longer for her big day.



Find Your Nearest Salon

Far more than the place to get your root touch-up or an occasional trim, book an appointment at your nearest Kérastase salon for a complimentary personalized hair diagnosis.


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Services Your Personal Care





Fusio-Dose In Salon

Learn about the signature in-salon service that transforms
hair quality in under 5 minutes.


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The Right Products for You

Take the online hair diagnostic to find the best hair care
and treatment mix for your hair.


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