Kerastase Resistance Extentioniste Thermique

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Length Caring Gel Cream

Kerastase Resistance Extentioniste Thermique is the newest heat-activated leave-in designed to significantly improve the hair structure while treating it when blow-drying or ironing. This heat-styling cream seals lengths and split ends to reduce hair breakage during styling for temperatures up to 450°F. Kerastase Extentioniste Thermique is enriched with Creatine R and Taurine to rebuild the natural protective coat of each strand and repair it within using the latest technology. The results are astonishing; with Extentioniste Thermique-blow dry primer you can extend your limits even further for healthy-looking, strong lengths with natural lightness.


  • For weakened and damaged lengths
  • 90% less breakage* after one application
  • Infused with Creatine R and Taurine
  • Reinforces and seals lengths and ends
  • Protects against heat up to 450°F
  • Cruelty-free/No Animal Testing

*vs. non-conditioning shampoo


Apply a walnut-sized amount to towel-dried hair and then style using a hairdryer or heat styling appliance. In case of contact with eyes, rinse them immediately and thoroughly. Leave-in.


Aqua / Water / Eau, Isopropyl Myristate, Dimethicone, Triethanolamine, Amodimethicone, Phenoxyethanol, Carbomer, Polyquaternium-4, Potato Starch Modified, Hydroxypropyl Guar, Behentrimonium Chloride, Trideceth-6, Amyl Cinnamal, Hexyl Cinnamal, Isopropyl Alcohol, Benzyl Alcohol, Linalool, Hydroxycitronellal, Cetrimonium Chloride, Citronellol, Limonene, Benzyl Cinnamate, Creatine, 2-Oleamido-1-3-Octadecanediol, Taurine, Parfum / Fragrance.


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  • 5

    Posted by Jennifer on 22nd Oct 2019

    I am using the extentioniste shampoo and conditioner since it came out few months ago and I love it. I recently ran out of my L'incroyable Blow-Dry Lotion so I have decided to try Extentioniste Thermique with my heat styling tools. Right after opening I was introduced to the similar lovely smell :) The gel cream has thin consistency and is very easy to apply. After blow-drying and little flat ironing with extetnioniste thermique my hair was spectacular !...looking healthy and shine without any signs of frizz. I am in love with this new product and I hope Kerastase will not change the formula on this one for long time! Highly recommended!