Genesis Thermique Blow Dry Primer, Heat Protectant for Weak or Damaged Hair, Anti-Breakage, Detangles and Hydrates without Frizz, Sulfate Free and Defense Thermique, 5.1 Fl Oz

The Kérastase Genesis Défense Thermique isn’t just a heat protectant — it’s hair armor. I spray it on before blow-drying or straightening, and my hair looks like glass — smooth, frizz-free, and so soft I can’t stop touching it. It smells absolutely divine (that signature Kérastase scent that lasts all day 😍) and doesn’t leave any stickiness or residue. My ends used to look fried after heat styling, but now they stay healthy and shiny — like I just walked out of a salon. It’s lightweight, nourishing, and seriously protective — my hair feels stronger with every use. Whether you use heat daily or just occasionally, this spray is a must-have in your routine.

I love this thermal protector from Kérastase. Leaves the hair super soft, manageable and with a beautiful shine without leaving it heavy. It protects very well from heat and helps reduce breakage, especially if you use an iron or dryer. It smells delicious and the quality is noticeable from the first use. Highly recommended.

Has a wonderful smell. A small amount goes a long way and it’s really helping my hair stay healthier.

Wonderful product - instantly allows my long hair to de tangle and be combed easily

If you regularly use hot tools on your hair this thermal spray is an absolute must. It works great as a detangler right out of the shower and smells AMAZING!

My girlfriend gets thinning hair during stressful times and this really helps! Good product, a little bit on the pricey side but well worth it. Have purchase several times

This blow dry primer leaves my hair feeling soft, smooth, and way less frizzy. It also does a great job protecting from heat and detangling. But the spray nozzle isn’t great, it’s hard to control and sometimes sprays unevenly, which can be annoying.

This leaves my hair smooth, shiny, and much less frizzy, even in the PNW. It’s pricier than I think it should be, but it does a great job.

It has a good fragrance but doesn’t help with frizzy hair until used in large quantities.

Les cheveux sont protégés et la coiffure est améliorée

Desembaraça muito bem antes de se usar secador

I recently purchased the **Kerastase Genesis Defence Thermique Treatment** and I am very happy with my purchase. This treatment has become an essential part of my hair care routine. It provides excellent protection for weakened hair, helping to prevent breakage and heat damage. The lightweight formula is easy to apply and doesn't weigh down my hair. I love how it leaves my hair feeling soft, smooth, and manageable. The Kerastase Genesis Defence Thermique Treatment is enriched with Edelweiss Native Cells, Ginger Root, and Aquaxyl, which help to strengthen the hair and provide intense hydration. It offers heat protection up to 230°C, making it perfect for use with styling tools. I have noticed a significant reduction in hair breakage since using this treatment. I also appreciate that this treatment is suitable for all hair types. Whether you have fine, thick, curly, or straight hair, the Kerastase Genesis Defence Thermique Treatment can benefit you. It helps to detangle and protect the hair from environmental aggressors, leaving it looking healthy and shiny. Overall, I highly recommend the Kerastase Genesis Defence Thermique Treatment to anyone looking for a high-quality heat protectant and strengthening treatment for their hair. It delivers on its promises and has made a noticeable difference in the health and appearance of my hair. I hope this review captures the essence of this fantastic treatment!

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