Kerastase 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
$50.00








From the brand


Discover Gloss Absolu

DISCOVER ELIXIR ULTIME

Discover Première
Shop By Hair Concern
Ranges for all hair concerns

PROFESSIONAL HAIRDRESSERS:
Kérastase is a leading global luxury professional haircare brand. Born in Paris in 1964, the brand has built its reputation on delivering exceptional performance on scalp and hair through exquisite products and personalized, in-salon treatments, all powered by scientific expertise.
Kérastase adopts a care-first philosophy to care for all hair types and all individuals, as well as the world we live in.

Is Discontinued By Manufacturer : No
Product Dimensions : 1.57 x 1.57 x 7.09 inches; 6.3 ounces
Item model number : E3244800
Manufacturer : Kerastase
ASIN : B083JLYQCY
Best Sellers Rank: #8,855 in Beauty & Personal Care (See Top 100 in Beauty & Personal Care) #28 in Hair Thermal Protection Sprays
Customer Reviews: 4.6 4.6 out of 5 stars (4,727) var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
13 reviews for Kerastase 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
Fast, Reliable, and Convenient
Enjoy seamless delivery with Amazon Store. Whether you're shopping for everyday essentials, electronics, fashion, or gifts, your order is delivered straight to your door—fast and hassle-free. With options like Standard Delivery, Express Shipping, and even Same-Day Delivery in select areas, Amazon makes it easier than ever to get what you need when you need it.

Krishayna Miller –
So good! Worth every penny
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.
Emily –
💗🌸
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.
LM –
A small amount goes a long way
Has a wonderful smell. A small amount goes a long way and it’s really helping my hair stay healthier.
Candice W. –
Wonderful for hair
Wonderful product – instantly allows my long hair to de tangle and be combed easily
Amazon Customer –
A MUST HAVE FOR HOT TOOLS!
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!
Rebecca Fray –
Good product
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.
linda_apn –
Nourishing for the hair and made it glossy without being greasy
My hairstylist recommended this to me. She made me fall in love with the kerastase line products. Their line is just smart as they have started putting ingredients in their products that protect and nourish the hair just like the skin. The product is light, smells amazing and makes my hair more shiny
bjl2112 –
Girlfriend Approved
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
nim –
It has a good fragrance but doesn’t help with frizzy hair until used in large quantities.
Aurelie –
Les cheveux sont protégés et la coiffure est améliorée
Alireza –
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!
haya –
مره زين
Diana Vig –
Okay, so let’s be real — this kind of product is impossible to review right away. You can’t just spray it once and declare, “Wow, my hair is saved forever!” You only truly know if it works after weeks (or months) of heat styling, when you start noticing whether your hair still breaks or not. I’ve only been using this heat protectant for about a month, so I can’t yet say if it’s a total miracle. But here’s what I can tell you so far.My hair is bleached blonde, which means it needs constant attention, moisture, and protection to avoid dryness and breakage. I’m very picky with anything that touches my hair. And this spray? Honestly, it surprised me in the best way.First, the texture — it’s not your usual liquid spray. It’s got this creamy consistency, almost like a lightweight lotion, but somehow it still sprays evenly! I find that absolutely genius. It feels richer and more nourishing, which gives me extra peace of mind knowing my hair is actually being coated with something protective, not just misted with water.The scent is pleasant — soft, fresh, and clean. If I’m being totally honest, I could imagine it being a bit more “girly,” maybe something floral or sweet, but I get why they went for a more neutral fragrance. It makes sense — guys use heat protectants too.Overall, I’m really enjoying this product so far. It’s a must-have in any hair care routine if you don’t want your strands to snap off every time you blow dry or straighten. That was my problem for years — my hair just wouldn’t grow past a certain length because it kept breaking.So while I can’t say yet if this will be a total game-changer in the long run, I can already tell it’s different. Creamy, protective, pleasant — and honestly, kind of revolutionary for a heat protectant.