chevron-right SHOP BY BRAND chevron-right KÉRASTASE chevron-right Genesis chevron-right Defense Thermique
Defense Thermique - Genesis | L'Oréal Partner Shop
Defense Thermique - Genesis | L'Oréal Partner Shop
Defense Thermique - Genesis | L'Oréal Partner Shop
Defense Thermique - Genesis | L'Oréal Partner Shop
Defense Thermique - Genesis | L'Oréal Partner Shop
Defense Thermique - Genesis | L'Oréal Partner Shop
chevron-left
Defense Thermique - Genesis | L'Oréal Partner Shop
Defense Thermique - Genesis | L'Oréal Partner Shop
Defense Thermique - Genesis | L'Oréal Partner Shop
Defense Thermique - Genesis | L'Oréal Partner Shop
Defense Thermique - Genesis | L'Oréal Partner Shop
Defense Thermique - Genesis | L'Oréal Partner Shop
chevron-right
Description

Genesis is the first dual action anti-fall haircare range: FOR ALL WOMEN, IN ALL LIFESTYLES, WITH ALL DEGREE OF HAIR FALL.
Powered with a cocktail of highly efficient ingredients to instantly strengthen and thicken the hair fiber for an immediate fuller look with more fiber strength, more fiber retention* and -84% less hair-fall**.

 

*Clinical study, 99 people, 6 weeks use.
**hair-fall due to breakage. Instrumental test on Bain Nutri-fortifiant + Masque Reconstituant + Ampoule/Sérum Aminexil.

 

HOW DOES GENESIS  WORK?
A double action for your client: 
Instantly: PROTECTS AGAINST DAILY EXTERNAL AGGRESSOR AND ANTIOXIDES thanks to Ginger roots and Edelweiss native cells.
Long Term: STOP HAIR-FALL FORTIFIES HAIR ANCHORAGE & RETENTION AND REDUCE HAIR-FALL FROM THE ROOTS thanks to Aminexil.

 

Défense Thermique benefits:
- Detangles and hydrates without frizz. 
- 24H protection against frizz even in high conditions of humidity. 
- Protects hair from blow-dry heat. 
- Helps to prevent split ends. 
- Leaves hair shiny and silky. 
- 99% less hair fall due to breakage from brushing*. 
- 49% softer hair*.

*After application of Défense Thermique.

 

WHO IS IT FOR? 
Genesis targets every woman with hair fall need that would be efficient, convenient and pleasurable with :
- Instant result of hair care
- Efficacy of anti-hair fall solutions

How To Use

Prime with the Défense Thermique :

Step 1: Apply on wet lengths.
Step 2: Blow dry.
In case of contact with eyes, rinse them immediately and thoroughly.

 

Learn more on Access

Ask more information about this product
Ingredients

Genesis Défense Thermique is enriched with GINGER ROOT and EDELWEISS NATIVE CELLS.

GINGER ROOTS: Known for its ability to protect against daily external aggressors.

EDELWEISS NATIVE CELLS: Capable to resist the most extreme conditions and is known in skincare for its antioxidants. It also has power & collagen-preserving properties.


INGREDIENTS
AQUA / WATER / EAU • COCOS NUCIFERA OIL / COCONUT OIL • AMODIMETHICONE • POLYQUATERNIUM-37 • PHENOXYETHANOL • PROPYLENE GLYCOL DICAPRYLATE/DICAPRATE • XYLITYLGLUCOSIDE • SODIUM HYDROXIDE • ANHYDROXYLITOL • XYLITOL • DIMETHICONE PEG-7 PHOSPHATE • PPG-1 TRIDECETH-6 • TRIDECETH-6 • BEHENTRIMONIUM CHLORIDE • LIMONENE • XYLOSE • ETHYLHEXYLGLYCERIN • SORBITAN OLEATE • LINALOOL • ISOPROPYL ALCOHOL • CETRIMONIUM CHLORIDE • GLYCERIN • HYDROLYZED VEGETABLE PROTEIN PG-PROPYL SILANETRIOL • BENZYL SALICYLATE • COUMARIN • ZINGIBER OFFICINALE ROOT EXTRACT / GINGER ROOT EXTRACT • CITRAL • BENZYL ALCOHOL • CITRONELLOL • BENZYL BENZOATE • LEONTOPODIUM ALPINUM CALLUS CULTURE EXTRACT • POTASSIUM SORBATE • TOCOPHEROL • CITRIC ACID • XANTHAN GUM • DIPEPTIDE DIAMINOBUTYROYL BENZYLAMIDE DIACETATE • PARFUM / FRAGRANCE

Rating & Reviews

882 reviews
5 stars
( 631)
4 stars
( 166)
3 stars
( 40)
2 stars
( 15)
1 star
( 30)
5
4.5 / 5 stars

Descabelada

4

1.746196288E12 02/05/2025

Good

I was looking for a product to protect my hair. It’s really good, but I will try another one. I was reading and I think kerastase has others stronger than this one.

Originaly posted on  kerastase-usa.com

Banana5555

5

1.745964904E12 29/04/2025

One of my faves!

Obsessed with this product! Use it daily part of my routine!

Originaly posted on  kerastase-usa.com

Alby15

5

1.745863208E12 28/04/2025

Simply exceptional

[This review was collected as part of a promotion.] The change in my hair with this heat protector has simply been wonderful, I'm loving it

Originaly posted on  kerastase-usa.com

JessieLyn

5

1.745857809E12 28/04/2025

Amazing detangler

This is an amazing leave in conditioner and is great at detangling. My hair is very fine and tangled easily when washing, but this product it brushes out quickly. I love the smell of it.

Originaly posted on  kerastase-usa.com

Miss A

5

1.745884805E12 28/04/2025

Favorite hair ritual

[This review was collected as part of a promotion.] I love the gentleness , fragrance and protection that this gives my hair

Originaly posted on  kerastase-usa.com

Dee123

4

1.745848808E12 28/04/2025

Works well

I recently purchased this product for the first time and was not disappointed. It left my hair soft and manageable and smelling great!

Originaly posted on  kerastase-usa.com

CarlaC

5

1.745387107E12 23/04/2025

Impressive!!!

[This review was collected as part of a promotion.] I've only just started using this, but I already love how lightweight it feels on my hair. It doesn't leave any residue, and my hair feels soft and smooth after styling. There's also a lovely subtle scent that's not overpowering Excited to see long-term results with heat protection!

Originaly posted on  kerastase-usa.com

Anonymous

5

1.745186409E12 20/04/2025

Exactly what I was looking for

[This review was collected as part of a promotion.] This thermique proctector really leave my hair smooth without any sensation of it being burnt

Originaly posted on  kerastase-usa.com

Anonymous6

1

1.745336249E12 22/04/2025

Disappointed

Hoping this would work however could not get past the smell

Originaly posted on  kerastase-usa.com

Reply from Consumer Care Center

Hi Anonymous6, we appreciate you reaching out about Defense Thermique Heat Protecting Spray. We are sorry to hear you are not a fan of the fragrance. Your feedback is valuable to us and will be shared with the appropriate teams for review. It is our hope that you will continue to explore the many products we offer with greater confidence and satisfaction in the near future.

Ana3012

5

1.744941605E12 17/04/2025

Excellent product

This product makes my hair so soft and shine. Even I use hair dye my hair keeps soft and shiny when I use this product

Originaly posted on  kerastase-usa.com

AnnieG

5

1.744810208E12 16/04/2025

Favorite heat protector

I Love this heat protector. It smells so good and protects my hair. Leaves my hair smooth without frizz.

Originaly posted on  kerastase-usa.com

Miss Jeanette

5

1.744810208E12 16/04/2025

Love this product!

Love the way my hair feels after using it plus it smells good!

Originaly posted on  kerastase-usa.com

K10inNH

5

1.744575309E12 13/04/2025

Love this product and the scent is so nice!

During Covid, I got the virus and as a result, my thick hair started falling out. I was devastated and a friend turned me onto the Kerastase Genesis line. I have used it ever since because it restored my hair back to the thickness that it once was (maybe even more so). I have since recommended this line to SO MANY of my friends (in their 50's) who are suffering from hair loss, and they, like me, don't regret purchasing this!

Originaly posted on  kerastase-usa.com

Beachbum

5

1.744740023E12 15/04/2025

Live this stuff

[This review was collected as part of a promotion.] I absolutely love this spray smells amazing and makes my hair look great.

Originaly posted on  kerastase-usa.com

Cheri S

5

1.744569916E12 13/04/2025

So far, so good

I have recently begun using Kerastase products as my fine, thin, color-treated hair has been looking scary! I really like the way this product smells and the way my hair feels; time will tell if the heat protection makes a difference in my ‘do!

Originaly posted on  kerastase-usa.com

Oks1212

5

1.74430171E12 10/04/2025

the BEST

This is the best heat protectant leave in conditioner. i have super fine and somewhat dry hair, this product makes my hair look like it was professional styled on a supermodel. I always have 2 bottles as back up. Also smells absolutely amazing

Originaly posted on  kerastase-usa.com

YvetteV

5

1.744308908E12 10/04/2025

Best MilkSpray out there!

This is a great out the shower, use while still wet product I use not only on myself but my son who is growing out his hair. Love the way it sprays. Gets all over coverage when using.

Originaly posted on  kerastase-usa.com

Aquirogar02

5

1.744299011E12 10/04/2025

Love the Defense Thermique Heat Protecting Spray!

[This review was collected as part of a promotion.] I really liked the Defense Thermique Heat Protecting Spray! It leaves my hair feeling soft and provides amazing protection. After using it with my blow dryer or flat iron, my hair looks so much shinier and smoother. The best part is the incredible smell—it’s so refreshing! I definitely recommend it for anyone who wants to protect their hair while keeping it sleek and shiny.

Originaly posted on  kerastase-usa.com

Kshep76

5

1.744299011E12 10/04/2025

Works great!

[This review was collected as part of a promotion.] I like this heat protectant. I thought it would be too thick or feel greasy, but it doesn't. I use after I towel dry my hair, then blow dry.

Originaly posted on  kerastase-usa.com

Krista G

4

1.744240506E12 09/04/2025

Review

It’s a good product, helps with heat protection and smells nice

Originaly posted on  kerastase-usa.com

Vicky G

3

1.744296335E12 10/04/2025

Meh

[This review was collected as part of a promotion.] I did not find this leave in particularly helpful untangling my hair nor did I care for the scent.

Originaly posted on  kerastase-usa.com

Reply from Consumer Care Center

Hello Vicky G, thanks for sharing your feedback on our Defense Thermique Heat Protecting Spray. We strive to deliver products that exceed the expectations of our consumers, therefore, we always welcome all feedback, whether positive or negative. Your feedback allows our team the opportunity to improve our products. We thank you for the time you have taken to share these comments.

Leela78

5

1.743983105E12 06/04/2025

My go-to heat protectant

I won't go without this heat protectant. It's absolutely perfect because it's very lightweight, it smells amazing, and it doesn't make my hair greasy.

Originaly posted on  kerastase-usa.com

AnnaVkl

5

1.743775209E12 04/04/2025

Very good

[This review was collected as part of a promotion.] This is a really good product, high quality. It doesn't weigh down the hair. After using it, the hair is soft and shiny.

Originaly posted on  kerastase-usa.com

Lilo07

5

1.743713131E12 03/04/2025

Defense termique

[This review was collected as part of a promotion.] I hope it protects my hair. I'm loving this line is perfect

Originaly posted on  kerastase-usa.com

LJohnson

4

1.743699615E12 03/04/2025

Nice smell and texture

Smells nice. Doesn’t leave my hair feeling tacky like my previous heat protectant. Too early to know if it’s keeping my hair from getting damaged, but I’ll stick with it long enough to find out. Will be 5 stars if it’s doing its job.

Originaly posted on  kerastase-usa.com

Hurley

5

1.743689712E12 03/04/2025

Smells beautiful

This product conditions and protects your hair. It also smells beautiful. You can still smell it a few days after.

Originaly posted on  kerastase-usa.com

JMendez

1

1.74368881E12 03/04/2025

Did NOT like

I have thin, 3a/3b curls, oily scalp usually and dry ends. I do blow-dry my hair after every wash because it's easier to manage. The nozzle of this spray bottle is so awful considering how expensive this product is. It dispenses the product in a stream which does not work for me, I have tried to spray from afar and it wastes too much product. I have also tried to spray it on my hands to then scrunch it into my hair and that also did not work. I also tried to spray it aiming directly at the ends and after blowdrying, my hair was so greasy and weighed down. I know my hair and I know it's because the bottle dispenses too much product. It's not the result you want when you have thin hair and your scalp is already greasy. You either get too much or too little with this applicator. It also caused me to have frizz. I should've returned this when I had the chance or given it away. I still have about 80% of the bottle left. I wanted to love it because I do enjoy the genesis serum but I will never buy a spray heat protectant again. I bought this along with the Extentioniste Thermique Length Care Gel Cream to compare. And I love the cream better than this spray. The cream is easier to apply because you can control how much you use. My hair is smoother and bouncier. I bought the whole Resistance Therapiste line and use it after every wash and my hair is noticeably better. It's not burned or damaged with styling tools and after my last hair cut 4 months ago, I have not noticed any split ends. I would recommend a cream heat protectant versus a spray one.

Originaly posted on  kerastase-usa.com

Jen Kay R

5

1.743596112E12 02/04/2025

Perfect for combing wet blond highlighted hair

As anyone who regularly highlights their hair blond knows, combing it out after washing can be a nightmare. With fragile tangles everywhere this spray allows your brush (or comb) to gently glide through. As a de-tangeler it is amazing and smells lovely while not leaving a heavy residue (I have thin fine hair) and provides heat protection. I LOVE this product and I have tried them all!

Originaly posted on  kerastase-usa.com

Kerastase Only User

4

1.743509712E12 01/04/2025

Perfect for Finer Hai

I didn't believe much products that claimed to add volume to hair, until this one. It far exceeds that. It makes my fine hair look fuller and thicker! Very impressed!

Originaly posted on  kerastase-usa.com

Mrs Payne

5

1.743299105E12 29/03/2025

It gets Better!!

There is nothing better than this!!! Absolutely love this hair product!

Originaly posted on  kerastase-usa.com

Pretty12

5

1.743043503E12 26/03/2025

I love Thermique Heat Protecting spray

[This review was collected as part of a promotion.] I love Thermique Heat protecting spray, it's light on my hair and protects my hair from my heated styling tools

Originaly posted on  kerastase-usa.com

ReneeK

5

1.742940009E12 25/03/2025

Smooth

This product really helps protect my hair from blow drying it every day.

Originaly posted on  kerastase-usa.com

KJ4547

5

1.743012908E12 26/03/2025

BEST Anti-Frizz Styling product ever!!

The BEST styling, anti frizz, heat protecting product I have ever used! It absolutely does NOT leave hair tacky and sticky like hairspray, like another reviewer said. I think that person must have been reviewing a different product by mistake. This leaves your hair so smooth, free of frizz, easy to blow dry, shiny, and it holds a blow dry so well! THE BEST!! Buy it!!

Originaly posted on  kerastase-usa.com

KPro123

2

1.743019603E12 26/03/2025

Bad Jet Spray

I don’t like the way it sprays… it’s like a fine jet and doesn’t give good coverage. I end up having to spray multiple sprays in my palm and then work it through the hair

Originaly posted on  kerastase-usa.com

Reply from Consumer Care Center

Hi there, we appreciate your feedback on our Defense Thermique Heat Protecting Spray. We understand how disappointing it is to have issues dispensing the product. We make every effort to provide the highest quality products for our consumers and we will be sure to pass your comments along. It is our hope that you will continue exploring our products while finding greater satisfaction in the results they deliver.

Tabetha

5

1.742595311E12 21/03/2025

Love. This!

Excellent product - my fave for days I blow dry. Makes my dry hair feel silky and strong.

Originaly posted on  kerastase-usa.com

Halley kat

5

1.742697906E12 22/03/2025

My go to

[This review was collected as part of a promotion.] This has been my go to for years! Super light, not greasy and smells amazing.

Originaly posted on  kerastase-usa.com

Lina92

5

1.742498109E12 20/03/2025

Love is delicious, it leaves my hair so pretty.

Love is delicious, it leaves my hair so pretty. Les Rasta se is the best

Originaly posted on  kerastase-usa.com

DuckieFox

5

1.742398207E12 19/03/2025

Great for detangling.

I have just started using this product, but so far I like it. It really helps with detangling and smoothing hair. It doesn’t make my hair as shiny as I would like, but I like how it helps with frizz.

Originaly posted on  kerastase-usa.com

Sweet2

5

1.74238561E12 19/03/2025

Great product

This is a solid product for heat protection and damage prevention

Originaly posted on  kerastase-usa.com

Cali425

5

1.742279405E12 18/03/2025

Protection without Weight

[This review was collected as part of a promotion.] Love this for my fine hair! Doesn’t weight my hair down and blow out lasts for 3-4 days. Highly recommend .

Originaly posted on  kerastase-usa.com

Anonymous

5

1.742257805E12 17/03/2025

Great Finishing Product!

Wonderful product; hair feels silky smooth. Highly recommended.

Originaly posted on  kerastase-usa.com

Mh7878

5

1.742170505E12 16/03/2025

Love it!

[This review was collected as part of a promotion.] Favorite heat protector! Light and yet moisturizing!

Originaly posted on  kerastase-usa.com

Mini12

5

1.742137213E12 16/03/2025

Favorite heat protectant spray

Hands down best protectant and smells amazing! Makes your hair feel silky and shiny

Originaly posted on  kerastase-usa.com

Maridds

5

1.742252406E12 17/03/2025

Must have

The best heat protection I have ever used. My hair is smooth and soft.

Originaly posted on  kerastase-usa.com

Grace111111

5

1.742219112E12 17/03/2025

Heat protectant

I use hot tools about 3 days a week. After using this product to have no additional heat damage. Does not make my hair greasy or weighed down, but I don’t use it on my roots.

Originaly posted on  kerastase-usa.com

PaolaD

5

1.742061612E12 15/03/2025

My hair looks different after blowing

[This review was collected as part of a promotion.] I loved the fragance and the texture of the product.

Originaly posted on  kerastase-usa.com

Anonymous

5

1.741708817E12 11/03/2025

The Perfect Products

This product is perfect alongside your flat iron and Humid Weather! My hair looks and feels amazing using Kerastase. After years of trying different products to fight the frizz - I finally found the cure!

Originaly posted on  kerastase-usa.com

Anonymous

5

1.741652109E12 10/03/2025

Love it.......... . ............................

Smells good...................................... .....

Originaly posted on  kerastase-usa.com

AnnaSz

5

1.741392004E12 07/03/2025

Great heat protectant, leaves hair very soft

[This review was collected as part of a promotion.] I have fine hair and I love using this after I shower to blow dry my dry. It leaves my hair soft and does not weigh it down.

Originaly posted on  kerastase-usa.com

Cbear2001

5

1.741573805E12 09/03/2025

Great protector

It works great and smells amazing!! Definitely buy!!

Originaly posted on  kerastase-usa.com

YadiraP

5

1.741374009E12 07/03/2025

Defense Thermique Heat Protecting Spray

Best he.at protecting spay in the market. My hair feels amazing after styling.

Originaly posted on  kerastase-usa.com

Jesska

5

1.741361407E12 07/03/2025

Great

[This review was collected as part of a promotion.] Smells great makes my hair feel soft and silky! Not heavy at all.

Originaly posted on  kerastase-usa.com

Liz WA

5

1.741485605E12 08/03/2025

Silky hair

[This review was collected as part of a promotion.] This makes my hair smell so good and feel so silky. Even better it protects it from heat!

Originaly posted on  kerastase-usa.com

HillaryL

5

1.741300208E12 06/03/2025

Love it!

Smells nice and mists very evenly into my hair. I really love the Genesis line and looking to purchase more!

Originaly posted on  kerastase-usa.com

Ashley713

5

1.741448713E12 08/03/2025

Good even for air drying

Another sample I've tried that got me to buy the rest of the collection, love it!

Originaly posted on  kerastase-usa.com

mrsmelissa

5

1.740871813E12 01/03/2025

Nice product

Nice heat protection that strengthens and gives shine

Originaly posted on  kerastase-usa.com

No public name

5

1.741004113E12 03/03/2025

No title

I have extremely long and thick hair. Been using this product for almost two years now. Applying this product after washing, rinsing and drying my hair leaves it soft and extremely manageable. Could not wear my hair long without this product.

Originaly posted on  kerastase-usa.com

Shak R

4

1.740975306E12 02/03/2025

So far it’s okey

I like everything about this heat spray ;however for some reason it leaves my hair dry.

Originaly posted on  kerastase-usa.com

KellyMH

5

1.740940212E12 02/03/2025

LOVE

I love this heat protectant. I use this most of the time, sometimes using Chroma Thermique Heat Protecting Serum. This one is particularly moisturizing while remaining light, and I feel like this one detangles my hair more easily as my fine hair is prone to tangling during a wash. This also smells fantastic and I feel like it's helping to strengthen my hair during my blow dry.

Originaly posted on  kerastase-usa.com

P Rogers

5

1.740922212E12 02/03/2025

The best heat protector

Amazing product! Really take care of my hair and I’ve been noticing that it looks really smooth and shiny.

Originaly posted on  kerastase-usa.com

KimberlyS

1

1.740583748E12 26/02/2025

scent and texture not typical quality

The scent is overpowering and unpleasant. I was out of the heat protecting creme and decided to try this. I'm sending it back (returns are not free), and ordering the creme. I wish Kerastase had a bigger selection of samples - this could have been avoided.

Originaly posted on  kerastase-usa.com

Reply from Consumer Care Center

Hello KimberlyS, thanks for sharing your honest feedback on our Defense Thermique Heat Protecting Spray. We are genuinely sorry to hear that you had a negative experience with our product. We understand the importance of product design and quality and we apologize for falling short in this area. Please trust us that we will investigate this further and take the necessary steps to improve our product. Your feedback is valuable to us and we appreciate your understanding.

SJules

1

1.740435683E12 24/02/2025

Terrible scent

It has a very strong scent that gives me a headache. It’s not a pleasant scent, either. Other Kerastase products I've used were all chemically scented, but none were so overpowering. I also couldn’t see much of a difference when used before blow drying. I only kept it because they don’t provide free returns. I don’t recommend this product.

Originaly posted on  kerastase-usa.com

Reply from Consumer Care Center

Hello SJules, We are sorry to hear about the experience you had with Defense Thermique Heat Protecting Spray. We want to speak with you directly about it. Please give us a call at 877-748-8357 M-F 9:00 am – 5:00 pm ET for assistance and provide reference 39920868.

Marianna Araujo

5

1.740016806E12 19/02/2025

Must-Have Leave-In with Heat Protection!

Title: “Must-Have Leave-In with Heat Protection!” This leave-in conditioner is a game-changer! My hair feels incredibly soft, frizz-free, and protected from heat styling. It doesn’t weigh my hair down or leave any greasy residue. After two weeks of use, I’ve noticed less breakage and healthier-looking strands. A must-have for anyone who styles their hair regularly!

Originaly posted on  kerastase-usa.com

Wendi B B

3

1.739984624E12 19/02/2025

Nothing special

It’s not as conditioning as I expected. In fact It doesn’t really do much. You have to apply with caution using very little. It will leave your hair feeling coated. It smells good. Overall I will not purchase this again.

Originaly posted on  kerastase-usa.com

Reply from Consumer Care Center

Hi there! Thank you for reaching out about our Defense Thermique Heat Protecting Spray. We're sorry to hear that our product didn't meet your expectations in terms of conditioning and that you experienced a coated feeling. We appreciate you mentioning the need to apply with caution and that you liked the scent. We value your opinion and will take it into consideration as we continue to improve our formulations.

AZ HSS

5

1.740475607E12 25/02/2025

great product but not so great packaging

love the product but the spray itself needs some work. it mists very unevenly and takes extra effort to spread it evenly throughout my hair.

Originaly posted on  kerastase-usa.com

Shary87

5

1.739643309E12 15/02/2025

The best product

Lo amoooo el mejor protector térmico , si quieres que tu pelo esté sano y con un olor rico tienes que usar este protector

Originaly posted on  kerastase-usa.com

Coleys Hair

5

1.739758505E12 16/02/2025

My Go To

I’ve tried MANY other heat defense products, from cheap to super expensive, creams, gels, sprays, etc. and nothing compares to this one. My hair is soooo soft and shiny when I dry then style it after using this.

Originaly posted on  kerastase-usa.com

Maggie507

4

1.739739611E12 16/02/2025

Liked it, didn't LOVE it

I gave this a try, because I love the scent. However, at the end of the day I like the Chroma Thermique Heat-Protecting serum better.

Originaly posted on  kerastase-usa.com

Jaiello

5

1.73955063E12 14/02/2025

Another amazing product

[This review was collected as part of a promotion.] This heat protectant is the most expensive heat protectant I have ever purchased but.. it is also one of the best heat protectants I ever purchased. Love the smell and I have had so much less breakage since using this product. My hair looks so much healthier.

Originaly posted on  kerastase-usa.com

Anonymous

5

1.739679304E12 15/02/2025

Worked really well

Spray to protect your hair from the heat of blow dry, iron, or curly your hair. Smell amazing and your hair smooth and shinny not sticky.

Originaly posted on  kerastase-usa.com

Jennyannie

5

1.739500209E12 13/02/2025

My favorite heat protector.

Love the smell and always leaves my hair frizz free and silky. My new favorite heat protector.

Originaly posted on  kerastase-usa.com

Lisaan

5

1.739498415E12 13/02/2025

Helps with heat

Give this a good spray after you towel dry your hair and before you blow dry and you will not be disappointed! This protecting spray will help keep your hair healthy while you use a blow dryer and straightener. After I used it, my hair looked healthy and voluminous! It's a game changer! All those other sprays never worked for me. This one does, and the smell...glorious!!!

Originaly posted on  kerastase-usa.com

Shantal

5

1.739385012E12 12/02/2025

Reduced hairfall

Love this product , great smell and definately reduced hair fall to an extent

Originaly posted on  kerastase-usa.com

MarcePat

5

1.739332807E12 11/02/2025

Great product

[This review was collected as part of a promotion.] Makes my hair super soft and manageable. Love it. Would buy it again !

Originaly posted on  kerastase-usa.com

Lakegirl

5

1.739154606E12 09/02/2025

Feel Secure with Defense Against Breakage

The heat protecting spray provides a great defense against my hair breaking off while drying my hair. It is easily applied and makes you feel secure that your hair will not be breaking off while drying your hair. Keeps hair moist and shiny.

Originaly posted on  kerastase-usa.com

mabelen

3

1.739198301E12 10/02/2025

Overprice

Good but not enough for the price. It does not work well in my hair

Originaly posted on  kerastase-usa.com

Reply from Consumer Care Center

Hello Mabelen, We are sorry that our Defense Thermique Heat Protecting Spray did not meet your expectations. We strive to deliver products that will be 100% satisfactory to our consumers and want to know when these expectations are not met. We will be passing on your comments to others in our team.

Lori Luv

5

1.738969212E12 07/02/2025

Amazed at this blowout spray!

[This review was collected as part of a promotion.] This spray really surprised me, hair was soft, voluminous and smooth. Sometimes my hair frizzy after blow drying, felt confident this product was protecting my hair, only need a few sprays and wa la gorgeous locks!

Originaly posted on  kerastase-usa.com

Sonic23

4

1.738899907E12 06/02/2025

Amazing

[This review was collected as part of a promotion.] I dry my hair very often. So a thermique heat protection it’s a must of my hair journey, I use this spray and love it

Originaly posted on  kerastase-usa.com

fefe95

5

1.738813503E12 05/02/2025

I am really enjoying this product

I am really enjoying this product, I am on my second bottle and I love the smell and how makes my hair feel.

Originaly posted on  kerastase-usa.com

Happy shopper

5

1.738972809E12 07/02/2025

Great

I like this product smell and dies what it says! I recommend this product

Originaly posted on  kerastase-usa.com

DollyG

5

1.738804506E12 05/02/2025

Smells greats

It leaves my hair very soft and smells amazing. I love the entire line.

Originaly posted on  kerastase-usa.com

Baileyyy

5

1.738636215E12 03/02/2025

Great heat protectant!!

[This review was collected as part of a promotion.] Love this product for when I have to straighten my hair!

Originaly posted on  kerastase-usa.com

Tinkerdust00

5

1.738543531E12 02/02/2025

It smells so nice

It left my bathroom and hair smelling like a hair salon. My hair was soft.

Originaly posted on  kerastase-usa.com

Lina92

5

1.738355415E12 31/01/2025

Love this product

This product is wonderful, I love the way it smells and how it leaves my hair. Honestly, it's the best. Kerastase never lets us down.

Originaly posted on  kerastase-usa.com

Haze3266

4

1.741619713E12 10/03/2025

Unsure

Unsure about this one. I like it but it does leave a certain film on my hair. Need to experiment with the amount i use to see if this improves

Originaly posted on  kerastase-usa.com

Chelsih

5

1.738026022E12 27/01/2025

Best heat protector

[This review was collected as part of a promotion.] I use this dailyy, after every shower! Has kept my hair healthy and soft, also doubles as a Detangler . Perrrfect product! Must haveee!

Originaly posted on  kerastase-usa.com

KVA02_

5

1.738009841E12 27/01/2025

Love my hair

[This review was collected as part of a promotion.] Love love love, mu hair is very oily and fine, i I take care of and maintain my hair from home and for me it is more than a luxury..

Originaly posted on  kerastase-usa.com

Putnam

5

1.739276114E12 11/02/2025

Amazing

[This review was collected as part of a promotion.] This product is amazing!! I have semi curly hair and I use this when I straighten my hair. It leaves it soft and shiny!

Originaly posted on  kerastase-usa.com

rubina

5

1.737837927E12 25/01/2025

cant go without

i love all things Kerastase and this heat protecting spray is my go to

Originaly posted on  kerastase-usa.com

Rosaury

5

1.73766966E12 23/01/2025

Leaves hair soft

I like it because it doesn't leave my hair greasy.😍

Originaly posted on  kerastase-usa.com

Heat Protectant

5

1.73759131E12 22/01/2025

Amazing

I use this every time I wash my hair before I blow dry and straighten. It helps with breakage and damage from the heat. Love it! It also smells amazing!

Originaly posted on  kerastase-usa.com

mel777

5

1.738872297E12 06/02/2025

Me & my daughter love!!

[This review was collected as part of a promotion.] Love the genisus line. This keeps our glorious crowns o silk protected from the heat

Originaly posted on  kerastase-usa.com

Meggie423

3

1.737139845E12 17/01/2025

Smells Great

[This review was collected as part of a promotion.] Overall good product but I prefer the Extenioniste Thermique over this.

Originaly posted on  kerastase-usa.com

Reply from Consumer Care Center

Hi there, Thank you for your feedback. We appreciate you trying Genesis Défense Thermique Heat Protecting Spray and understand your preference for Resistance Extentioniste Thermique. While both offer heat protection, they cater to slightly different hair needs. Extentioniste is excellent for strengthening and promoting length, while Défense Thermique focuses on reducing hair fall due to breakage. It's great that you've found the product that best suits your hair goals.

Anonymous

5

1.737331225E12 19/01/2025

collection great

[This review was collected as part of a promotion.] Great shampoo ever, money is worthy, i love it so much

Originaly posted on  kerastase-usa.com

Stacey317

4

1.737270909E12 19/01/2025

Smells great! Protects hair from heat.

Love this Kerastase line and plan to continue ordering. Seems to add some shine and definitely protects my hair from heat.

Originaly posted on  kerastase-usa.com

Arual251987

5

1.737214221E12 18/01/2025

Amazing!!!! the best!!!!

[This review was collected as part of a promotion.] Excellent, simple to use allowed me to easily choose a suitable of very reasonably price which I could quickly order. Love it!!!!

Originaly posted on  kerastase-usa.com

CaroD

2

1.737054407E12 16/01/2025

Statique, statique…

J’ai jamais eu autant de statique de ma vie avec ce produit.

Originaly posted on  kerastase.ca

Reply from Centre Conseil Consommateur

BonjourCaroD ! Merci de partager avec nous quelques retours sur notre Genesis Défense Thermique. Les commentaires de nos consommateurs sont très importants pour nous et nous aident à améliorer tous nos produits. Nous nous excusons que vous n'ayez pas aimé ce produit et nous apprécions que vous partagiez votre expérience. Nous vous remercions d'avoir essayé ce produit et nous transmettrons vos commentaires aux autres membres de notre équipe.

Mom of 4 Mimi of 5

5

1.736896562E12 14/01/2025

So good for my hair

I love using this product, it makes my hair stronger, softer and easier to comb through

Originaly posted on  kerastase-usa.com

Jayhawk

5

1.736374508E12 08/01/2025

Excellent product

[This review was collected as part of a promotion.] Great product! Leaves my hair soft, smooth, and detangled. Fragrance is great and not overpowering. Will be buying again!

Originaly posted on  kerastase-usa.com

Maureen Turk

5

1.736353829E12 08/01/2025

Holy Grail Heat Protectant

This is my holy grail heat protectant - coupled with the shampoo, conditioner and mask - it’s the best!

Originaly posted on  kerastase-usa.com

    Defense Thermique 150ml

    Kerastase - Genesis

    Product code : 3474636857975

     

     

    Anti Hair-fall Fortifying blow-dry fluid for weakened hair, prone to falling due to breakage. Provides anti-breakage action and heat protection up to 220°C. Ensures optimal hydration without frizz.

    Read less

    To see prices, you must login or register.