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KÉRASTASE

Kerastase Genesis Thermique Blow Dry Primer Heat Protectant for Weak or Damaged Hair Anti-Breakage Detangles and Hydrates without

4.6

$87.50

About this item

  • Defense Thermique Blow Dry Primer: A fortifying heat protectant spray for hair that is prone to falling due to breakage from brushing. Helps prevent split ends and leaves hair shiny & silky
  • Benefits: Strengthens and protects for heat styling. Enriched with ginger root and edelweiss native cells for 24H protection against frizz even in high conditioners of humidity.
  • Additional Benefits: After use, 99% less hair fall due to breakage from brushing and 88% experience smoother and conditioned hair. Leaves hair easy to detangle and calms down frizz
  • Suggested Use: Apply a small amount of treatment to lengths. Style as normal. Do not rinse. Can also be used on dry hair, to tame frizz and smooth ends. In case of contact with eyes, rinse immediately
  • Genesis Collection: Use along with Genesis Bain Hydra-Fortifiant Shampoo & Fondant Renforcateur Conditioner for hair that is healthy-looking through boosted nourishment & protection and less hair fall due to breakage
  • Product description Fortify Hair Prone To Falling Genesis Our hair care collection that treats hair fall due to hair breakage from brushing. The Genesis collection is a dual action fortifying system professionally formulated to strengthen hair and reduce hair breakage. Previous page Expert Formulas Powered by Edelweiss Native Cells and Ginger Root Edelweiss Native Cells & Ginger Root: Detangle, moisturize, and increase strength and softness. Fusio-Dose Professional In-Salon Treatment Instant Transformation, Infinite Possibilities. In-Salon Service Your appointment Make an appointment in your Kérastase salon for a personalized hair diagnosis. Next page 1 Ingredients 2 Fusio-Dose 3 Diagnosis Discover Genesis Previous page Nutri-Fortifiant Shampoo Gently Cleanses Scalp and Hair Intensely Moisturizes and Easily Detangles Strengthens Hair Weakened by Heat Damage and Brushing Discover Hydra-Fortifiant Shampoo Gently Cleanses Scalp and Hair to Remove Excess Buildup Strengthens Hair Weakened by Heat Damage and Defense Thermique Blow Dry Primer: A fortifying heat protectant spray for hair that is prone to falling due to breakage from brushing. Helps prevent split ends and leaves hair shiny
Specification

Product facts

Key details

Hair Type
Straight, Wavy, Curly, and Coily Hair
Material Type Free
Sulfate Free
Scent
Floral
Liquid Volume
150 Milliliters
is_discontinued_by_manufacturer
No

Dimensions and fit

dimensions
‎ 1.57 x 1.57 x 7.09 inches; 6.3 ounces
Product Benefits
Enriched with ginger root and edelweiss native cells for 24H protection against frizz and humidity
product_dimensions
1.57 x 1.57 x 7.09 inches; 6.3 ounces

Technical specifications

item_model_number
E3244800

Item information

manufacturer
Kerastase
best_sellers_rank
#7,195 in Beauty & Personal Care ( See Top 100 in Beauty & Personal Care ) #26 in Hair Thermal Protection Sprays
Overview

About this item

  • Defense Thermique Blow Dry Primer: A fortifying heat protectant spray for hair that is prone to falling due to breakage from brushing. Helps prevent split ends and leaves hair shiny & silky
  • Benefits: Strengthens and protects for heat styling. Enriched with ginger root and edelweiss native cells for 24H protection against frizz even in high conditioners of humidity.
  • Additional Benefits: After use, 99% less hair fall due to breakage from brushing and 88% experience smoother and conditioned hair. Leaves hair easy to detangle and calms down frizz
  • Suggested Use: Apply a small amount of treatment to lengths. Style as normal. Do not rinse. Can also be used on dry hair, to tame frizz and smooth ends. In case of contact with eyes, rinse immediately
  • Genesis Collection: Use along with Genesis Bain Hydra-Fortifiant Shampoo & Fondant Renforcateur Conditioner for hair that is healthy-looking through boosted nourishment & protection and less hair fall due to breakage
  • Product description Fortify Hair Prone To Falling Genesis Our hair care collection that treats hair fall due to hair breakage from brushing. The Genesis collection is a dual action fortifying system professionally formulated to strengthen hair and reduce hair breakage. Previous page Expert Formulas Powered by Edelweiss Native Cells and Ginger Root Edelweiss Native Cells & Ginger Root: Detangle, moisturize, and increase strength and softness. Fusio-Dose Professional In-Salon Treatment Instant Transformation, Infinite Possibilities. In-Salon Service Your appointment Make an appointment in your Kérastase salon for a personalized hair diagnosis. Next page 1 Ingredients 2 Fusio-Dose 3 Diagnosis Discover Genesis Previous page Nutri-Fortifiant Shampoo Gently Cleanses Scalp and Hair Intensely Moisturizes and Easily Detangles Strengthens Hair Weakened by Heat Damage and Brushing Discover Hydra-Fortifiant Shampoo Gently Cleanses Scalp and Hair to Remove Excess Buildup Strengthens Hair Weakened by Heat Damage and Defense Thermique Blow Dry Primer: A fortifying heat protectant spray for hair that is prone to falling due to breakage from brushing. Helps prevent split ends and leaves hair shiny

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Customer reviews

8 reviewsPositive

Rated 4.6/5 across 8 reviews — highly regarded by customers.

  • 88% of sampled reviews give 4–5 stars.

Customers say

Customer summary is not available yet.

Reviews with images

Customer review image for 💗🌸Customer review image for 💗🌸Customer review image for Highly recommended product . Kerastase Genesis Defense Thermique.
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★★★★★

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. Read more

Krishayna Miller
★★★★★

💗🌸

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. Read more

Customer review image for 💗🌸Customer review image for 💗🌸
Emily
★★★★★

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. Read more

LM
★★★★★

Wonderful for hair

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

Candice W.
★★★★★

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! Read more

Customer
★★★★★

Highly recommended product . Kerastase Genesis Defense Thermique.

My hair was very damaged and brittle, but from the very first application of Kérastase Genesis Défense Thermique, I noticed an incredible change. It’s now softer, more manageable, and protected from heat. Highly recommended for weak and damaged hair!🥰🥰🥰 Read more

Customer review image for Highly recommended product . Kerastase Genesis Defense Thermique.
Yanet
★★★★☆

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. Read more

Rebecca Fray
★★★★★

Great for fine frizzy hair

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. Read more

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