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

Price: $50.00
(as of Mar 19, 2026 04:01:34 UTC – Details)

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.

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.

1 Ingredients

2 Fusio-Dose

3 Diagnosis

Discover Genesis
Nutri-Fortifiant Shampoo

Gently Cleanses Scalp and HairIntensely Moisturizes and Easily DetanglesStrengthens Hair Weakened by Heat Damage and Brushing

Hydra-Fortifiant Shampoo

Gently Cleanses Scalp and Hair to Remove Excess BuildupStrengthens Hair Weakened by Heat Damage and BrushingNourishes and Easily Detangles Hair

Renforcateur Conditioner

Intensely Moisturizes and Adds BodyStrengthens Hair Weakened by Heat Damage and BrushingEasily Detangles and Prevents Split Ends

Reconstituant Hair Mask

Intensely Nourishes and Hydrates HairStrengthens Hair Weakened by Heat Damage and BrushingSmooths and Easily Detangles

Defense Thermique Hair Serum

Protects Against Heat StylingDelivers Up to 24 Hours of Frizz ProtectionStrengthens Hair Weakened from Brushing and Over-Styling

Fortifiant Hair Serum

Strengthens Hair Weakened by Heat and BrushingHydrates Hair and Adds ShineHas a Lightweight, Non-Greasy Finish

What is the fragrance in Defense Thermique Blow Dry Primer?

Inspired by the energy flowing from modern colognes, Genesis fragrance is a bright, invigorating scent of bergamot & a hint of aromatic green.

What is the difference between Resistance and Genesis range?

Genesis offers a dual benefit for women experiencing hair-fall: reducing hair-fall due to breakage from brushing. Resistance is for damaged to very damaged hair from chemical aggression and helps to repair the hair fiber’s strength.

Should I use Defense Thermique Blow Dry Primer on wet or dry hair?

While we recommend using Defense Thermique Blow Dry Primer on damp hair, it can also be used on dry hair before applying heat styling tools. Use Defense Thermique Blow Dry Primer on damp hair before applying heat from blow drying.

Will Defense Thermique Blow Dry Primer weigh my hair down?

No, Defense Thermique Blow Dry Primer is light enough to leave hair with no weigh down while also leaving it silky and shiny.

What’s the best way to use Defense Thermique Blow Dry Primer?

Spray Defense Thermique Blow Dry Primer into palms and work product from the nape towards the front hair line. Blow dry hair 50% and spray a light mist of product over ends and finish styling.

Explore the Genesis Collection

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Customer Reviews

4.6 out of 5 stars 1,797

4.6 out of 5 stars 6,142

4.6 out of 5 stars 2,570

4.7 out of 5 stars 793

4.6 out of 5 stars 5,145

4.4 out of 5 stars 1,794

Price

$50.00$50.00

$46.00$46.00

$46.00$46.00

$68.00$68.00

$50.00$50.00

$64.00$64.00

Hair Type

Hair prone to breakage & fall

Normal to dry, weak hair

Normal to oily, weak hair

Hair prone to breakage & fall

Hair prone to breakage & fall

Hair prone to breakage & fall

Purpose

Light, fortifying conditioner

Fortifying shampoo

Delicate fortifying shampoo

Intense fortifying hair mask

Fortifying heat protectant

Daily fortifying serum

Benefit

Immediate strength & softness

Intensely nourish & detangle

Gentles cleanse & strengthen

Smooth, detangle, & strengthen

Adds shine & prevents frizz

Strengthen hair & reduce fall

Key Ingredient

Ginger root

Ginger root

Ginger root

Ginger root

Ginger root

Ginger root

Usage

Can be used daily

Can be used daily

Can be used daily

Use once a week

Use when blow drying & styling

Can be used daily

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: #7,925 in Beauty & Personal Care (See Top 100 in Beauty & Personal Care) #29 in Hair Thermal Protection Sprays
Customer Reviews: 4.6 4.6 out of 5 stars (5,145) 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); } }); });
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