KERASTASE Genesis Défense Thermique Heat Protectant 150ml

KERASTASE Genesis Défense Thermique Heat Protectant 150ml is a lightweight fortifying blow-dry treatment for weakened hair prone to hair fall caused by breakage.

Part of the KERASTASE Genesis anti hair-fall range, its milky leave-in formula helps strengthen weakened hair, reduce breakage and protect against heat up to 220°C without weighing hair down. It also provides hydration, helps control frizz and leaves hair softer, smoother and shinier.

Powered by Ginger Root Extract and Edelweiss Native Cells, Défense Thermique is particularly useful for weakened hair exposed to regular brushing, blow-drying and heat styling.

Strengthen → Reduce Breakage → Heat Protect → Hydrate → Control Frizz → Smooth

What Is It?

Défense Thermique is the fortifying heat-protection treatment within the KERASTASE Genesis collection.

It is designed specifically for hair experiencing hair fall due to breakage, rather than treating medical or root-related hair loss.

KERASTASE officially describes it as an anti hair-fall fortifying blow-dry fluid for weakened hair prone to falling due to breakage.

Its main functions are:

Anti-Breakage + Heat Protection + Strengthening + Hydration + Anti-Frizz

Why You'll Love It

• Fortifying heat protectant
• Designed for weakened hair
• Helps reduce hair fall caused by breakage
• Helps strengthen fragile hair
• Provides heat protection up to 220°C
• Helps protect against blow-drying damage
• Helps protect against styling damage
• Provides hydration without heaviness
• Helps detangle hair
• Helps reduce brushing-related breakage
• Controls frizz
• Leaves hair softer
• Improves shine
• Lightweight milky texture
• Ginger Root Extract
• Edelweiss Native Cells
• Leave-in formula
• 150ml

KERASTASE reports 99.3% less breakage and 88% more hydrated/nourished hair under the specific instrumental-test conditions referenced by the brand.

Who Is It For?

Ideal for:

Weakened hair
Fragile hair
Breakage-prone hair
Hair fall caused by breakage
Heat-damaged hair
Hair regularly blow-dried
Hair regularly heat-styled
Hair prone to frizz
Dry weakened lengths
Hair prone to brushing damage
Hair needing lightweight strengthening care

The distinction is important:

Genesis targets weakened hair prone to hair fall caused by breakage.

It should not be presented as a medical hair-loss treatment.

Pair Me With

KERASTASE Genesis Bain Hydra-Fortifiant Shampoo – Lightweight fortifying shampoo for weakened hair prone to hair fall caused by breakage.

KERASTASE Genesis Fondant Renforçateur Conditioner – Strengthening conditioner for weakened hair prone to breakage.

KERASTASE Genesis Sérum Anti-Chute Fortifiant Anti Hair-Fall Serum 90ml– Daily fortifying scalp serum for weakened hair prone to hair fall.

Recommended routine:

Bain Hydra-Fortifiant → Fondant Renforçateur → Défense Thermique → Sérum Anti-Chute Fortifiant

For thicker or drier weakened hair, Bain Nutri-Fortifiant and Masque Reconstituant can provide a richer Genesis routine.

Genesis Defense Thermique | Blow Dry Cream | Kérastase UK

On Towel-Dried Hair

Apply 2–4 pumps, depending on hair length and thickness.

Distribute through the lengths to the ends.

Comb through to distribute evenly.

Proceed with blow-drying or allow the hair to air-dry.

Do not rinse.

On Dry Hair

Apply a small amount after blow-drying or air-drying as a finishing treatment to help tame frizz and improve shine.

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