KÉRASTASE Genesis Thermique Blow Dry Primer — Heat Protectant 5.1 fl oz, Anti-Breakage & Frizz Control

This lightweight, salon-grade primer uses ginger root and edelweiss native cells to help fortify fragile hair before heat styling. It smooths fiber, reduces friction during brushing, and helps control frizz for a sleeker blowout without weighing hair down. Sulfate-free and quick-absorbing, the formula works on damp or dry hair and pairs with the Genesis collection for fuller-looking, better-conditioned results.

How does this primer protect hair from heat and breakage?

The primer creates a thin protective layer that helps resist thermal stress during blow-drying and styling tools. By reducing friction and smoothing the hair cuticle, it lowers the risk of breakage from brushing and mechanical damage. Regular use before styling supports overall strand resilience.

• Guards hair up to 450°F for thermal protection during hot tools.
• Decreases hair fall caused by breakage during brushing.
• Fortifying actives strengthen fiber to resist mechanical stress.

Will it detangle and control frizz without weighing hair down?

Yes — the formula detangles wet or dry hair, smoothing the surface to make combing and styling easier. It offers 24-hour frizz control even in humid conditions, while leaving a soft, non-greasy finish. The primer is designed to preserve natural movement rather than stiffen the hair.

• Smooths and conditions for easier combing and reduced breakage.
• Helps tame frizz for up to 24 hours, even in humidity.
• Lightweight texture keeps hair flexible and touchable.

How do I use it for the best blow-dry results?

Apply a small amount to lengths and ends on damp hair before blow-drying, then style as usual — do not rinse. It can also be applied to dry hair to smooth flyaways and finish styles. Avoid contact with eyes; rinse immediately if contact occurs.

• Use on damp hair before blow-drying for protection and smoothness.
• Apply sparingly to dry hair to tame frizz and smooth ends.
• Compatible with other Genesis shampoo and conditioner products.

What improvements can I expect after consistent use?

Routine use helps reduce hair fall due to breakage and leaves strands feeling softer and more conditioned. In consumer testing, users reported noticeably less breakage when brushing and a smoother, more manageable finish. Effects build with continued use alongside strengthening care.

• Significant reduction in hair fall from breakage during brushing.
• Improved detangling, softness, and shine after styling.
• Works synergistically with Genesis Bain and Fondant for enhanced results.

Who is this for: KÉRASTASE Genesis Thermique Blow Dry Primer is formulated for people with weak, damaged or thinning hair who regularly heat-style and want to minimize breakage and frizz. It suits anyone looking for a lightweight, sulfate-free priming spray that detangles, hydrates, and strengthens hair before heat application, and who prefers professional-grade care at home.

Ingredients

Water, 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, Behentrimoniumchloride, 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.