KÉRASTASE Genesis Thermique Blow-Dry Primer, 5.1 oz — Heat Protectant to Strengthen, Detangle & Reduce Frizz

KÉRASTASE Genesis Thermique is a leave-in blow-dry primer that shields weakened, breakage-prone hair from heat up to 450°F while detangling, hydrating, and reducing frizz.

This lightweight spray-from-cream primer is made for hair that breaks or sheds during brushing. Formulated with ginger root and edelweiss native cells, it prepares lengths and ends for thermal styling by reinforcing strands, smoothing the cuticle, and improving manageability. Sulfate-free and designed to be applied to damp or dry hair, it slips through tangles so you can style with less pulling and a shinier finish.

How does this primer protect hair during blow-drying?

Genesis Thermique creates a protective film on each strand that reduces direct heat exposure and smooths the hair surface. That barrier helps preserve moisture and lowers friction from styling tools, so hair withstands higher temperatures more safely during styling.

• Heat protection up to 450°F (thermally resistant formula)
• Coats lengths for reduced cuticle damage and breakage
• Sulfate-free formulation to maintain hair’s natural oils

Will it help detangle and reduce breakage from brushing?

The primer is designed to increase slip so combs and brushes glide through wet or dry hair with less force. In consumer testing, users reported substantially less hair fall from breakage after brushing, reflecting easier detangling and gentler styling sessions.

• Visible reduction in hair fall from breakage during brushing
• Improves comb-through on damp hair for faster styling
• Can be used on dry ends to tame knots without re-wetting

What are the key active ingredients and their benefits?

The formula centers on ginger root and edelweiss native cells, combined with Kérastase’s strengthening complexes. Together they target hair fragility by reinforcing fiber structure, calming frizz, and delivering lightweight hydration for a silky, polished result.

• Ginger root: helps fortify strands and support strength
• Edelweiss native cells: protect and smooth cuticles for reduced frizz
• Light conditioning agents: hydrate without weighing hair down

How should I use it for the best blowout results?

Apply a small amount evenly through towel-dried lengths before blow-drying, then style as usual — there’s no need to rinse. It also works as a touch-up on dry hair to smooth flyaways and soften ends between washes.

• Use on damp hair: spray or distribute through lengths then blow-dry
• Use on dry hair: smooth over frizz and ends to refresh styling
• Avoid direct contact with eyes; rinse if contact occurs

Who is this product for? KÉRASTASE Genesis Thermique is suited for anyone with weakened, breakage-prone, or damaged hair who wants a salon-quality blowout with reduced hair fall during brushing. It’s especially helpful for people who use heat tools often and need a lightweight, sulfate-free primer to detangle, hydrate, and keep frizz at bay while strengthening strands for everyday styling. Pair it with the rest of the Genesis range — like the Bain Hydra-Fortifiant shampoo and Fondant Renforcateur conditioner — for a more complete routine aimed at nourishment and breakage control.

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.