KÉRASTASE Premiere Anti-Frizz Hair Repair Serum — Strengthening Treatment, Heat Protects to 450°F

KÉRASTASE Premiere Anti-Frizz Hair Repair Serum is a leave-in treatment that repairs weakened fibers, seals split ends and tames frizz while protecting hair from heat up to 450°F.

This concentrated serum targets broken bonds and surface roughness to improve manageability and shine. Formulated with peptides to reinforce strands and glycine to help reconnect keratin links, the lightweight formula absorbs quickly without weighing hair down. Use it on towel-dried hair before blow-drying or heat styling to reduce breakage, lock out humidity and get visibly smoother, glossier results.

How does this serum rebuild damaged hair?

The serum combines peptide technology with glycine to support the hair’s internal structure and smooth the cuticle. Peptides help reinforce weakened fiber, while glycine assists in reconnecting broken keratin links to reduce snap and shedding.

• Peptides strengthen individual hair strands from within.
• Glycine supports bond reformation between keratin chains.
• Regular use reduces visible breakage and split-end appearance.

Will it control frizz and humidity on humid days?

Yes — the formulation creates a protective, smoothing barrier that repels moisture to minimize frizz triggered by humidity. The result is an easier-to-style surface and longer-lasting smoothness in damp conditions.

• Repels humidity to prevent cuticle swelling and frizz.
• Leaves a sleek finish that resists flyaways.
• Helps styles stay smoother between washes.

Can this serum protect my hair from heat styling?

The product offers heat protection up to 450°F, making it suitable for blow-drying, flat irons and curling tools at common styling temperatures. It shields the hair surface while the active ingredients work to strengthen fibers against thermal stress.

• Thermal barrier up to 450°F for heat styling.
• Use before blow-drying or tool styling for best protection.
• Lightweight texture won’t leave residue or stiffness.

How do I use the serum for best results?

Apply a small amount to towel-dried hair, focusing on mid-lengths and ends, then leave in and proceed to blow-dry or style. For thicker or very damaged hair, use a few extra drops; for fine hair, start with a pea-sized amount to avoid weighing strands down.

• Apply on towel-dried hair; do not rinse.
• Distribute evenly through mid-lengths and ends with fingers or a comb.
• Blow-dry and style as usual for smoother, shinier results.

Who is this for: KÉRASTASE Premiere Anti-Frizz Hair Repair Serum is designed for anyone with weakened, chemically treated or heat-styled hair seeking stronger fibers, reduced split-end appearance and lasting frizz control. It suits all hair types wanting lightweight repair, thermal protection and a polished finish without build-up.

Ingredients

AQUA / WATER / EAU • ISOPROPYL MYRISTATE • DIMETHICONE • TRIETHANOLAMINE • AMODIMETHICONE • PARFUM / FRAGRANCE • PHENOXYETHANOL • CARBOMER • POLYQUATERNIUM-4 • POTATO STARCH MODIFIED • LIMONENE • HYDROXYPROPYL GUAR • BEHENTRIMONIUM CHLORIDE • HYDROLYZED VEGETABLE PROTEIN PG-PROPYL SILANETRIOL • GLYCINE • TRIDECETH-6 • ISOPROPYL ALCOHOL • LINALOOL • CETRIMONIUM CHLORIDE • CITRAL • COUMARIN • BENZYL SALICYLATE • SODIUM BENZOATE • BENZYL ALCOHOL • CITRONELLOL • ALPHA-ISOMETHYL IONONE • POTASSIUM SORBATE • GERANIOL