KÉRASTASE Resistance Extentioniste Scalp & Hair Serum, 1.7 oz — Leave-In Ceramide Strengthening

KÉRASTASE Resistance Extentioniste Scalp & Hair Serum is a concentrated leave-in treatment that soothes the scalp and reinforces hair fibers to support healthier lengths and restored ends.

This energizing scalp serum combines targeted ingredients like ceramides with a lightweight, non-greasy texture to protect and comfort the scalp while strengthening fragile hair. Designed to fit into a weekly routine, the formula aims to reduce breakage and help hair appear stronger and more resilient from root to tip. Use it alongside other products from the Resistance Extentioniste range for a more complete strengthening regimen.

How does this serum help hair feel stronger?

The serum delivers ceramide-rich nutrition to the scalp and strands, which helps reinforce the hair fiber and improve elasticity. By repairing weakened areas and smoothing cuticles, it minimizes the visible effects of damage and reduces the frequency of split ends.

• Contains ceramides to support fiber repair and elasticity
• Targets weakened points to lower breakage risk
• Lightweight formula avoids weighing down fine or long hair

Can it calm and protect the scalp?

Yes — the serum soothes sensitized scalps with a non-oily texture that absorbs quickly. The formulation aims to purify and shield the scalp surface without leaving residue, creating a healthier foundation for hair growth and styling.

• Non-greasy application leaves scalp comfortable
• Purifying action helps maintain a balanced scalp environment
• Fast-absorbing finish suitable before styling

How should I use the Extentioniste Scalp & Hair Serum for best results?

Apply the serum directly to the scalp in small doses, massaging it in to ensure even coverage. It’s recommended to use three pipettes once or twice a week, then continue with your usual styling routine — no rinsing needed.

• Use 3 pipettes per application, once or twice weekly
• Massage into scalp and roots section by section
• Follow with styling; no rinse required

Will this work with my existing routine?

The serum is formulated to integrate smoothly into most haircare regimens and plays well with other Resistance Extentioniste products. For hair that’s weakened or frequently styled, pairing it with the line’s shampoo and conditioner intensifies the strengthening benefits.

• Compatible with daily shampoos and conditioners
• Enhanced results when used with Extentioniste Shampoo & Conditioner
• Suitable for all hair types, including color-treated hair

Who this product is for: Ideal for anyone seeking stronger, longer-looking hair — especially those with damaged, sensitized, or breakage-prone lengths. If you want a lightweight weekly scalp treatment that supports fiber repair, reduces the appearance of split ends, and leaves the scalp feeling balanced, this serum is a targeted option to add to a preventive strengthening routine.

Ingredients

Water, Polyquaternium-37, Paraffinum Liquidum / Mineral Oil, Amodimethicone, Polysorbate 2, Quaternium-7, Stearyl Alcohol, Menthoxypropanediol, Behentrimonium Chloride, Safflower Glucoside, Maltodextrin, Propylene Glycol, Candelilla Cera / Candelilla Wax, Ppg-1 Trideceth-6, Propanediol, Chlorhexidine Digluconate, Isopropyl Alcohol, Trideceth-6, Acrylates Copolymer, Sorbitan Oleate, Polyquaternium-11, Rose Extract, 2-Oleamido-1, 3-Octadecanediol, Cetrimonium Chloride, Camellia Sinensis Leaf Extract, Xanthan Gum, Tocopherol, Bht, Sodium Citrate, Fragrance.