KÉRASTASE Heat Protection Serum Ciment Thermique 5.1 fl oz — Blow‑Dry Primer that Strengthens & Hydrates

KÉRASTASE Resistance Heat Protection Serum (Ciment Thermique) is a leave-in blow-dry primer that shields hair from heat up to 450°F while strengthening and hydrating damaged lengths and ends.

Designed for weakened, brittle, or over-processed hair, this lightweight serum from KÉRASTASE's Resistance range works before heat styling to reduce breakage and restore manageability. It combines thermo-protection with moisturizing actives—including resurrection plant sap—to improve elasticity, seal moisture into the fiber, and enhance shine without weighing hair down. Use it as part of a multi-step routine to reinforce hair structure and maintain smoother, more resilient strands between salon services.

How does Ciment Thermique protect my hair during blow-drying and hot styling?

The serum forms a protective layer that helps shield hair from high temperatures up to 450°F, reducing the risk of heat-related weakening. Applied to towel-dried hair, it helps seal the cuticle and maintain hydration so styling causes less friction and breakage.

• Thermo-protection rated up to 450°F for heat tools
• Forms a lightweight barrier on lengths and ends to minimize direct heat damage
• Seals moisture to reduce frizz and improve slip while blow-drying
• Designed to be layered with other KÉRASTASE Resistance products

What measurable benefits will I see on damaged or brittle hair?

Regular use improves hair’s elasticity and visibly reduces the appearance of breakage and split ends over time. The formula nourishes dry areas, enhances shine, and helps hair look smoother and more uniform after styling.

• Reduces breakage by strengthening the hair fiber
• Enhances natural shine and softness on lengths and ends
• Improves manageability for easier detangling and styling
• Helps control flyaways for a cleaner finish

How do I use the serum for best results?

Apply a quarter-size amount to clean, towel-dried hair—focus on mid-lengths and ends, and avoid the roots to keep volume. Do not rinse out; proceed to blow-dry and then finish with hot tools as needed. For a stronger routine, pair with Resistance Extentioniste Conditioner and Therapiste Hair Mask.

• Use on towel-dried hair only; massage through lengths and ends
• No rinsing required—follow immediately with blow-drying
• Safe to layer with other KÉRASTASE Resistance treatments
• Recommended frequency: with each heat-styling session

Can I use this on all hair types and colored or chemically treated hair?

Ciment Thermique is formulated to benefit all hair types that need strengthening or heat protection, including colored and chemically treated hair. It is especially useful for hair that has undergone chemical services or frequent heat styling and needs extra reinforcement.

• Suitable for fine, medium, and coarse textures
• Compatible with color-treated and chemically processed hair
• Lightweight formula avoids weighing down finer hair
• Works well in combination with restorative Resistance products

Who is this for: KÉRASTASE Resistance Heat Protection Serum (Ciment Thermique) is aimed at anyone whose hair shows signs of wear from heat, chemical treatments, or mechanical stress—particularly people seeking a professional-strength primer to reduce breakage and improve shine. If you regularly blow-dry, flat-iron, or color your hair and want a product that adds heat defense plus strengthening benefits, this serum is formulated to fit into a salon-grade care routine and everyday styling.

Ingredients

Water, Cyclopentasiloxane, Propylene Glycol, Dimethiconol, Triethanolamine, Phenoxyethanol, Peg/Ppg-17/18 Dimethicone, Carbomer, Behentrimonium Chloride, Polyquaternium-4, Potato Starch Modified, Hydroxypropyl Guar, Methylparaben, Limonene, Amodimethicone, Cetyl Alcohol, Quaternium-87, Behentrimonium Methosulfate, Quaternium-33, Trideceth-6, 2-Oleamido-1,3-Octadecanediol, Geraniol, Linalool, Glycerin, Citronellol, Citral, Cetrimonium Chloride, Trehalose, Tamarindus Indica Seed Polysaccharide, Myrothamnus Flabellifolia Leaf Extract, Fragrance.