KÉRASTASE Fondant Extentioniste Strengthening Conditioner 200ml — Amino Acid & Ceramide Repair for Damaged Lengths

KÉRASTASE Fondant Extentioniste is a creamy, amino-acid–enriched conditioner that detangles, reinforces weakened hair lengths and helps seal split ends for visibly stronger, longer-looking hair.

This conditioner is formulated for hair that has been stretched thin by styling, colouring or mechanical damage. Using creatine R and ceramides, the formula targets the mid-lengths and ends to restore manageability, enhance shine and help prevent further breakage. It works best as part of the Extentioniste routine to build resistance and promote healthier-looking lengths over time.

How will this conditioner improve my daily detangling routine?

Fondant Extentioniste smooths and softens fragile strands so a comb or brush glides through with less pulling. Within minutes it reduces knots and surface roughness, making wet-to-dry styling gentler on compromised hair.

• Reduces tangles and friction for easier comb-through
• Leaves a slip-enhancing layer to minimize breakage during styling
• Quick 2–3 minute application time for efficient use

What ingredients make it effective on damaged lengths?

The formula combines creatine R, a peptide-like ingredient that helps reinforce hair fiber, with ceramides that restore lipids in the cuticle. Amino acids deliver targeted nourishment to weakened zones so strands feel firmer and display improved surface integrity.

• Creatine R: supports fiber resistance along mid-lengths and ends
• Ceramides: seal cuticles for increased shine and moisture retention
• Amino acids: rebuild and smooth fragile hair structure

Will this product actually help with split ends and length retention?

While conditioners cannot repair split ends permanently, Fondant Extentioniste helps seal and smooth split areas temporarily to reduce visible fraying and breakage during styling. By strengthening the lengths and improving manageability, it supports healthier hair growth habits and better length retention over time.

• Seals cuticle layers to minimize immediate split appearance
• Strengthens weakened strands to reduce breakage events
• Recommended with the full Extentioniste range for best results

How should I use it for best results?

Apply after cleansing with Extentioniste Shampoo: work a quarter-sized amount into wet mid-lengths and ends, leave for 2–3 minutes, then rinse thoroughly. For deeper repair, follow the routine with the Therapist Hair Mask periodically and avoid applying conditioner at the roots to prevent weighing down fine hair.

• Use after Extentioniste Shampoo for a complete system
• Focus application from mid-length to ends, avoid scalp roots
• Leave 2–3 minutes, rinse; use mask weekly for intensive care

Who is this for: KÉRASTASE Fondant Extentioniste is designed for people with long, fragile or over-processed hair who want to reduce breakage and improve manageability. It’s ideal if your lengths feel brittle, knot easily, or you’re trying to retain length without sacrificing smoothness and shine. When used as part of the Extentioniste regimen, it supports stronger-looking mid-lengths and ends and is suitable for all hair textures seeking reinforcement rather than heavy conditioning.

Ingredients

Aqua, Water, Cetearyl Alcohol, Propylene Glycol, Maleic Acid, Behentrimonium Methosulfate, Ethanolamine, Stearamidopropyl Dimethylamine, Glycerin, Phenoxyethanol, Hydroxyethylcellulose, Quaternium-91, Polyquaternium-37, Benzoic Acid, Paraffinum Liquidum, Mineral Oil, Cetrimonium Chloride, Cetrimonium Methosulfate, Amyl Cinnamal, Hexyl Cinnamal, Benzyl Alcohol, Ppg-1 Trideceth-6, Linalool, Hydroxycitronellal, Acrylates Copolymer, Citronellol, Limonene, Creatine, 2-Oleamido-1, 3-Octadecanediol, Benzyl Cinnamate, Sorbitan Oleate, Ci 19140, Yellow 5, Ci 42090, Blue 1, Parfum, Fragrance.