KÉRASTASE Resistance Bain Extentioniste Length-Strengthening Shampoo, 16.9 fl oz — Reinforces Elasticity & Smooths Hair

KÉRASTASE Resistance Bain Extentioniste is a length-strengthening shampoo formulated to reinforce hair structure, boost elasticity, and prepare strands for restorative conditioning.

Designed for weakened or damaged lengths, this creamy cleanser combines Creatine R, Ceramides, and Taurine to fortify hair from root to tip while gently purifying the scalp. It helps smooth the surface of the fiber for improved shine and manageability and delivers a light, sophisticated fragrance. Use it as the first step in a rebuilding routine to make hair more resilient before applying richer treatments.

How does this shampoo strengthen hair without weighing it down?

Bain Extentioniste uses a lightweight rebuilding complex that targets internal and surface damage while maintaining natural movement. Creatine R penetrates the fiber to reinforce internal structure, while ceramides smooth and resurface the cuticle for softer, shinier lengths.

• Creatine R helps rebuild inner hair architecture.
• Ceramides restore surface softness and reduce frizz.
• Taurine supports a healthier scalp environment for stronger growth.
• Formula rinses cleanly so hair remains buoyant and soft.

Will this prepare hair well for deep conditioning treatments?

Yes — the shampoo clears buildup and reinforces the fiber so subsequent masks penetrate more effectively. By smoothing the cuticle and improving fiber elasticity, masks and oils can adhere better and deliver deeper repair.

• Prepares lengths to absorb concentrated treatments.
• Leaves cuticle surfaces smoother for better product uptake.
• Improves elasticity so conditioning results last longer.

Is KÉRASTASE Bain Extentioniste suitable for all hair types?

The formula is created to benefit all hair types that show weakened, damaged, or over-processed lengths. Whether hair is fine, thick, straight, or curly, the shampoo focuses on reinforcing the fiber and improving manageability without heavy residues.

• Safe for color-treated and chemically styled hair.
• Effective on both fine and dense textures.
• Gentle enough for frequent use in a rebuilding routine.

How should I use it for best results?

Apply to wet hair and massage gently into scalp and lengths, then rinse thoroughly; repeat if hair is very dirty. Follow with a KÉRASTASE mask or conditioner tailored to strengthening and length maintenance for optimal rebuilding effects.

• Use as the first step in a resistance routine.
• Pair with a deep conditioning mask after shampooing.
• For maintenance, use regularly to preserve elasticity and shine.

Who is this for: KÉRASTASE Resistance Bain Extentioniste is ideal for anyone with weakened, stretched, or breakage-prone lengths who wants to strengthen hair from within while maintaining natural movement and shine. It’s especially useful for those growing hair longer, recovering from chemical or heat damage, or seeking a preparatory cleanser before intensive conditioning. For best outcomes, incorporate into a targeted KÉRASTASE regimen with complementary treatments and styling products.

Ingredients

Aqua / Water \\u25cf Sodium Laureth Sulfate \\u25cf Coco-Betaine \\u25cf Taurine \\u25cf Cocamide Mipa \\u25cf Sodium Chloride \\u25cf Amodimethicone \\u25cf Laureth-5 Carboxylic Acid \\u25cf Ppg-5-Ceteth-20 \\u25cf Sodium Benzoate \\u25cf Sodium Hydroxide \\u25cf Citric Acid \\u25cf Polyquaternium-10 \\u25cf Peg-55 Propylene Glycol Oleate \\u25cf Propylene Glycol \\u25cf Peg-60 Hydrogenated Castor Oil \\u25cf Salicylic Acid \\u25cf Amyl Cinnamal \\u25cf Hexyl Cinnamal \\u25cf Benzyl Alcohol \\u25cf Linalool \\u25cf Hydroxycitronellal \\u25cf Citronellol \\u25cf Limonene \\u25cf Creatine \\u25cf 2-Oleamido-1,3-Octadecanediol \\u25cf Benzyl Cinnamate \\u25cf Sodium Acetate \\u25cf Isopropyl Alcohol \\u25cf Parfum / Fragrance.