KÉRASTASE Resistance Bain Thérapiste Repair Shampoo 8.5 fl oz — Rebuilds & Strengthens Damaged Hair

KÉRASTASE Resistance Bain Thérapiste is a concentrated repair shampoo that strengthens, hydrates, and helps restore extremely damaged, brittle hair.

This salon-grade cleansing treatment is formulated for hair weakened by heat styling, chemical processes, and mechanical stress. Powered by Fibra-Kap technology and targeted rebuilding ingredients, the formula gently removes buildup while working to rejoin and seal damaged fiber for improved elasticity and reduced breakage. Use it as the first step in the Resistance Thérapiste regimen to revive texture, manageability, and shine.

How does this shampoo repair split ends and stressed hair?

The formula focuses on reconstructing compromised hair fiber rather than just masking damage. Fibra-Kap technology helps bind weakened strands and fills gaps in the cortex, supporting hair resilience and smoother lengths.

• Targets split and frayed ends with rebuilding agents
• Seals damaged cuticles to reduce friction and tangling
• Restores surface smoothness for a satin finish

How should I use Bain Thérapiste for best results?

Apply to thoroughly wet hair, lathering from roots to ends to distribute actives evenly. Rinse and repeat, focusing the second application on mid-lengths and ends and leave on for up to two minutes before rinsing to allow rebuilding ingredients to work.

• Use a coin-sized amount for medium hair; adjust for length/thickness
• Repeat shampoo and leave the second lather for 2 minutes
• Follow with Thérapiste mask and serum from the Resistance collection

What improvements can I expect and when?

After the first uses hair appears softer, less frizzy, and easier to detangle. Continued use within the full Resistance Thérapiste routine improves elasticity and reduces the look of breakage, delivering visibly healthier lengths over time.

• Immediate: cleaner-feeling hair with reduced surface roughness
• Short term: smoother detangling and decreased friction
• Ongoing: strengthened fiber and fewer split-end appearances

Can I use it with color-treated or chemically processed hair?

Bain Thérapiste is designed for overstressed hair, including strands altered by color or chemical services. The gentle cleansing action helps preserve color while reinforcing fragile areas, but always perform a patch or strand test if concerned.

• Safe for post-service hair when used as directed
• Helps protect fibers from further mechanical and heat damage
• Works best when paired with complementary Thérapiste treatments

Who is this for: KÉRASTASE Resistance Bain Thérapiste is aimed at anyone with very damaged, brittle, or overprocessed hair seeking an intensive repair shampoo. It benefits those who regularly use heat tools, undergo chemical services, or notice loss of elasticity and frequent breakage. For optimal reconstruction, use it as part of the Resistance Thérapiste system—shampoo, mask, and serum—to rebuild fiber strength, improve manageability, and restore a smoother, healthier-looking finish.

Ingredients

Water, Sodium Laureth Sulfate, Coco-Betaine, Glycerin, Glycol Distearate, Amodimethicone, Sodium Chloride, Imethicone, Ppg-5-Ceteth-20, Sodium Benzoate, Polyquaternium-6, Peg-150 Distearate, Salicylic Acid, Linalool, 2-Oleamido-1,3-Octadecanediol, Carbomer, Trideceth-6, Citronellol, Glycine, Arginine, Proline, Tyrosine, Glutamic Acid, Geraniol, Serine, Hydroxypropyltrimonium, Hydrolyzed Wheat Protein, Cetrimonium Chloride, Benzyl Alcohol, Safflower Glucoside, Isoeugenol, Trehalose, Tamarindus Indica Seed Polysaccharide, Myrothamnus Flabellifolia Leaf Extract, Citric Acid, Sodium Hydroxide, Fragrance.