KERASTASE Résistance Sérum Thérapiste Repair Serum 30ml

KERASTASE Résistance Sérum Thérapiste Repair Serum 30ml is a professional dual-action repairing serum for very damaged, over-processed and chemically sensitised hair. Designed for hair experiencing an advanced level of damage, it combines a repairing cream with a binding serum to reinforce and resurface weakened fibres while leaving lengths smoother, softer and more manageable.

The formula also provides heat protection up to 230°C, helps seal damaged ends to protect against split ends and can make blow-drying up to twice as fast. Kérastase positions Thérapiste specifically for very damaged and over-processed hair, including damage caused by chemical or mechanical aggressors.

Repair → Reinforce → Resurface → Seal Ends → Heat Protect → Smooth

Key Benefits

• Repairs very damaged and over-processed hair
• Reinforces weakened hair fibres
• Helps resurface damaged lengths
• Heat protection up to 230°C
• Helps seal vulnerable ends
• Protects against split ends
• Helps smooth rough, damaged hair
• Improves softness and manageability
• Creates a smoother, shinier finish
• Can make blow-drying up to twice as fast
• Dual repairing cream and serum technology
• Suitable for wet and dry hair
• Leave-in formula
• 30ml

What Is It?

Sérum Thérapiste is the intensive repairing leave-in serum within the KERASTASE Résistance Thérapiste collection.

This is not primarily a shine serum or hair oil. Its core purpose is damage repair and protection.

Kérastase separates its Résistance damage care broadly into:

Force Architecte → Damaged hair / erosion levels 1–2

Thérapiste → Very damaged and over-processed hair / erosion levels 3–4

That makes Sérum Thérapiste particularly relevant for hair compromised by repeated bleaching, colouring, chemical processing, straightening or heat styling.

Dual-Action Formula

Unlike a conventional single-texture hair serum, Sérum Thérapiste combines a:

Repairing Cream + Binding Serum

Kérastase designed the two components to work together to instantly reinforce and smooth the surface of very damaged hair while providing thermal protection — an intensive repair serum that also protects during styling.

Why You'll Love It

Sérum Thérapiste is ideal when regular smoothing products aren't enough. It specifically targets hair that feels brittle, rough, weakened or heavily sensitised after repeated processing.

It helps transform the feel and appearance of compromised lengths while adding the practical benefit of high-temperature protection.

The lightweight leave-in format also means the product can be incorporated into a regular styling routine without adding another rinse-out step.

Who Is It For?

Ideal for:

Very damaged hair
Over-processed hair
Bleached hair
Chemically treated hair
Frequently coloured hair
Heat-damaged hair
Brittle hair
Breakage-prone hair
Split ends
Rough damaged lengths
Thick or unruly damaged hair
Hair requiring intensive repair

For mild-to-moderate damage, another Résistance treatment may be sufficient — Sérum Thérapiste makes the most sense when the damage level is more advanced.

Pair Me With

KERASTASE Résistance Bain Thérapiste Shampoo – Repairing cleanser for very damaged and over-processed hair.

KERASTASE Résistance Masque Thérapiste – Intensive rebuilding mask designed for very damaged and over-processed hair.

Complete Thérapiste Routine

Bain Thérapiste → Masque Thérapiste → Sérum Thérapiste

Sérum Thérapiste becomes the final leave-in step, providing repair, smoothing, end protection and thermal protection.

Resistance Sérum Thérapiste Heat Protecting Serum | Kérastase UK

Step 1
Apply to washed and towel-dried hair

Step 2
Massage onto lengths and ends.

Step 3
Proceed to blowdry. .

Step 4
Leave-in.

Cyclopentasiloxane, Aqua, Water, Dimethiconol, Dimethicone, Ceteary, Alcohol, Phenyl Trimethicone, Amodimethicone, Phenoxyethanol, Polyquaternium-37, Trideceth-5, Propylene Glycol Dicaprylate, Dicaprate, Steareth-20, Cetyl Hydroxyethylcellulose, Linalool, Glycerin, 2-Oleamido-1, 3-Octadecanediol, Citronellol, Trideceth-10, Ppg-1 Trideceth-6, Geraniol, Glycine, Arginine, Proline, Tyrosine, Glutamic Acid, Chlorhexidine Digluconate, Serine, Benzyl Alcohol, Hydroxypropyltrimonium Hydrolyzed Wheat Protein, Isoeugenol, Safflower Glucoside, Alpha-Isomethyl, Ionone, Trehalose, Tamarindus Indica Seed, Polysaccharide, Myrothamnus Flabellifolia Leaf, Extract, Parfum Fragrance.