Kérastase Résistance Sérum Thérapiste is a leave-in repair serum for very damaged, over-processed hair. Its dual repairing-cream-and-binding-serum formula rebuilds fibres and seals the cuticle — leaving brittle, heat- and colour-stressed hair stronger, smoother and softer, with no rinsing.

Benefits
  • Rebuilds and seals — repairs fibres and smooths the cuticle end to end.
  • Reinforced strength — strengthens internal bonds to reduce breakage.
  • Frizz-free finish — seals for silkier, easier detangling.
  • Lightweight leave-in — absorbs fast without weighing hair down.
How to use
  1. On towel-dried hair, apply a small amount from mid-lengths to ends, focusing on the driest sections.
  2. Comb through to distribute, and do not rinse.
  3. Style as usual, and use daily or as needed.
Who it's for

Best for very damaged, over-processed hair — bleached or heat-styled — that needs daily reinforcement. Explore more damaged-hair picks or the full Kérastase range.

Specifications

Brand
Kérastase
Size
30ml
Format
Serum
Hair concerns
Damaged, Breakage, Weak Hair, Chemically Treated, Heat-Damaged
Suitable for
Damaged,All hair types
Finish
Shiny

Authorised Kérastase stockist

Know exactly what you are buying

Professional guidance, honest answers and the details that matter.

Why our stylists rate it
From the Partners Hair team
Kérastase Resistance Sérum Thérapiste is a two-phase leave-in hair serum for severely damaged hair. Part of the Kérastase Resistance range. Combines a watery and an oily phase that activate together to repair the hair fibre and protect against heat styling up to 230°C / 450°F.

Best for: severely damaged or chemically over-processed hair that requires intensive leave-in repair beyond what a conditioner can deliver; hair regularly subjected to heat styling that needs both protection and reconstruction; the leave-in step in a Thérapiste reconstruction routine paired with Bain Thérapiste and Masque Thérapiste.
Less suited to: mild-to-moderate damage (use Resistance Ciment Anti-Usure as the daily anti-breakage cream, or Ciment Thermique for blow-dry protection); hair primarily concerned with length retention (use Resistance Sérum Extentioniste — designed for the scalp and lengths to support growth); colour-treated blonde hair (use Blond Absolu Cicaplasme); curly hair seeking definition (use Curl Manifesto leave-in range).

Key actives:
- Fibra-Kap™ Complex amino acid blend — Glycine, Arginine, Proline, Tyrosine, Glutamic Acid, Serine; restores the building blocks of damaged keratin
- Hydrolysed Wheat Protein — coats and reinforces the hair fibre
- Sève de Résurrection (Myrothamnus flabellifolia) — resurrection plant extract that restores resilience
- Heat-protective silicone film (Cyclopentasiloxane, Dimethiconol, Phenyl Trimethicone) — shields the hair from heat damage up to 230°C / 450°F
- Two-phase formula — shake before use to combine watery (repair) and oily (protection) phases

Benefits:
- Repairs very damaged hair fibre and restores elasticity
- Heat protection up to 230°C / 450°F against blow-drying and styling tools
- Deeply hydrates without weighing fragile lengths down
- Strengthens existing hair and supports manageability
- Two-phase technology delivers both repair and protection in a single step

How to use: Shake the bottle before use to combine the two phases. Apply 1–2 pumps to towel-dried hair, focusing on mid-lengths and ends. Distribute evenly. Do not rinse. Blow-dry or heat-style as usual.

Format: 30ml (2 x 15ml two-phase bottle).

Authorised Kérastase stockist — 100% authentic, sourced from the official South African distributor. Free delivery on orders over R390 across South Africa.
Delivery without the guesswork

Spend R390 and delivery is on us. Orders under R390 are delivered for R67. We normally pack within 1 working day, with delivery in 2–5 working days depending on your location.

Changed your mind? You have 7 days after receiving your order to request a return. Email hello@partnershair.co.za to get started.

Why shop it at Partners Hair

Professional haircare is only as good as the source. We buy through official South African distribution, so every item is genuine, authorised stock.

Behind the store are 250+ working stylists across 24 Cape Town salons. Need help choosing? Visit Ask the Experts for real advice from the salon floor.

Why professionals trust Partners

Salon authority since 1984

Four decades of hands-on hair expertise behind every recommendation.

Advice from 250+ working stylists

The products online are the products our teams reach for in 24 salons every day.

Only authentic professional stock

Authorised products sourced through official South African distribution.