💪 Resistance Kérastase in Milan: the reconstructive line for damaged, fragile hair with breakage

Some hair you only realise has changed when you start seeing it on the floor.
On the brush, on the towel, on the floor after blow-drying. It hasn’t fallen out, it has broken.

It’s a situation we see often at Alexim Atelier Duomo. Hair that until a while ago held its blowdry, its highlights, its daily flat iron, and that at some point starts to give in. Ends that split, lengths that turn rough to the touch, strands that break short when you run your fingers through them. The client arrives worried, often convinced she is losing her hair, and in most cases the issue is something else: the hair is not falling out, it is breaking because the internal structure is weakened.

For this hair there is a specific line, and it is called Résistance. It is the iconic Kérastase range dedicated to the reconstruction of damaged hair, built on the Vita-Ciment technology and on the resurrection plant sap. The line is articulated in three sub-families, calibrated on different erosion levels of the fibre: Force Architecte for weakened hair (level 1-2), Thérapiste for very damaged hair (level 3-4) and Extentioniste for those with long hair prone to breakage on lengths and ends.

At Alexim Atelier Duomo, in Via Mazzini 16 in Milan, the Resistance treatment is one of the most requested reconstructive services among clients who undergo heavy lightening, balayage, Airtouch, or who live with hair stressed by years of flat iron and colour. In this article we explain how the line works, how to identify the three erosion levels, what the active ingredients that make the difference are, how the ritual unfolds in salon and how to continue the care of the fibre at home with the complete routine. 💪

🔍 Hair that breaks: what actually happens to the fibre

A healthy hair is a very precise structure. Inside, the cortex holds the keratin together through chemical bonds and proteins that work as connectors between one fibre and the next. Outside, the cuticle is a compact surface that protects the cortex from mechanical and environmental stress. As long as both structures are intact, the hair is elastic, resistant, capable of withstanding tension and heat without breaking.

When hair breaks, the problem is almost always internal. The chemical stress of repeated lightening sessions, the thermal stress of daily flat iron use without adequate protection, the mechanical stress of brushing on wet hair, the combined effects of colour, bleach and aggressive styling: all of this progressively erodes the internal bonds and weakens the keratin. The fibre loses elasticity, becomes rigid, and at some point gives way under stress that previously it would have withstood without issue.

The most recognisable clinical sign is breakage on lengths and ends. The client notices short hairs popping up at the top of the head, split ends multiplying despite regular trims, lengths that become thin and that in the light show lighter strands (the medulla of the hair becoming visible through a now-worn-down cortex). Often this is paired with loss of shine, a straw-like feel and difficult detangling even after conditioner and mask.

At this level a simple hydration is not enough. What is needed is a reconstructive treatment, capable of entering the cortex and reconnecting the micro-proteins that hold the fibre together. This is exactly the territory Resistance has been working on for decades. 💪

🏛️ Resistance Kérastase: what it is and why it is the reference reconstructive line

Résistance is the Kérastase line dedicated to the reconstruction of damaged, weakened hair with breakage. It is one of the longest-running ranges of the brand and over time has become a reference for anyone, in salon, who has to work on hair stressed by aggressive technical services, by daily thermal styling or by a combination of the two. Its distinctiveness lies in a precise idea: nourishing from the outside is not enough, the hair must be reconstructed from the inside.

At the heart of the line is the Vita-Ciment technology, a complex that acts on two fronts simultaneously: pro-keratin, which reconstructs the internal matter of the hair where its natural connectors have been lost, and ceramides, which reinforce the fibre from the outside by sealing the eroded areas. Alongside Vita-Ciment works the resurrection plant sap (Myrothamnus flabellifolius), a plant capable of surviving extreme conditions of dryness and of coming back to life within 24 hours of rainfall even after 10 years of dormancy, from which Kérastase extracts regenerating actives that restore vitality to the fibre.

What distinguishes Resistance from the other Kérastase lines is its erosion-level logic. The line is not a single generic range, but a diagnostic system articulated into three sub-families, each calibrated on a precise degree of damage:

• 💪 Force Architecte, for weakened hair with split ends and a tendency to breakage, erosion level 1-2. It is the most requested sub-family, designed for those whose hair has started to give in but is not yet severely compromised;
• 💪 Thérapiste, for very damaged and over-processed hair, erosion level 3-4. It is the highest level of the line, indicated for hair stressed by repeated bleaching, by nanoplastia on already-compromised hair, by years of daily thermal styling;
• 💪 Extentioniste, for long hair with a tendency to breakage on lengths and ends, in search of healthy growth. It works from roots to tips to reinforce the fibre and seal the fragile areas that prevent the hair from growing long.

Clients who ask us about Resistance in Milan are generally women with a significant technical history behind them (multiple lightening sessions, balayage redone several times, a transition from dark brown to blonde) and who are looking for a line capable of restoring strength to the fibre before the damage becomes irreversible. It is also a line we propose as preparation to clients about to undertake heavy lightening journeys, because preparing the fibre before the service makes a real difference on both the result and its long-term hold. 💪

🧬 Vita-Ciment, ceramides and resurrection plant: the actives that reconstruct the fibre

The core of the Resistance formula is the Vita-Ciment complex, a union of pro-keratin and ceramides that works on two different levels of the hair. Pro-keratin is a precursor version of the hair’s natural keratin, capable of penetrating into the cortex and reconnecting the areas where the internal matter has been eroded. It functions like a cement that rebuilds the lost chemical bonds and that restores to the fibre its original compactness. This is what clients perceive as a feeling of hair that is “fuller” and less hollow at the base of the lengths.

Alongside pro-keratin work the ceramides, lipids that we know in facial skincare as fundamental components of the skin barrier. On hair, ceramides have an analogous function: they reinforce the cuticle from the outside, seal the areas where the scales have lifted, and create a protection against future aggressions. A well-sealed cuticle defends itself better from flat iron heat, from environmental humidity and from the mechanical stress of brushing.

Completing the formula is the resurrection plant sap (Myrothamnus flabellifolius), one of the most fascinating actives in the cosmetic world. This plant grows in extreme environments and has developed the ability to survive long periods of complete dehydration, then to come back to life within 24 hours when it meets water. Kérastase extracts from this plant regenerating actives that are integrated into the Force Architecte and Thérapiste formulas and that bring a botanical component of vitality to the treated fibre.

In the Thérapiste sub-family, dedicated to very damaged hair, the formula is enriched with the Fibra-KAP technology, designed to compensate for the loss of KAPS, micro-proteins that connect the hair fibres and that progressively diminish when the hair is severely compromised. It is a deeper level of intervention, designed for hair where the cortex has lost a significant portion of its original protein structure and where a simple hydrating treatment would not be sufficient. 💪

✂️ Resistance treatment in Milan: how it unfolds in salon

The Resistance treatment in salon is the reconstructive ritual we propose at Alexim Atelier Duomo to clients who present significant signs of damage to the fibre, and it lasts on average about 35-45 minutes depending on the chosen sub-family and on the level of erosion. It is a treatment designed to repair in depth, not just to restore a temporary cosmetic effect, and it works best when integrated into a consistent course of several sessions.

Everything starts with the erosion-level diagnosis, which is the most important step of the entire Resistance protocol. Together with the client we assess the condition of the fibre: presence of breakage, split ends, roughness to the touch, recent technical history (lightening, bleach, nanoplastia), daily use of flat iron and blow-dryer, possible aggravating factors such as hard water and chlorine. Based on the diagnosis we assign the erosion level (from 1-2 to 3-4) and choose the correct sub-family: Force Architecte for the milder levels, Thérapiste for the severe ones, Extentioniste when the focus is on growing lengths.

The ritual itself unfolds across several phases:

• 💪 for cases of erosion 3-4, preventive application of the Soin Premier Thérapiste, the pre-shampoo treatment applied on wet hair for 1-2 minutes that envelops the fibre before cleansing, protecting it from the mechanical action of the wash;
• 💪 double cleansing with the shampoo of the chosen sub-family (Bain Force Architecte, Bain Thérapiste or Bain Extentioniste), which cleanses the scalp from residues and prepares the fibre for the reconstructive actives that follow;
• 💪 scalp massage according to the Kérastase protocol, with precise gestures that stimulate microcirculation and optimise the penetration of the actives;
• 💪 application of the reconstructive mask (Masque Force Architecte, Masque Thérapiste or Masque Extentioniste) on lengths and ends, with development times of 5-10 minutes calibrated on the erosion level. The mask is clinically the most important moment of the treatment: this is where the Vita-Ciment complex penetrates the cortex and rebuilds the internal matter;
• 💪 thorough rinsing and application of Ciment Thermique, the reconstructive heat-protective milk that coats the fibre with a light texture, seals the cuticle and protects the hair from blow-dryer and flat iron heat up to 230°C;
• 💪 modelling blow-dry and, on clients with significant split ends, finish with a few drops of Sérum Thérapiste, the double-texture serum that specifically targets very damaged ends.

The most recognisable moment of the ritual is the mask development time. Clients often think very little time is enough, but in the Resistance protocol the development time is a clinical component: 5 minutes are the minimum to activate the pro-keratin, and on erosion levels 3-4 we go up to 10 minutes because the fibre needs time to absorb and rebuild. It is precisely the combination of pre-treatment, shampoo, mask and Ciment Thermique that produces the reconstruction results documented by the brand.

The effect is immediately perceptible to the touch. The client leaves the salon with hair that has regained compactness, slip and a density along the lengths that previously had been eroded by breakage. The real difference, however, becomes visible in the following weeks, if the treatment is supported by the correct home routine: the hair begins to break less, split ends slow their formation and the fibre progressively regains its natural resistance. 💪

🎯 Who we recommend the Resistance treatment to

At Alexim Atelier Duomo we propose Resistance to clients who present concrete signs of damage to the fibre, not as a generic routine treatment. It is a reconstructive line and it works when there is a real problem to address. It is particularly indicated for:

• 💪 hair with visible breakage on lengths and ends, short hairs sticking up at the crown, recurring split ends;
• 💪 bleached, lightened or repeatedly balayage-treated hair, especially in cases of transition from dark brown to blonde or Airtouch on already-lifted bases;
• 💪 hair stressed by daily flat iron use and aggressive thermal styling, even in the absence of recent technical services;
• 💪 hair that has had nanoplastia, Brazilian blowout or chemical smoothing treatments and shows signs of subsequent weakening;
• 💪 long hair that struggles to grow because it breaks at the ends (typical case for Extentioniste);
• 💪 hair sensitised by a combination of chemical, thermal and environmental factors.

Resistance works very well as technical preparation ahead of a heavy lightening service: reinforcing the fibre one or two weeks before a bleach or a balayage on a dark base makes a concrete difference on the result and reduces the stress of the service. It also integrates very well after the technical service, as a closing step or in the following weeks, as maintenance reconstruction. For those who are instead looking for mirror shine and an anti-frizz effect the reference line is Gloss Absolu, while for deep nutrition on dry hair it is Nutritive. The three lines often combine: Resistance as the foundational reconstruction, Nutritive as the accompanying hydration, Gloss Absolu as the mirror-shine finish. 💪

🏠 Resistance at home: the complete routine to maintain and amplify the result

The salon treatment is the starting point of the reconstruction, but with Resistance more than with other lines it is the daily routine that makes the difference over the long term. A damaged fibre needs a constant intake of reconstructive actives to consolidate the result and to avoid the starting conditions returning at the first styling. At Alexim Atelier Duomo we accompany every client in choosing the most suitable routine for her erosion level.

The Force Architecte routine is the most requested one, designed for erosion level 1-2. It includes Bain Force Architecte, the reconstructive shampoo to be used two or three times a week, and Masque Force Architecte, the anti-breakage mask to be applied on the lengths once or twice a week with a development time of at least 5 minutes. As an alternative to the mask, on finer hair, you can use the Ciment Anti-Usure, the dual reconstructive treatment with Topseal protection that works as an intensive conditioner for more frequent use.

The Thérapiste routine is designed for erosion level 3-4 and is the most complete of the line. It includes Soin Premier Thérapiste as a pre-shampoo treatment (1-2 minutes development time on wet hair before cleansing), Bain Thérapiste as shampoo, Masque Thérapiste as a deep reconstructive mask with at least 5-10 minutes of development time, and Sérum Thérapiste as a targeted treatment for split ends, to be applied on dry or towel-dried hair with one or two drops on the ends. It is an articulated routine, but it is the sequence that produces the best results on heavily compromised hair.

The Extentioniste routine is dedicated to those with long hair who want to grow it out while reducing breakage on lengths and ends. It includes Bain Extentioniste, the shampoo that works from roots to tips reinforcing the fibre, and Fondant Extentioniste, a detangling repairing cream indicated for fine to medium hair. For thicker hair the routine is completed with Masque Extentioniste, the specific reconstructive mask for denser hair. Extentioniste also works well in combination with technical services such as colour or balayage on long hair.

The Ciment Thermique is the product we recommend across all three sub-families. It is the pre-blowdry heat-protective milk that protects the fibre from blow-dryer and flat iron heat up to 230°C, seals the cuticle and amplifies the reconstructive work of the mask. On damaged hair it is a non-negotiable step: going to the flat iron without thermal protection undoes much of the work done in salon.

The advice we always give to our clients is not to underestimate consistency. A Resistance mask used once gives a benefit, but it is the weekly repetition that produces the clinical results visible on the fibre after one or two months. On very damaged hair we map out a course of several reconstruction sessions in salon and a precise home routine, and the difference shows. 💪

🕰️ Resistance according to Alexim Atelier Duomo

We have been working with Resistance for years and have developed a deep knowledge of the three levels. We know how to recognise when a client needs Force Architecte and when instead the damage is at 3-4 and requires Thérapiste. We also know how to calibrate the mask development time based on the porosity and on the technical history of the fibre, because on heavily treated hair the standard protocol parameters often need to be adapted.

Our technical specialisation, particularly on lightening techniques such as Airtouch and balayage and on colour services with the Color Couture method, naturally leads us to integrate Resistance into complex technical journeys. We prepare the fibre with Force Architecte one or two weeks before an important service, accompany the service itself with the Olaplex protocol in cabin, and close with Resistance as maintenance reconstruction in the following weeks. It is an integrated approach that reduces the stress on the hair and that amplifies the hold of the colour result.

Our approach is always consultative and honest. If your hair does not present a level of erosion that justifies Resistance we will tell you, and we will direct you to Nutritive or Gloss Absolu based on your real need. If instead the fibre is genuinely compromised we will design a serious reconstructive journey, with realistic timelines and expectations: damaged hair is not repaired in one session, but over several weeks of coordinated work between salon and home routine. Our reputation is built on results over time, not on the individual receipt. 💪

⭐ Reviews

Reviews tell what for us is essential: listening, precision, elegance and consistency over time. At Alexim Atelier Duomo every reconstructive treatment is designed to make the client feel followed, understood and accompanied on a real journey, from the first minute to the final result. 💪

📍 Where we are

❓ FAQ – Resistance Kérastase Milan

Who is the Resistance line for?
Resistance is the Kérastase line designed for damaged, weakened hair with breakage. It is particularly suited for those whose hair is stressed by repeated lightening, balayage, Airtouch, bleach, by daily thermal styling with flat iron, by chemical treatments such as nanoplastia, or for those who deal with recurring split ends and breakage along the lengths.

What are the three Resistance sub-families?
Resistance is articulated into three sub-families calibrated on the erosion level of the fibre. Force Architecte is dedicated to weakened hair with split ends (erosion level 1-2). Thérapiste is the most intensive version, for very damaged and over-processed hair (erosion level 3-4). Extentioniste works on the lengths and is designed for those who have long hair and want to grow it while reducing breakage on the ends.

How long does the Resistance treatment in salon last?
The Resistance treatment in salon lasts on average about 35-45 minutes, from cleansing to finish, depending on the chosen sub-family and on the erosion level. The time includes the initial erosion-level diagnosis, the eventual Soin Premier pre-treatment for the more severe cases, the double cleansing with the shampoo of the line, the scalp massage according to the Kérastase protocol, the mask development time, the application of Ciment Thermique and the modelling blow-dry.

What is the Vita-Ciment technology?
The Vita-Ciment technology is the heart of the Resistance line. It is a complex that works on two levels of the hair simultaneously: pro-keratin, which reconstructs the internal matter of the hair where the natural connectors have been lost, and ceramides, which reinforce the fibre from the outside by sealing the areas where the cuticle has lifted. Together they produce a complete reconstruction, from the inside outwards.

What is the resurrection plant?
The resurrection plant, scientific name Myrothamnus flabellifolius, is a plant capable of surviving extreme conditions of complete dehydration and of coming back to life within 24 hours when it meets water, even after long periods of dormancy. Kérastase extracts from it regenerating actives that are integrated into the Force Architecte and Thérapiste formulas and that bring a botanical component of vitality to the treated fibre.

How do I know if my erosion level is 1-2 or 3-4?
The diagnosis has to be done in salon because it requires a direct tactile and visual assessment of the fibre. As a general guideline, level 1-2 (Force Architecte) corresponds to weakened hair with split ends, opacity and a tendency to breakage but with a still reasonably intact structure. Level 3-4 (Thérapiste) corresponds to hair where breakage is recurring, the length has shortened because the ends break constantly, the fibre is rough to the touch and has a technical history of multiple lightening sessions, bleaching or aggressive chemical treatments.

Can I do Resistance before a bleach or an Airtouch?
Yes, and we recommend it. Preparing the fibre with a Force Architecte treatment one or two weeks before a heavy lightening service makes a concrete difference on the result. A stronger fibre handles the stress of the service better, and this translates into a more uniform lift, a better hold of the colour and less residual damage in the following weeks.

Does Resistance work after nanoplastia?
Resistance is a good choice also after chemical smoothing treatments such as nanoplastia, especially if the fibre shows signs of subsequent weakening. In these cases we assess together the erosion level and design a reconstructive journey, often with Thérapiste, calibrated on the recent technical history.

What is the difference between Resistance and Nutritive?
They are two Kérastase lines with different clinical objectives. Resistance is the line of reconstruction: it works on hair with breakage, fragility and split ends, rebuilding the internal matter with the Vita-Ciment complex. Nutritive is the line of nutrition and hydration: it works on dry and dehydrated hair with plant proteins and niacinamide. The two lines often combine: Resistance as the foundational reconstruction, Nutritive as the accompanying hydration on the in-between washes.

What is the difference between Resistance and Gloss Absolu?
Resistance and Gloss Absolu respond to completely different needs. Resistance works on the structure of the fibre: it reconstructs, reinforces, reduces breakage. It is a clinical reconstructive treatment. Gloss Absolu works on the surface: it seals the cuticle, restores mirror shine, fights frizz. It is an aesthetic-functional treatment. The two lines often combine in a coherent way: first you reconstruct the fibre with Resistance, then you valorise the visible result with Gloss Absolu.

Can I buy the Resistance products without doing the salon treatment?
Yes, the Resistance retail is open to all clients, including those who are not regular salon clients. We do however recommend a short diagnosis of the erosion level before purchase, because choosing the wrong sub-family (Force Architecte instead of Thérapiste, or vice versa) means investing in a routine that is not calibrated on your real need. A correct diagnosis makes the difference on the results.

How often should the Resistance treatment be repeated?
It depends on the erosion level and on the journey we map out. On hair with erosion 1-2 we generally propose a salon treatment every 4-6 weeks, accompanied by a consistent home routine. On hair with erosion 3-4 the initial journey is more intensive (several closely-spaced sessions to consolidate the reconstruction) and then we move on to monthly maintenance. The calendar is defined together during the consultation, based on your technical history and on your lifestyle.

How much does the Resistance treatment cost in Milan?
The cost of the Resistance treatment varies depending on the chosen sub-family (Force Architecte, Thérapiste, Extentioniste), on the length of the hair and on the possible pairing with other services (colour, lightening, blowdry, balayage). At Alexim Atelier Duomo we propose Resistance both as a standalone service and as a paired treatment in closing or in preparation of a technical service. Contact us on WhatsApp for a personalised quote.

Where is the Resistance Alexim salon in Milan?
We are in Via Giuseppe Mazzini 16, 200 metres from the Milan Duomo. The nearest metro stations are Duomo (M1 and M3) and Missori (M3). For those arriving by car, the area is ZTL Cerchia dei Bastioni: we recommend the parking facilities at Piazza Diaz or Autosilo Diaz. We are easily reachable also for the Quadrilatero della Moda clientele and for those arriving from Italian-speaking Switzerland and Canton Ticino.