Zoltan Hair · Mayfair · An UP treatment · digital permUP
Wavement HotUP
The modern one, and the one most people actually want. Curl that only appears as the hair dries — so a rough dry gives you soft movement, body and shine with no tongs and no round brush.
See prices & bookAll UP treatmentsheat-set, section by section
soft when wet
softens gradually
Before anything else
Everything you do to your hair costs it something. Including nothing.
This is the part most salons leave out, so I would rather you had it first.
Think about a bag you actually like
Not the one in the box — the one you have carried every day for three years. Rained on. Put down on the floor of the tube. Stuffed too full. Keys rattling around in it. It does not look like it did in the shop and it never will again. That is not neglect. That is what carrying it every day does.
Your hair has been with you far longer
The lengths on hair past your shoulders are often four, five, six years old — grown, then worn, every single day since. Rain. Sun. Hard London water. A hairband. A brush pulled through it when you are late. A towel. A pillow. A blow-dry. An iron at 200 degrees because it would not sit down otherwise. None of it dramatic, all of it adding up — and unlike skin, hair does not repair itself. What happens to it stays happened.
And you never notice you are doing it
Nobody stands at the mirror thinking that is damage. You put it up because it is windy. You go over it again because one bit will not sit down. You rub it dry because you are late. It is automatic, it is every day, and it is a couple of thousand small decisions a year that nobody counts. A treatment is the one thing on that list you actually decide to do — which is why it feels like the risky one, and why it gets all the blame.
So the honest question is not “will this damage my hair?”
Everything does. The question is what you spend, and what you get back for it.
Yes, it has a cost — and this one is a real one
This treatment breaks bonds and reforms them. That is not a coating and it is not reversible. It is the whole reason the result is permanent, and it is the reason this is the treatment I turn down most often.
What you get back
Hair that looks better, feels smoother and above all behaves — every day, without being fought. The shine is real and so is the manageability. What I will not claim is that it leaves your hair healthier than it found it. This one genuinely spends.
And the daily spend drops
Hair that lies down does not get gone over five times with an iron. Hair that is not fighting you does not get brushed hard when you are rushing. For a lot of people the damage they stop doing is larger than the damage I do — but on this treatment that is a calculation, not a slogan.
Which is why it needs hair that has it to spend
Some hair has already spent more than it had, and for that hair the answer is no, or not yet. Bleach history first, before anything else. You will get told honestly which one you are — and being told no here is me doing my job, not losing your business.
What I promise
The three numbers, honestly
The important number here is not a percentage. It is when the curl shows up.
Salon time
3 – 4 hours
Longer than a cold perm, because each rod is heated and controlled individually. It is the more technical of the two by a distance.
What you get
Curl that appears as it dries
The defining difference. Soft when wet, springing as it dries — the exact opposite of a cold perm. Which is why it reads as naturally thick, healthy hair rather than as a perm.
How long it lasts
6+ months
It softens rather than dropping out, and the roots grow in straight so it fades into a soft movement. You are choosing Hot for how it looks and how little work it is.
What it actually does
Same bonds as a cold permUP. Heat is what changes the result.
Heat sets the shape, not just the chemistry
The bonds are opened chemically as in any perm, but the hair is wound onto heated rods and the shape is set at temperature. That heat-set memory is what makes the curl behave differently — it activates as the hair dries rather than being at its strongest wet.
Which is why it looks natural
Hair that is curliest dry looks like hair that grew that way. A rough dry with fingers gives soft movement and gloss; the curl builds as the water leaves. There is no styling technique to learn.
It reads as thicker hair
Curl that springs as it dries lifts at the root and separates through the length, which is why this is the treatment people book when the complaint is flat, lifeless or thinning-looking hair.
Why a treatment, rather than just looking after it better?
A fair question, and the honest answer is not the one that flatters me.
In an ideal world you would not need me
You would come in every few weeks for a conditioning treatment, and in between you would tie it up, air-dry it and leave it alone. That works. It genuinely does.
But almost nobody in London lives that way
Most of the people who sit in my chair are one of two. Either they can afford the upkeep and have not got the two hours a month — the standing appointment is the first thing cancelled, every time, because something at work moved. Or the time is not the problem and the money is, and a couple of hundred pounds a month on something that lasts three weeks is simply not a sensible way to spend it.
Either way you end up in the same place
Hair that never gets properly looked after, and gets fought with instead. Rushed. Ironed. Pulled up. Every day.
That is the actual case for this
One appointment, and the hair looks after itself for months. Not because it is magic and not because it is free — it costs your hair something and I have been straight with you about that. But it turns the upkeep from something you have to keep finding time and money for into something you did once. For most people that is the only version that survives contact with a real life.
And if you are someone who can do the standing appointment and the careful routine — tell me. That is a legitimate answer and I will say so.
In the chair
What actually happens on the day
1 · Read and design
Pattern, damage, colour history — then rod size, placement and how much curl you actually want. On a hot perm the design matters even more, because the result is what you see dry every day.
2 · Reduction
The reducing agent opens the bonds. Checked repeatedly rather than timed, then rinsed thoroughly.
3 · Wind onto heated rods
Each section wound and brought to temperature under control. This is the technical heart of the treatment and the reason it takes longer than a cold perm.
4 · Heat-set
The shape is set at temperature. Too little and the curl is soft and short-lived; too much on hair that cannot take it and you have damage. Judgement, not a dial.
5 · Neutralise
This treatment does need neutralising. An oxidiser reforms the bonds in their new position and locks it in. Hurried here and the curl drops within weeks.
6 · Unwind and finish
Rods out, conditioned at a low pH, dried the way you will dry it at home — so you leave knowing exactly what it does.
What you actually get
No tools
No tongs, no round brush, no wand. Rough dry with your fingers and the curl arrives on its own.
It reads as your hair
Because it is curliest dry, it looks like hair that grew that way rather than hair that was done.
Body and apparent thickness
Root lift and separation through the length make fine hair look considerably fuller.
More forgiving
Softer, glossier and less prone to frizz than a cold permUP, and far less punishing if your styling is careless.
Who it suits — and who it does not
Ideal
S2 – W3 · damage at N
A slight natural bend at most, healthy bonds, and someone who wants the result without learning a technique. The most requested UP treatment for good reason.
Very good for
Fine hair that reads as flat or thinning
Curl that springs dry creates apparent density. This is the treatment people are usually describing when they say they want their hair to look thicker.
Usually no
Bleached, or damage at DD
Heat plus chemistry on hair with destroyed cystine is the worst combination on this site. A curl will go in and drop, and the hair will not forgive it. This is a consultation question, not a web-page one.
Book a mini consultation →No surprises
Things I would rather you heard from me than found out in the chair
None of this is in anybody else's brochure. It is all true, and knowing it in advance is the difference between a surprise and a plan.
It will smell
Anything heated to 200 degrees smells — think of food. Your own mousse or styling product on there smells too. Some treatments frankly smell like wet dog for a day. I work next to an open window and it clears, but I am not going to pretend it does not happen.
Some treatments shift your colour
Not all, but some will lift or warm what is already on your hair. If that applies to yours I will tell you before we start and we plan around it. I spent years as a colourist, so this is a conversation rather than a surprise at the mirror.
It can go flat
Certain hair looks bouncy for a fortnight and then sits down. I can usually work around it — leaving the roots alone, choosing a lighter strength, changing where I place the tension. But only if I know beforehand that volume matters to you. Say it at the consultation, not afterwards.
Damage is the thing we are trying not to do
These are chemical services and they are not free. Done properly on suitable hair the trade is small and worth it. Done wrong, or on hair that has already been through too much, it is breakage — which is exactly why sometimes the answer is no.
The first two visits, we are getting to know each other
This is the most useful thing on the page, and the thing almost nobody says out loud.
The first appointment is a learning appointment
I do not know your hair yet — and I do not know you. I know the chemistry; I do not yet know how yours takes it, what the last person left in it, or the life it has to survive: your mornings, your training, your travel, how much time you will honestly give it. So I work carefully the first time, and careful means slightly under rather than slightly over. That is deliberate. I can always add more next time. I cannot take it back out.
The second visit is where it comes together
By then I have seen how your hair behaved, how long it held and what it did in week six — and you have lived with it, and can tell me what you actually thought. Now I can push further or pull back with something real to go on. If the first result is good but not quite it, that is not a failure. That is the information.
My “perfect” and your “perfect” may not be the same thing
I might look at your hair and see a result I am pleased with — even, healthy, doing exactly what the chemistry should do. You might look in the mirror and want it flatter, or curlier, or with more root left in. Neither of us is wrong. We are looking at different things.
So tell me, in your own words
Tell me what you want it to look like before we start, and tell me afterwards if it is not that. Not to complain — so I can adjust it next time. The clients whose hair I get right consistently are almost always the ones who told me what they actually wanted on visit two.
And the honest end of it: maybe I am not the right stylist for you. I am not saying I am — I am trying, and by the second visit we will both know. I would rather give you that sentence than a guarantee nobody could honestly make.
Whatever it is called elsewhere, this is the category.
Digital perm · Hot perm · C-curl perm · Korean perm · Volume magic · Setting perm
Largely the same technique under different national names. It is the standard permUP across Seoul and Tokyo, and comparatively rare in London — which is why most people here have never been offered it.
Wavement HotUP is my own system. Read the perm guide for the cold-versus-hot comparison and Korean systems for where it came from — both free.
Colour
When to do your colour
PermingUP and colour both work on the same hair, and doing them in the wrong order or too close together is how people end up with damage they blame on the perm.
Colour after, not before
Leave at least two weeks
Perm first, let it settle, then colour. Colouring immediately before means putting a second chemical process onto hair that is about to have its bonds opened.
Bleached hair
The honest limit
Bleach destroys the very bonds a perm needs to grip. A curl can be put into bleached hair; it will not bounce, and it will drop within weeks. This is where I say no most often on the UP side.
Tell me everything
Including henna and box colour
Henna and metallic salts react badly with perm chemistry — occasionally violently. Anything in your hair, however long ago, I need to know about.
Skin test
I do not routinely do one for straightening or perming, and there is no blanket UK requirement for these services — it is the product manufacturer and the insurer that drive it, not the law. Where a specific product calls for one, I will tell you and we will do it. Hair colour is a different matter: there it is effectively mandatory.
Strand and elasticity testing
Also not routine. I read the hair at the consultation and again on the day. Where I judge it necessary, I will say so before we start — and we test before anything else happens, rather than finding out halfway through.
What actually protects the hair
Knowing what has already been done to it. Colour history, previous chemistry and how it was cared for tell me more than any test — which is why I ask for the history before I ask what you want.
Making it last
The first 48 hours
The bonds are freshly reformed and still settling. No washing, no tight ties, no clips, no brushing it out. Scrunch rather than comb, and let it dry in its own shape.
Never brush it dry
The single biggest mistake with any perm. Brushing dry curl separates it into frizz. Comb through with conditioner in the shower, then leave it alone — fingers and a diffuser only from then on.
What you wash it with
You do not have to give up lather. A gentle sulphate cleanser is fine; heavy strippers dry curl out fast. Two or three washes a week, always with conditioner.
Not sure about yours? Send me a photo of the ingredient list and I will tell you whether to keep it.
The terms, plainly
The same glossary appears on every treatment page here, so the language means the same thing wherever you read it — with what each term means for this particular treatment underneath.
pH
The acid-to-alkaline scale. Hair sits at about 4.5–5.5, slightly acidic. Alkaline products swell and open the cuticle so chemistry can get in — more change, more cost to the hair. Acid products close and smooth it — gentler, shinier, less penetration.
On Wavement HotUP: alkaline for the reduction, then heat does the shaping. Two mechanisms rather than one, which is why it is the more technical of the two permsUP.
Disulfide bonds
The strong, permanent sulphur-to-sulphur links. They give hair both its strength and its bounce. Hydrogen bonds, by contrast, are weak and temporary — broken by water and heat, which is why a blow-dry drops in the rain.
On Wavement HotUP: opened chemically, then re-set under heat on the rod. That heat-set memory is why the curl activates as the hair dries rather than when it is wet.
Porosity
How easily hair absorbs and holds water and chemicals. High porosity means a raised, damaged cuticle: it soaks product up fast and processes quickly and unevenly. Low porosity is resistant and needs more time.
On Wavement HotUP: critical, because heat and porosity together are how damage happens. Porous hair gets lower temperatures and shorter contact — or it does not get this treatment.
Bounce (elasticity)
The ability to stretch and spring back, governed almost entirely by disulfide bond health. You can impose a shape on almost any hair. You cannot impose bounce — it has to be earned from healthy bonds.
On Wavement HotUP: what you are actually buying. The spring that appears as the hair dries only exists if the bonds can provide it.
Reduction and neutralisation
The two-step chemistry of any perm or relaxer. Reduction breaks the bonds so the hair can be reshaped; neutralisation reforms them in the new shape and locks it in.
On Wavement HotUP: both. Neutralisation locks the heat-set shape. Hurried here and the curl is gone within weeks.
Processing time
Timed to the hair, not to a clock on the wall. Porosity, texture and history all change how fast a treatment develops.
On Wavement HotUP: three to four hours — longer than a cold perm, because each rod is heated and controlled individually.
Read further
Where this sits in the wider family
The free guides covering each tradition — what is in them, where they came from and who they suit.
The perm guide
Cold versus digital, what each does to the curl, and why the modern perm looks nothing like the one you are picturing.
Open the guide →Perm rods — size vs shape
The rod decides the result. How size and shape change the curl completely.
Open the guide →Korean systems
Where the digital and hot perm traditions come from, and how they differ from the Western cold perm.
Open the guide →Home care
What to wash it with, what to avoid, and how to make the result last months longer.
Open the guide →Conditioning
What conditioning actually does, what it cannot do, and which claims on the bottle are marketing.
Open the guide →The complete guide
The whole subject, both directions, free and holding nothing back.
Start here →Questions people actually ask
What is the actual difference from a cold perm?
When the curl shows. Cold is curliest wet and relaxes as it dries. Hot is soft wet and springs as it dries. That one difference changes how it looks, how you style it and who it suits.
Will it look permed?
Less so than anything else here. Because the curl arrives as the hair dries, it reads as natural texture. That is precisely why it took over in Korea and Japan.
Do I need to learn how to style it?
No — that is the point. Wash, rough dry with fingers or a diffuser, done. If you want more definition, scrunch a little product in while damp.
Is it more damaging because of the heat?
It is more technical, which is a different thing. Controlled heat on hair that can take it is fine; uncontrolled heat on hair that cannot is not. On bleached hair I will say no.
Will it make my hair look thicker?
Generally yes, and it is one of the main reasons people book it. Root lift plus separation through the length reads as density.
How is it different from just using tongs?
Tongs last until the next wash or the next shower of rain — hydrogen bonds only. This is in the disulfide bonds, so it lasts months and it is there every time your hair dries.
Is it safe if I am pregnant or breastfeeding?
That is not my decision to make for you. I will give you the full ingredient list for the exact product I would use so you can decide with your midwife, GP or pharmacist.
Can men have this?
Yes, and it is common in Seoul and Tokyo. On the men I see the answer is more often Wavement Cold, and I will tell you which suits your hair and your cut.
Real prices, published.
Four questions about your hair and the calculator gives you the exact price for your length and texture, and the appointment to book. No “from” prices that grow once you are in the chair.
See prices & bookAll UP treatmentsNot sure this is the right one? A mini consultation online is a questionnaire and six photos — the exact fee is on the booking page. Paid in full when you book. The fee does not come off a treatment. Every treatment includes the full consultation in the chair, on the day, at no charge.