Keratin questions
The questions asked at the chair, answered here instead. Anything not covered is worth a message — an answer without a booking attached is still an answer.
Is a keratin treatment permanent?
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No, and it is not designed to be. It is a coating and sealing treatment that fades gradually over weeks to a few months, leaving your own texture behind exactly as it was. Because it does not alter the hair's internal bonds, there is no regrowth line and no point at which it has to be corrected — when it has worn off, you simply decide whether to repeat it.
When can I wash my hair afterwards?
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You will be given an exact wait at the chair, because it depends on the formulation used on you. Whatever the number, treat that window seriously: leave the hair loose, avoid clips, bands and tucking it behind your ears, and do not tie it up to sleep. A kink pressed in during that period can set, and correcting it means heat the hair did not need.
Do I really have to change my shampoo?
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Yes — this is the single condition the treatment depends on. Sulphates and sodium chloride strip the seal, and an ordinary shampoo can take weeks off the result in a handful of washes. If switching is not something you want to do, that is a good reason not to book the treatment, and we would rather say so beforehand than take the appointment.
Can it be done on coloured hair, and in what order?
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Usually yes, and the order matters. Colour is generally done first, with a gap before the keratin, since the sealing step can lift a fresh tone slightly and colour applied afterwards behaves unpredictably on a sealed cuticle. Heavily bleached hair is a different conversation: if the ends are porous and fragile, sealing them is not the treatment they need. The plan and the gap are agreed at the consultation rather than improvised on the day.
I have curly hair. Will keratin take my curls away?
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It loosens and organises them rather than removing them. Expect a softer, more defined pattern, much less frizz between the curls, and far less resistance if you choose to blow-dry it straight. Your curl returns as the treatment fades. If the goal is to be rid of the curl rather than to manage it, keratin is the wrong booking and a structural service should be discussed instead — with its own trade-offs stated first.
What about formaldehyde?
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The lines kept here are chosen as formaldehyde-free, and you are welcome to ask which product is being used and to see the packaging before it is opened. The answer you get is the product name, not the category. Ventilation and technique still matter with any sealing treatment, and the salon works accordingly.
How soon can it be repeated?
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When the previous treatment has genuinely worn off, which for most guests is a few months rather than a fixed schedule. Re-sealing hair that is still sealed adds weight without adding benefit, and on finer hair that reads as limp. The hair is reassessed at each visit and repeating is sometimes declined for exactly that reason.
Will it make fine hair look flat?
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It can, if the wrong formulation is used or if it is applied too close to the root. Fine hair is assessed carefully for that reason: a lighter product, less of it, and application kept well away from the scalp usually gives the frizz control without the collapse. Where fine hair is also limp to begin with, the honest recommendation may be conditioning work instead, and you will be told that before you book.