"How long will it last?" is the first thing almost everyone asks before booking a keratin treatment — fair enough, given the investment. The honest answer: 3–6 months, and a lot of that range is in your hands.
The short answer: 3–6 months
A professional keratin treatment typically lasts three to six months. It doesn't fall out overnight — it fades gradually as it washes out, so your hair eases back to its natural texture rather than changing suddenly.
What affects how long it lasts
- How often you wash. Every wash removes a little of the treatment. Washing 2–3 times a week instead of daily makes a big difference.
- Your shampoo. Sulfates and salt strip keratin fast. A sulfate-free shampoo is the single most important factor.
- Your hair type. Fine, straighter hair tends to hold results longer; thick, very curly or coarse hair may wear faster.
- Water exposure. Chlorine (pools) and salt water (sea) accelerate fading.
- Heat and styling. Gentle styling helps it last; harsh daily heat shortens it.
How to make yours last longer
- Wait 48 hours before the first wash.
- Use a sulfate-free shampoo — always.
- Wash less often (2–3 times a week).
- Use heat protection when you style.
- Rinse after swimming and avoid heavy chlorine/salt exposure.
Our full keratin aftercare guide covers the do's and don'ts in detail.
Signs it's time to rebook
You'll notice frizz creeping back, your hair taking longer to style, and less shine. That's the cue to book your next keratin treatment — most people return every 3–4 months.
Is it worth it?
For months of smooth, frizz-free, low-effort hair, most clients find it well worth it. See current prices by hair length, learn what a keratin treatment is, or book in Belfast or Carrickfergus.
