How long does a keratin blowdry last?

If you’re used to blowdries that last until the next gust of wind or spot of rain, a keratin blowdry might just surprise you. It’s not your usual styling session — this one leaves your hair smoother for weeks, not hours. The difference lies in the treatment itself. A keratin blowdry isn’t just a quick fix; it’s a semi-permanent smoothing treatment that rebuilds protein and calms down frizz.

Rather than blasting your hair with heat and hoping for the best, your stylist applies a keratin-rich solution, then seals it in with a flat iron. That’s what gives it staying power. It tames your hair without changing its structure, meaning your waves or curls won’t disappear — they’ll just behave a bit better.

Your Solihull Hairdresser will always check your hair type before recommending it, but it tends to work wonders for anyone who’s fed up with fighting the frizz every morning.

So, how long does it actually last?

For most people, a keratin blowdry lasts somewhere between eight and twelve weeks. That depends on a few things — how often you wash your hair, what products you’re using, how much sun or salt water it’s exposed to, and even how often you tie it up.

If you’re using sulphate-free shampoo, avoiding rough towel drying, and not washing your hair daily, you’ll likely get the full twelve weeks out of it. On the other hand, if you’re using strong cleansing products or washing every day, the results will fade quicker.

And just to be clear, the treatment doesn’t wear off in one go. You’ll notice the frizz starts to creep back gradually. It’s not a sharp drop-off — more of a slow slide back into your usual hair behaviour.

How to make it last as long as possible

Once you’ve had the treatment, your stylist will give you some aftercare advice. Don’t ignore it. Following it properly makes all the difference.

The golden rule is to avoid shampoos with sulphates or salts. These strip the keratin out faster than anything else. The gentler the shampoo, the longer your smooth finish will hang around.

Also, don’t go wild with dry shampoo or styling products that leave residue. Build-up makes your hair harder to manage and can dull the shine. And be gentle when drying — a soft towel or old T-shirt is better than rough rubbing.

If you’re someone who swims often, just be aware that chlorine and salt water can shorten the lifespan of your blowdry. A good leave-in conditioner or swim cap can help protect it.

Is it worth the time and money?

The first time you sit in the chair for a keratin blowdry, it might feel like a bit of a commitment. You’re looking at a couple of hours for the appointment, and it’s not the cheapest treatment on the menu.

But when you consider the time saved every morning — not to mention fewer straightening sessions, fewer products, and less heat damage — a lot of clients find it’s well worth it. You step out of the shower and your hair’s already halfway there.

Your hairdresser in Solihull can also suggest whether to go for a full keratin blowdry or a lighter version, depending on what your hair needs most.

For the best Solihull hairdresser, look no further than Salon No. 100! We’ve gathered hundreds of five-star reviews over the past few years. Call 07966 105306 and book your appointment today!