You’ve heard the promise: smoother, glossier, frizz-free hair for months at a time. But if you’ve never had one before, a keratin treatment can feel like a bit of a mystery — what actually happens during the appointment, how long you’ll be sitting in the chair, and what your hair will feel like walking out. At Glow Room in Bristol, we get asked these questions often, so here’s the full, honest walkthrough of what a keratin treatment really involves, from consultation to final blowout.

What a Keratin Treatment Actually Does

Keratin is a protein that hair is naturally made of, and over time — through heat styling, colouring, sun exposure and general wear — hair loses some of this structural protein, leaving it more prone to frizz, dryness and breakage. A professional keratin treatment works by depositing a keratin-rich formula into the hair, then using controlled heat to help it bond to the cuticle. The result is hair that’s smoother, more resistant to humidity, and considerably faster to style, without permanently straightening away your natural movement the way a relaxer would.

Who Is This Treatment For?

• Naturally coarse, frizzy or unmanageable hair that takes too long to style at home.
• Stressed, brittle lengths in need of intensive, high-performance smoothing and repair.
• Anyone with a busy lifestyle who wants to cut down daily heat styling while keeping a polished, healthy-looking finish.

The Real Benefits

• Dramatically cuts styling time — hair dries faster and smoother, needing minimal flat-ironing to finish.
• Complete frizz elimination — blocks out humidity, keeping hair sleek and glossy in most weather conditions.
• Deep repair and strengthening — fills in microscopic gaps along damaged cuticles to help stop ongoing breakage.
• Maintains natural movement — smooths without flattening away your hair’s natural body, so it stays fluid rather than stiff.

Step by Step: What Happens During Your Appointment

1. In-Depth Structural Evaluation

Every appointment starts with a careful consultation. Your stylist checks your hair’s density, texture and current condition, and talks through your lifestyle and styling habits to select the formula strength that best matches your goals.

2. Purifying Deep Cleanse

Your hair is washed with a professional clarifying shampoo. This essential step lifts away stubborn styling product residue and gently opens the outer cuticle layer, so the keratin formula can penetrate effectively rather than sitting on the surface.

3. Keratin Application

The keratin formula is applied section by section through the mid-lengths and ends, ensuring even coverage across the hair.

4. Thermal Seal & Blowout Reveal

After a smooth blowout, your stylist uses a specialised flat iron at a controlled temperature to safely seal the formula into the cuticle. This locks in structural moisture, smooths away frizz and split ends on the surface, and reveals a high-gloss, polished finish.

How Long Does It Take?

A full keratin treatment is a longer appointment than a standard cut or trim, given the multiple stages involved — consultation, cleanse, careful application, and the thermal sealing process. Your stylist will confirm an accurate time estimate based on your hair’s length and thickness during your consultation.

Duration & Pricing

Pricing is based on hair length and thickness, currently offered as part of a limited introductory rate:

• Keratin Hair Treatment (Shoulder Length): £150
• Keratin Hair Treatment (Long Hair): £200
• Keratin Hair Treatment (Thick & Long Hair): £250

As with all our treatments, current pricing and offers are confirmed at the time of booking.

Caring for Your Hair After a Keratin Treatment

What you do in the first few days after your treatment plays a big role in how long your results last. Avoid washing your hair, tying it up, or clipping it back for at least the first 24 to 72 hours, depending on your stylist’s guidance — this gives the keratin time to fully bond to the hair shaft. Once you do start washing again, switch to a sulphate-free shampoo and conditioner, since sulphates strip the treatment away faster than it would naturally fade. Try to limit how often you use hot styling tools, and when you do, always use a heat protectant. With the right aftercare, most clients see results lasting several months before a touch-up is needed.

Frequently Asked Questions

Will a keratin treatment make my hair completely straight?

No — a keratin treatment smooths and reduces frizz while keeping your hair’s natural movement. It’s a smoothing treatment, not a permanent straightening service, so waves and curls soften rather than disappear entirely.

How soon can I wash my hair afterwards?

This depends on the formula used and your stylist’s specific guidance, but it’s typically recommended to wait at least 24 to 72 hours before your first wash to allow the treatment to fully set.

Is a keratin treatment safe for coloured hair?

Many clients with coloured hair have keratin treatments successfully. Let your stylist know about any recent colour services during your consultation so they can advise on the best approach and timing.

How often should I repeat the treatment?

This varies by hair type and how well aftercare guidance is followed, but most clients return for a touch-up every few months as the smoothing effect gradually fades with normal washing.

Keratin Treatment vs Regular Blowout: What’s the Difference?

A regular blowout smooths hair temporarily using heat and styling products, but that smoothness disappears the moment your hair gets wet or humid again. A keratin treatment works at a deeper level — the formula bonds to the hair’s structure itself, which is why the smoothing effect survives washing, humidity and everyday wear for months rather than hours. If you find yourself re-styling the same frizz every single morning, that’s the gap a keratin treatment is designed to close: it doesn’t just style your hair for one day, it changes how your hair behaves day to day.

Choosing the Right Keratin Treatment for Your Hair

Not every head of hair needs the same approach, which is why our consultation stage matters as much as the treatment itself. Thicker or longer hair generally needs a more intensive application to achieve an even result throughout, which is reflected in the length-based pricing. Finer or shorter hair may need less product and processing time. Your stylist will also factor in how often you colour or heat-style your hair, since this affects how your hair currently absorbs and holds a keratin formula. The goal is always a natural-looking result — smoother and glossier, but still recognisably your hair.

Making Your Results Last Longer

• Switch to sulphate-free products — sulphates in regular shampoo strip the treatment away far faster than normal wear would.
• Space out washes where possible — every wash gradually fades the effect, so washing every 2-3 days instead of daily helps results last.
• Avoid tying hair up in the first few days — creases and kinks can set into freshly treated hair if it’s clipped or tied too soon.
• Use a heat protectant — even with smoother hair, protecting against heat damage keeps results looking their best for longer.

More Frequently Asked Questions

Can I still curl or style my hair after a keratin treatment?

Yes — a keratin treatment smooths and reduces frizz, but you can still style hair as normal once the initial setting period has passed. Many clients find styling is actually faster and easier afterwards.

What’s the difference between the pricing tiers?

Pricing reflects the amount of product and time required for different hair lengths and thicknesses — shoulder-length hair needs less product and processing time than long or thick hair, which is reflected in each tier.

Will it damage my hair?

When carried out professionally with the correct formula and technique, a keratin treatment is designed to strengthen and repair hair rather than damage it. Your stylist will assess your hair’s current condition during consultation to confirm it’s a suitable fit.

Related Treatments

• Keratin Treatment: Benefits & Results — see the full picture of what results to expect
• Haircut Maintenance Guide — tips for keeping any style looking its best between visits
• Bob Blunt Haircut — pair a fresh cut with your smoothing treatment
• Glow Room Packages — explore packages that combine hair treatments

Book Your Keratin Treatment Today

Ready for smoother, more manageable hair? Book your Keratin Treatment at Glow Room via glowroom.uk, or call our team on +44 7597 732017 with any questions before you book.