Glossing Treatment / Toner Refresh: What It Is and Why You Need One

If your colour looks a bit tired, your blonde has gone the wrong kind of warm, or your hair just doesn't catch the light like it used to — you don't necessarily need a full colour appointment. Nine times out of ten, what you actually need is a gloss or a toner refresh. It's the secret weapon every colourist quietly relies on, and it's the difference between hair that looks "done" and hair that looks expensive.

Here's a practical guide to what they are, who they're for, and how to make yours go the distance.

What's the Difference Between a Gloss and a Toner?

People use these words interchangeably, and even within the industry the lines blur a little. Here's the simple version:

A gloss is a semi-permanent treatment that sits on the surface of the hair, sealing the cuticle and adding shine. It's mostly cosmetic. It can add a subtle tonal shift — a little warmer, a little cooler, a little richer — but its main job is shine. No ammonia, no peroxide, no commitment.

A toner is more corrective. It neutralises unwanted tones, usually after lightening — knocking out brassiness in blondes, calming warmth in highlights, or evening out a balayage that's started to look a bit yellow at the ends. Toners can be sheer or strong, and a good colourist will adjust the formula to your specific hair.

The two often live in the same appointment. At Gusto, when a client books a "gloss refresh", what we're really doing is reading the hair, deciding whether it needs tone correction, shine, or both, and mixing the right thing on the spot. You don't need to know which one to ask for — that's our job.

Who Actually Needs One?

Honestly, almost everyone. But here are the people who'll see the biggest difference:

Anyone with coloured hair that's a few weeks past their last appointment and looking flat or faded. Blondes whose hair has drifted brassy, golden or yellow — even good highlights pull warm as they oxidise. Brunettes whose colour has gone a bit dusty or one-dimensional. Anyone with natural hair that lacks shine — gloss isn't just for colour clients. People who want a low-commitment way to try a tonal shift before going all in.

The only people we'd say don't bother are anyone with very recently coloured hair that's already exactly where they want it. Save the gloss for a few weeks down the line.

What Happens in the Appointment

A gloss or toner refresh is one of the quickest in-salon services we offer — usually in and out in 30 to 45 minutes, depending on whether you want a blow-dry afterwards (you'll probably want a blow-dry afterwards).

Your colourist will look at your hair, decide on the formula, and apply it either at the basin or at the styling chair. It develops for 10 to 20 minutes — much shorter than a full colour — then gets rinsed out, conditioned and styled. There's no foil, no clingfilm, no scalp burn. It's a low-fuss, high-impact treatment and most clients are genuinely surprised at how much it changes the way their hair looks.

If you're coming in between colour appointments, this is a great moment to ask your stylist about a quick consultation on what to do next time. We see it as part of looking after the work we've already done.

How Long It Lasts (And How to Make It Last Longer)

A salon gloss or toner refresh typically lasts four to six weeks, sometimes stretching to eight if you really look after it. A few things make a real difference:

Wash less often and with cooler water. Daily hot showers strip the gloss off in a couple of weeks; washing two or three times a week with lukewarm water keeps it going. Use a sulphate-free shampoo, ideally a colour-safe one — sulphates are the main culprit for fading. Avoid chlorine and salt water, or wear a swim cap, because both eat through gloss fast. A weekly hair mask or a leave-in treatment helps lock the cuticle down and keeps shine high. And if you can be bothered, a purple or silver shampoo once a week will buy your blonde another couple of weeks before the warmth creeps back in.

The other big trick is just to keep up the rhythm. Booking a gloss every four to six weeks means your hair never quite gets to the dull, brassy, "I look terrible in photos" stage. It's the haircare equivalent of regular brows — small, frequent, and nobody knows why you always look polished.

Why It's Worth Building Into Your Routine

Most people don't think to book a gloss until something has gone visibly wrong. The clients who get the most out of it are the ones who treat it as maintenance, not rescue. A standalone gloss appointment is significantly cheaper than a full colour, takes a fraction of the time, and bridges the gap between bigger appointments so your colour always looks fresh.

It's also the single best thing you can do for shine that doesn't involve cutting your hair. If you've ever wondered how everyone on Instagram has glassy, mirror-finish hair — it's not a filter, it's almost always a recent gloss.

If you've never had one, this is a brilliant first appointment to book. It's quick, it's low-commitment, and it'll show you in 30 minutes what your hair is capable of looking like with the right care.

Book a gloss or toner refresh at Gusto Hair — Oxford Street, Soho or Covent Garden.