Quick answer: glass hair is hair so smooth it reflects light like a mirror. You get it at home by washing gently, using a glossing conditioner on every wash, blow-drying downwards and finishing with a few drops of light oil. Our pick for the conditioner step is Kérastase Gloss Absolu Insta Glaze, our price $57.75 (RRP $77). It is our second best seller, and it is the step most people skip.
Updated 15 November 2026 by the stylists at Next International, an authorised Kérastase salon in Oxenford and Upper Coomera on the Gold Coast since 1992.
What is glass hair, and why does mine look dull?
Glass hair is the high-shine, swishy finish all over TikTok and Instagram. It looks like a filter, but it comes down to one thing: a flat, smooth cuticle. When the outer layer of each strand lies flat, light bounces off it evenly and hair looks glossy. When the cuticle is lifted, light scatters and hair looks dull, even when it is healthy.
The usual reasons we see in the chair:
- Dehydration. Dry lengths have a rough surface, so they cannot reflect light.
- Build-up. Heavy products and hard water leave a film that dulls the surface.
- Heat. Hot tools without protection rough up the cuticle over time.
- Humidity. On the Gold Coast, moisture in the air swells the hair and lifts the cuticle. That is why hair can look shiny when you leave the house and fuzzy by lunch.
- Old ends. Split, frayed tips will never shine. A trim every 8 to 12 weeks keeps the edges sharp.
Can you get glass hair at home, or do you need a salon gloss?
| Gloss Absolu at home | Salon gloss service | |
|---|---|---|
| What it does | Hydrates and smooths the hair surface on every wash | Adds shine and refreshes or tweaks your colour |
| Best for | Long hair that is dull, frizzy or tangles easily | Coloured hair that has faded or lost its depth |
| How long it lasts | Kérastase says up to 4 days of glossy hair, using shampoo, conditioner and oil | Fades gradually over several weeks of washing |
| Time | 3 to 5 extra minutes in the shower | A salon visit |
| Cost | Insta Glaze, our price $57.75 (RRP $77) | From $60 short, $70 medium, $80 long |
They work well together. A salon gloss sets the colour and shine, and the home routine keeps the surface smooth between visits. Our guide to hair gloss vs toner explains the salon side in more detail.
What makes Insta Glaze different from a normal conditioner?
Kérastase calls it a gloss enhancing conditioner for long hair prone to frizz. It is built on three ingredients, and here is what Kérastase says each one does:
- Hyaluronic acid holds water in the hair, so the lengths stay plump and supple.
- Glycolic acid refines the hair surface, which helps it reflect more light.
- Wild rose oil nourishes and gives the range its scent.
In the salon, what we notice is the slip. It detangles long hair quickly without coating it, so fine hair still moves. It is a rinse-out cream, not a leave-in.
Which Gloss Absolu products do I need?
Start with Insta Glaze Conditioner. If you only buy one product, make it this one. It does the most for shine and detangling, and it is light enough to use every wash.
Pair it with Bain Hydra-Glaze Shampoo for fine to normal hair. It is a light gel that cleans off build-up without stripping, so the conditioner has a clean surface to work on.
Thick, coarse or curly hair? Swap to Crème Hydra-Glaze Shampoo, our price $48 (RRP $64), and add the Crème Hydra-Glaze Mask, our price $75 (RRP $100), once a week.
Add Gloss Absolu Spray if you blow-dry. Its full name is Anti-Frizz Glaze Milk. It detangles, smooths and, Kérastase says, protects from heat up to 230°C.
Finish with Glaze Drops. This is the mirror-shine step. The dropper stops you overdoing it, which is the most common way people end up with greasy ends instead of glossy ones.
The full four-step routine of shampoo, Insta Glaze, spray and oil comes to $229.50, which also gets you free shipping.
How do I get glass hair at home, step by step?
- Shampoo the scalp, not the lengths. Massage a chestnut-sized amount of Bain Hydra-Glaze into the roots and let the suds rinse through the ends.
- Squeeze out the water. Press gently with a towel. Conditioner works better on hair that is not dripping.
- Apply Insta Glaze to the lengths and ends. Use enough to coat every strand, then comb it through with a wide-tooth comb.
- Leave it for 3 to 5 minutes. Kérastase recommends this window. Use it to wash your face or shave.
- Rinse well, finishing cool. Rinse until the hair feels slippery but not coated. A cool final rinse helps the surface lie flat.
- Spray before heat. Mist Gloss Absolu Spray through towel-dried lengths and comb again.
- Blow-dry downwards. Use a nozzle and point the airflow from root to tip, working in sections with a paddle or round brush. This is what flattens the cuticle.
- Seal with 1 to 2 drops of Glaze Drops. Warm them in your palms and smooth over the mid-lengths and ends only. Add a third drop on very long or thick hair.
Straightening is optional. If you do use an iron, keep it on a moderate setting and make one slow pass per section rather than several fast ones.
Why does my shine disappear in Gold Coast humidity?
Humid air pushes moisture into dry hair, the strand swells and the cuticle lifts. Hair that is already well hydrated takes on less of it, which is why the conditioner step matters more here than in drier cities. If puffiness, rather than dullness, is your main problem, our frizzy hair guide covers the humidity routine and the Frizz-Glaze Cream, our price $63.75 (RRP $85).
Frequently asked questions
What is glass hair?
Glass hair is very smooth, high-shine hair that reflects light like a mirror. It comes from a flat cuticle, good hydration and a careful blow-dry, not from one product.
How do I use Kérastase Insta Glaze conditioner?
After shampoo, squeeze out excess water and apply it to the lengths and ends. Leave it for 3 to 5 minutes, then rinse well. Use it every time you wash.
How long does the shine from Gloss Absolu last?
Kérastase says up to 4 days of glossy hair, based on a consumer test of the shampoo, conditioner and oil used together. Humidity, sweat and dry shampoo will shorten it.
Can I get glass hair with thick or curly hair?
Yes, though the shine looks different on curls. Use the Crème Hydra-Glaze Shampoo and Mask, which are made for thick and curly hair, and finish with a drop of Glaze Drops.
Is Insta Glaze a leave-in conditioner?
No. Insta Glaze is a rinse-out conditioner. The leave-in in the range is Gloss Absolu Spray, also called Anti-Frizz Glaze Milk.
Should I get a salon gloss or use Gloss Absolu at home?
Book a salon gloss if your colour has faded or looks flat. Use Gloss Absolu at home to keep hair smooth and shiny between visits. Most clients get the best result from both.
Need help choosing?
Next International is an authorised Kérastase stockist with salons in Oxenford and Upper Coomera, and we sell the current range online at 25% below RRP.
Not sure whether you need a product or a salon gloss? Our stylists can look at your hair and tell you, or do a gloss service on the day: book online in Oxenford or book online in Upper Coomera, or shop the Gloss Absolu range. Standard shipping is free Australia-wide on orders over $200. Otherwise it is $14 standard (2 to 8 business days) or $18 express (1 to 5 business days), and click and collect from our Oxenford salon is free.
