What is a keratin treatment and how does it work?

A keratin treatment is a salon service that smooths and strengthens hair by infusing protein into the hair shaft and sealing it with flat-iron heat. It reduces frizz, adds shine, and makes hair much easier to style. The result is semi-permanent and lasts 3 to 5 months.

How long does a keratin treatment last?

Results typically last 3 to 5 months depending on aftercare. Using sulphate-free shampoo, washing every 2 to 3 days instead of daily, and reducing heat styling all help extend the results. Regular moisture treatments between sessions can also prolong the smooth finish.

Can I still colour or style my hair after keratin treatment?

Yes. Keratin does not prevent you from colouring, curling, or heat styling your hair. In fact, most clients find their hair needs less heat and less time to style after the treatment. If you want to combine keratin with a colour service, your stylist can advise on the best sequence.

Is keratin treatment suitable for all hair types?

Keratin works well for most hair types, especially frizzy, wavy, curly, and colour-treated hair. It is not recommended for very fine or flat hair (the added protein weight can make it look limp) or heavily bleached hair that is already fragile.

How much does keratin treatment cost at Miin Singapore?

At our Orchard salon, pricing is based on hair length: $250 for short hair, $300 for medium, $350 for long, and $400+ for extra long. All stylist tiers are the same price for this service.

Korean Keratin Treatment Singapore: What to Know

Q: Does keratin treatment cause hair loss?

No. The formula is applied to the hair shaft, not the scalp, so it does not affect hair follicles or cause thinning. Any shedding you notice after the appointment is normal daily hair fall that was released during washing and brushing.

Keratin is a natural protein already in your hair — the treatment replenishes what heat, colour, and humidity strip away.
The Miin Keratin treatment coats the hair shaft with a protein formula and seals it using a flat iron for a smooth, frizz-resistant finish.
Results are semi-permanent, lasting 3 to 5 months with proper aftercare.
Pricing at our Orchard salon ranges from $250 (short) to $400+ (extra long), consistent across all stylist tiers.
Not ideal for very fine or flat hair, or hair that has been heavily bleached.
Aftercare is essential: no washing for 72 hours, sulphate-free shampoo, and reduced heat styling.

Quick answer

A Korean keratin treatment is a salon service that smooths frizz, adds shine, and cuts styling time by infusing protein into the hair and sealing it with heat. At Miin in Singapore, the treatment runs from $250 to $400+ depending on hair length, lasts 3 to 5 months, and works well for most hair types — especially frizzy, wavy, or colour-treated hair dealing with Singapore's humidity.

What a keratin treatment does

Hair is made mostly of keratin protein. Over time, heat styling, chemical services like colouring, and daily exposure to Singapore's humid climate break down that protein layer. The result is frizz, roughness, and hair that takes forever to blow-dry.

A Korean keratin treatment works by applying a liquid protein formula to clean hair, then sealing it strand by strand with a flat iron. The heat locks the protein onto the cuticle, creating a smooth, protective barrier. Unlike rebonding, which permanently alters your hair's bond structure, keratin is semi-permanent — your natural texture gradually returns over a few months rather than growing out with a visible line.

The treatment is not a straightening service. It smooths and reduces frizz, but your natural wave or curl pattern will still be present, just more controlled and manageable.

How the treatment works at Miin

Here is what to expect during a Korean keratin treatment appointment at our Orchard salon:

1. Consultation and hair assessment

Your stylist examines your hair's condition, texture, and history (colour, bleach, previous treatments) to determine the right formula and processing approach. This step takes about 5 to 10 minutes.

2. Clarifying wash

Hair is washed with a clarifying shampoo to strip away product buildup, oils, and residue. The keratin formula needs direct contact with the hair shaft to absorb properly, so clean hair is essential.

3. Keratin application

The protein formula is applied section by section, ensuring even coverage from root to tip. This is done by hand to control how much product each section receives — thicker, coarser hair may need more than fine hair.

4. Processing time

The formula is left to sit for 20 to 30 minutes so it can penetrate the hair shaft. During this time, the protein bonds to the cuticle layer.

5. Blow-dry and flat iron seal

Hair is blow-dried smooth, then a flat iron is used at a controlled temperature to seal the keratin in place. This is the step that locks in the results — the heat activates the protein bond and creates the smooth finish.

6. Aftercare briefing

Your stylist walks you through the post-treatment rules (no washing for 72 hours, sulphate-free products, how to maintain results). The full appointment takes around 1.5 hours depending on hair length and density.

Who should consider a Korean keratin treatment

The treatment works well across a range of hair types and is especially helpful if you are dealing with:

Frizz in humidity. Singapore's year-round tropical humidity puffs up the cuticle and creates frizz. Keratin seals the cuticle flat, creating a barrier that resists moisture.
Colour-treated hair that feels rough. Colouring opens the cuticle, and if it doesn't close properly afterward, hair feels coarse and dry. Keratin smooths it back down, improving both texture and shine.
Long blow-dry times. If your morning blow-dry takes 30+ minutes, keratin can cut that significantly. The hair cooperates with the brush instead of fighting it.
Wavy or curly hair that you want more manageable. Keratin won't remove your curl pattern, but it will make it smoother, more defined, and easier to style either curly or straight.

Who should avoid it

Keratin is not the right fit for everyone. Consider skipping it if:

Your hair is very fine or flat. The added protein weight can make already-limp hair look lifeless and oily. A lighter treatment like our Miin Express or Miin Signature would be a better fit.
You have heavily bleached or very damaged hair. If hair is brittle from excessive lightening, the flat iron heat during sealing can cause further stress. Your stylist may recommend repairing with a treatment series first before doing keratin.
You have an irritated or sensitive scalp. Any chemical salon service should be avoided if your scalp is inflamed or compromised. Consult your stylist first.

Being upfront about who it's not for is part of giving good advice. If keratin isn't the right call, our stylists will tell you and recommend an alternative from our treatment menu.

Common concerns about keratin treatment

Does keratin treatment cause hair loss? No. The formula is applied to the hair shaft itself, not to the scalp. It coats and strengthens existing strands — it does not affect the follicle or interfere with hair growth. If you notice shedding after any salon service, it is usually from normal daily hair fall that was trapped and released during washing and brushing, not from the treatment itself.

Is the formula safe? Traditional keratin treatments used formaldehyde as a bonding agent, which raised health concerns. Modern Korean formulas — including the ones used at Miin — are formaldehyde-free. They rely on alternative bonding compounds that achieve the same smoothing effect without the fumes or irritation associated with older formulas.

Miin Keratin pricing in Singapore

Pricing is based on hair length. All stylist tiers (Stylist, Senior Stylist, Director, Creative Director) are the same price for this service, so you get the same formula and process regardless of which stylist you book.

Short hair: $250
Medium hair: $300
Long hair: $350
Extra long hair: $400+

The appointment takes around 1.5 hours. You can combine keratin with a colour service in the same session to save time — your stylist can advise on the best sequence.

For clients who want smoothing without the full keratin commitment, we also offer:

Miin Express (3-step): $100 to $130+ — lighter protein treatment
Miin Signature (5-step): $200 to $260+ — our premium repair service with boosters

How long does a Korean keratin treatment last?

Results typically last 3 to 5 months. The treatment fades gradually — you will notice frizz returning at the roots first, since new growth comes in untreated. There is no hard cutoff; just rebook when your hair starts feeling harder to manage again.

Factors that shorten the lifespan:

Washing daily (stretching to every 2-3 days helps significantly)
Using sulphate-based shampoo
Frequent swimming in chlorinated pools or salt water
Excessive heat styling

Factors that extend it:

Sulphate-free, sodium-chloride-free shampoo
Reducing wash frequency
Lowering heat tool temperatures
Using a silk pillowcase to reduce friction
Regular moisture or protein treatments between sessions

Scheduling a professional treatment — like a Miin Express ($100 to $130+) or Miin Signature ($200 to $260+) — once a month keeps the hair hydrated and reinforces the keratin coating. Well-moisturised hair holds onto the treatment longer because the cuticle stays sealed and smooth rather than drying out and lifting.

Aftercare tips for lasting results

The treatment itself is only half the equation. How you care for your hair afterward determines whether you get 2 months or 5 months of smooth results.

Wait 72 hours before washing. This is the most important rule. The keratin is still bonding during this window. Avoid getting hair wet from rain, sweat, or washing. Keep it down — don't tie it up with clips or bands that could create dents in the newly sealed surface.

Switch to sulphate-free shampoo immediately. Sulphates and sodium chloride strip the keratin coating aggressively. This is non-negotiable — but "sulphate-free" alone is not enough. Avoid shampoos containing sodium chloride (salt), alcohol-based styling products, and clarifying or deep-cleansing formulas that are designed to strip buildup. These all break down the protein coating faster. Your stylist can recommend specific brands that work well with keratin-treated hair.

Wash less often. Every wash removes a thin layer of the protein coating. Stretching to every 2 to 3 days makes a measurable difference over months. Dry shampoo at the roots between washes keeps hair fresh without water contact.

Use less heat. Your hair will be much easier to style after keratin — you likely won't need your iron or dryer at the same temperature. Dialling down the heat reduces stress on the coating and extends its life.

Avoid chlorine and salt water. Both accelerate keratin breakdown. If you swim regularly, wet your hair with fresh water before getting in, and rinse thoroughly with sulphate-free shampoo after. A leave-in conditioner adds an extra protective layer.

Consider a silk pillowcase. Cotton creates friction that gradually roughens the sealed cuticle. Silk lets hair glide, reducing frizz and extending the smooth finish.

Book a consultation

Curious whether a Korean keratin treatment is right for your hair? Our stylists at Orchard can assess your hair condition and recommend the right approach in a quick consultation — whether that is keratin, a lighter treatment, or a different service entirely.