Top 10 Shampoos in Singapore for Chemically Treated Hair in 2025

Chemically treated hair such as rebonding or bleaching, requires more than just gentle hair care cleansing. You need shampoos that hydrate, protect, and maintain structure without causing further damage.

In 2025, the shampoo aisle isn’t just about fragrance and foam. Whether you’ve had a smoothening session, keratin treatment, or a full bleach and tone, this list ranks the 10 best shampoos in Singapore that are specifically formulated for chemically altered hair.

From bond-repairing formulas to moisture-sealing heroes, these shampoos are tested, reviewed, and worth your shelf space.

Comparison Table: Best Shampoos for Chemically Treated Hair (2025)

Product Name	Ideal For	Key Features	Price Range
Shiseido Professional Sleekliner	Rebonded hair	Tames frizz, heat protection	$38–$45
L'Oréal Serie Expert Pro-Keratin	Keratin-treated, dry hair	Pro-Keratin + Incell Complex	$35–$42
Milbon Repair Heat Shampoo	Damaged, colour-treated hair	Heat-protective ceramides	$48–$58
Moist Diane Extra Damage Repair	Affordable, bleached hair	Organic argan oil, keratin	$18–$22
Davines NOUNOU Shampoo	Bleached, brittle hair	Tomato extract, protein-rich	$48–$60
Olaplex No.4 Bond Maintenance	All chemical treatments	Patented bond-building formula	$52–$60
Kerastase Resistance Bain Therapiste	Severely damaged hair	Fibra-Kap Complex	$49–$55
K18 Peptide Prep pH Maintenance	Colour or bleach maintenance	pH-balanced, safe for daily use	$46–$54
Aveda Damage Remedy Restructuring	Dry, porous, coloured hair	Quinoa protein, coconut, babassu oils	$42–$50
Tsubaki Premium Repair Shampoo	Drugstore-friendly maintenance	Camellia oil, moisture-locking formula	$14–$18

1. Shiseido Professional Sleekliner

Smooth, frizz-controlled hair with every wash

This salon-grade shampoo is a favourite for anyone managing rebonded, chemically straightened, or frizz-prone hair in Singapore’s humidity. Formulated with a heat-protectant complex, Shisedo keeps hair sleek, reduces puffiness, and strengthens fragile strands.

• Price: $38–$45
  
• Ideal For: Rebonded and straightened hair
  
• Key Feature: Humidity-resistant + thermal protection

Why We Like It: Many local stylists recommend this post-rebonding, especially during Singapore’s wet season. It also pairs well with flat ironing and blowouts, making it perfect for maintenance in between salon visits.

“Shiseido Sleekliner is one of the most consistent shampoos we see results with,” says a colourist from REDS hair salon JB

2. L'Oréal Serie Expert Pro-Keratin

Strength and softness in one bottle

This L'Oréal formula is ideal for keratin-treated, coloured, or weakened hair. Its Pro-Keratin + Incell complex fills in gaps in the hair’s internal structure, rebuilding damaged areas and sealing the surface for softness and shine.

• Price: $35–$42
  
• Ideal For: Damaged, keratin-treated hair
  
• Key Feature: Internal fibre reconstruction

Why We Like It: For those whose hair feels weak or overly porous after straightening or colouring, this is an easy fix that shows results within a few washes. It’s best used with the matching mask for full effect, especially after bleach-and-tone jobs or smoothing treatments.

3. Milbon Repair Heat Shampoo

Repairs heat-damaged, coloured hair

Milbon’s premium line targets damage at the cellular level. This shampoo uses silk proteins and ceramides to reinforce the cuticle while gently cleansing chemically and thermally damaged hair.

• Price: $48–$58
  
• Ideal For: Bleached or frequently styled hair
  
• Key Feature: Heat-activated ceramide repair

Why We Like It: Popular with stylists who prep clients for frequent hot tool use. It doesn’t just fix damage, it helps prevent it. It's also popular among Singapore salons that service bleached Asian hair and pre-wedding styling clients.

4. Moist Diane Extra Damage Repair

Affordable care without sacrificing results

Moist Diane delivers luxury-level nourishment at a fraction of the cost. Featuring organic argan oil and vegetable-based keratin, this formula is perfect for chemically treated hair on a budget.

• Price: $18–$22
  
• Ideal For: Budget-conscious users with bleached or coloured hair
  
• Key Feature: Sulfate-free + organic keratin

Why We Like It: Despite its drugstore label, this shampoo performs on par with more premium options, making it a popular repeat buy for Singaporeans post-salon treatment.

Tip: For best results, use it alongside the Moist Diane Damage Repair Treatment.

5. Davines NOUNOU Shampoo

Protein-rich recovery for brittle strands

Made in Italy and favoured by eco-conscious salons, NOUNOU uses tomato extract and plant proteins to restore elasticity to overprocessed hair. It’s nourishing without being greasy, making it ideal for regular use.

• Price: $48–$60
  
• Ideal For: Brittle, bleached, or sensitised hair
  
• Key Feature: Nourishment via antioxidant-rich tomato extract

Why We Like It: One of the few shampoos that leaves bleached hair feeling genuinely stronger after every wash, not just coated or softened. This works especially well for those who alternate between bleach, rebonding, and toners throughout the year.

6. Olaplex No.4 Bond Maintenance Shampoo

Industry leader in bond repair

Who doesn’t know Olaplex? It's globally trusted for its patented bond-building technology that targets disulfide bonds, critical for hair integrity after chemical treatments like rebonding, bleaching, or perming. It strengthens the internal structure and restores elasticity.

• Price: $52–$60
  
• Ideal For: All chemically treated hair types
  
• Key Feature: Patented bis-aminopropyl diglycol dimaleate bonding agent

Why We Like It: Recommended by stylists after every major chemical service. A little goes a long way, and it’s safe for daily use, even on coloured or textured hair. 

Tip: Use Olaplex No.5 conditioner for a complete post-treatment repair routine.

7. Kérastase Resistance Bain Thérapiste

Ultimate indulgence for over-processed hair

This is a luxurious, ultra-nourishing shampoo for hair that’s gone through extreme straightening or multiple chemical sessions. Powered by the Fibra-Kap Complex, it reconstructs the fibre layer and seals in smoothness.

• Price: $49–$55
  
• Ideal For: Severely damaged, porous, or elastic hair
  
• Key Feature: Reconstructs keratin-associated proteins

Why We Like It: The jelly-like texture coats hair evenly without heaviness, making it suitable even for fine hair that's been overtreated. A rescue product for post-rebonding fatigue.

“Especially effective when paired with Kérastase Therapiste Masque for intensive rehab.” - Cynthia Wong, hair stylist in Queensway.

8. K18 Peptide Prep pH Maintenance

High-tech care for colour and bleach damage

This minimalist formula from biotech brand K18 focuses on preserving the molecular structure of hair while cleansing. Designed for everyday use, it’s gentle, sulphate-free, and clinically proven to support hair elasticity.

• Price: $46–$54
  
• Ideal For: Colour-treated, bleached, or sensitised hair
  
• Key Feature: pH-balanced, peptide-supported repair

Why We Like It: A top choice for those who cycle between bleach, colour, and rebonding. It preps the hair to absorb treatments more effectively and keeps the cuticle smooth. Great for pre-treatment prep before rebonding or keratin smoothing as it restores pH levels to the hair.

9. Aveda Damage Remedy Restructuring Shampoo

Eco-friendly restoration for dry strands

Made with certified organic quinoa protein, coconut, and babassu oils, this plant-powered shampoo is perfect for dry, coloured, or permed hair that needs extra elasticity and moisture without synthetic buildup.

• Price: $42–$50
  
• Ideal For: Colour-treated, dry, or eco-conscious consumers
  
• Key Feature: Botanical protein blend + zero silicones

Why We Like It: Aveda is salon-grade but rooted in clean beauty. It’s ideal for those seeking performance and sustainability in a single bottle. It’s best for users with high-porosity hair looking to rebalance structure without harsh surfactants.

10. Tsubaki Premium Repair Shampoo

Surprising performance at drugstore price

Tsubaki blends camellia oil with pearl protein and royal jelly to deliver deep hydration and long-lasting softness. Its standout feature is how well it combats frizz even in Singapore’s tropical weather.

• Price: $14–$18
  
• Ideal For: Daily maintenance and budget care
  
• Key Feature: Humidity-blocking lightweight oils

Why We Like It: A reliable daily shampoo that won’t strip chemically processed hair and gives results comparable to more premium salon brands.

Choose The Right Shampoos for Chemically Treated Hair

Choosing the right shampoo can make or break your post-treatment routine. These formulas have advanced to protect not just against damage but also against humidity, colour fade, and texture loss.

At Top Secret, we curate only trusted, salon-grade shampoos that align with the real needs of chemically treated hair. Whether you’re managing bleach recovery, keratin maintenance, or rebonding aftercare, our collection is built for results, not trends.

Explore our curated hair product collection and find the best shampoo for chemical or bleached hair and your hair will thank you.

Frequently Asked Questions About Shampoos for Chemically Treated Hair

What Ingredients Should I Avoid After Rebonding Or Bleaching?

Avoid sulfates, parabens, and drying alcohols. These can strip moisture and worsen damage.

Can I Use Clarifying Shampoo On Chemically Treated Hair?

Not frequently. Once a month is fine, but overuse can lift colour and weaken bonds.

How Often Should I Wash Chemically Treated Hair?

2–3 times a week with nourishing shampoo is ideal. Daily washing can dry out the hair.

Should I Pair My Shampoo With A Matching Conditioner Or Mask?

Yes, ideally. Most products are designed to work best as a system.

Are Drugstore Shampoos Safe For Coloured Or Rebonded Hair?

Some are. Always check the label for sulfate-free and colour-safe claims.

Do I Need Different Shampoos For Keratin And Bleach Treatments?

Not necessarily, but choose formulas that match your hair's moisture and protein needs.