Best for: Medium to coarse hair that needs gentle cleansing, strengthening, hydration, softness, shine and frizz control.

What is OLAPLEX Nº.4 Bond Maintenance™ Strengthening Shampoo?

OLAPLEX Nº.4 Bond Maintenance™ Strengthening Shampoo is a highly concentrated shampoo designed to repair everyday damage while gently cleansing the hair without stripping essential moisture.

The strengthening formula works at a molecular level to strengthen and reinforce bonds for more resilient hair. It replenishes hydration and enhances softness while helping to smooth the hair, reduce frizz and boost shine.

Designed for medium to coarse textures and all porosity levels, it can be used on straight, wavy, curly and coily hair.

The formula is vegan, colour-safe, dermatologist tested and suitable for chemically treated hair.

Who is it best for?

OLAPLEX Nº.4 Bond Maintenance™ Strengthening Shampoo may suit you if your hair:

• has a medium to coarse texture
• is straight, wavy, curly or coily
• has experienced everyday damage
• feels brittle or fragile
• needs greater strength and resilience
• is prone to breakage
• needs additional hydration
• feels dry or lacks softness
• is prone to frizz
• lacks smoothness
• looks dull or needs more shine
• is colour-treated
• is chemically treated
• has low, medium or high porosity
  

What problem does it solve?

OLAPLEX Nº.4 Bond Maintenance™ Strengthening Shampoo combines gentle cleansing with strengthening and hydrating benefits for damaged, medium to coarse hair.

Everyday damage → helps repair everyday damage and defend against future breakage.

Weak or fragile hair → strengthens and reinforces bonds for more resilient hair.

Dryness → replenishes hydration without stripping essential moisture.

Frizz and lack of smoothness → clinically proven to smooth and reduce frizz.

Dull-looking hair → clinically proven to boost shine.

Split ends → clinically proven to help reduce split ends.

This allows the shampoo to cleanse while addressing several signs of everyday hair damage in one wash.

Benefits

• Repairs everyday damage
• Helps defend against future breakage
• Strengthens the hair
• Reinforces bonds
• Helps improve hair resilience
• Gently cleanses without stripping
• Replenishes hydration
• Enhances softness
• Boosts shine
• Smooths the hair
• Helps reduce frizz
• Helps reduce split ends
• Leaves hair feeling soft and lightweight
• Suitable for medium to coarse hair
• Suitable for straight, wavy, curly and coily hair
• Suitable for all porosity levels
  
• Colour-safe
  
• Suitable for chemically treated hair
  
• Vegan
  
• Dermatologist tested
  
• Sulphate-free
  
• Paraben-free
  

Key Ingredients

• Bis-Aminopropyl Diglycol Dimaleate: Included in the strengthening shampoo formula.
• Gentle Blend of Coconut Oil-Derived Surfactants: Provides an easy, abundant lather that leaves the scalp and hair feeling hydrated.
• The formula also contains ingredients including Biotin, Sodium Hyaluronate, Panthenol, Tocopherol, Sunflower Seed Oil, Apricot Kernel Oil, Argan Kernel Oil and Hydrolysed Vegetable Protein.

How to Use

A little goes a long way with this highly concentrated formula.

• Dispense the shampoo and emulsify between your hands.
  
• Apply to wet hair.
  
• Lather thoroughly.
  
• Rinse well.
  
• Follow with OLAPLEX Nº.5 Bond Maintenance™ Strengthening Conditioner or your OLAPLEX mask of choice.

Avoid contact with eyes.

Why Choose OLAPLEX Nº.4 Bond Maintenance™ Strengthening Shampoo?

Hair texture: Medium to coarse
Hair patterns: Straight, wavy, curly & coily
Porosity: All porosity levels
Primary concerns: Everyday damage, weakness, dryness, frizz & dullness
Best for: Strengthening, nourishing & hydrating
Action: Cleanses, repairs, strengthens & reinforces
Hair feel: Soft & lightweight
Finish: Smooth with enhanced shine
Formula: Highly concentrated
Colour-safe: Yes
Chemically treated hair: Suitable
Routine step: Cleanse
Brand: OLAPLEX
Range: Bond Maintenance™
Size: 250ml

Is OLAPLEX Nº.4 Bond Maintenance™ Strengthening Shampoo Right for Me?

Choose this shampoo if: you have medium to coarse hair and want a highly concentrated shampoo that gently cleanses while helping repair everyday damage, strengthen the hair and replenish hydration.

It may also suit you if: your hair is brittle, fragile, frizzy, lacking softness or shine, or has been colour or chemically treated.

Frequently Asked Questions

What does OLAPLEX Nº.4 Bond Maintenance™ Strengthening Shampoo do?

It gently cleanses while repairing everyday damage, strengthening and reinforcing bonds, replenishing hydration and helping improve softness, smoothness and shine.

What hair type is OLAPLEX Nº.4 Bond Maintenance™ Strengthening Shampoo best for?

The current OLAPLEX formula is designed for medium to coarse textures. It is suitable for straight, wavy, curly and coily hair and all porosity levels.

Does OLAPLEX Nº.4 help damaged hair?

Yes. OLAPLEX states that the shampoo repairs everyday damage and helps defend against future breakage while strengthening and reinforcing bonds for more resilient hair.

Does OLAPLEX Nº.4 help with frizz?

Yes. OLAPLEX states that the shampoo is clinically proven to smooth the hair and reduce frizz.

Will OLAPLEX Nº.4 strip moisture from my hair?

The shampoo is designed to gently cleanse without stripping. Its nourishing formula replenishes hydration while retaining essential moisture.

Is OLAPLEX Nº.4 suitable for colour-treated hair?

Yes. OLAPLEX identifies Nº.4 Bond Maintenance™ Strengthening Shampoo as colour-safe and suitable for chemically treated hair.

Is OLAPLEX Nº.4 sulphate-free?

Yes. OLAPLEX states that the formula is made without sulphates and SLS/SLES. It is also formulated without phthalates, MIC/MIT and parabens.

Does OLAPLEX Nº.4 add shine?

Yes. OLAPLEX states that Nº.4 is clinically proven to boost shine while also smoothing the hair and reducing frizz.

What conditioner should I use after OLAPLEX Nº.4 Shampoo?

OLAPLEX recommends following Nº.4 with Nº.5 Bond Maintenance™ Strengthening Conditioner or an OLAPLEX mask of your choice.

Ingredients

Aqua (Water, Eau), Sodium Lauroyl Methyl Isethionate, Cocamidopropyl Hydroxysultaine, Potassium Cocoyl Glycinate, Disodium Cocoyl Glutamate, Potassium Cocoate, Sodium Lauroyl Sarcosinate, Sodium Methyl Isethionate, Glycereth-26, Decyl Glucoside, Bis-Aminopropyl Diglycol Dimaleate, Biotin, Sodium Hyaluronate, Panthenol, Tocopherol, Euterpe Oleracea Fruit Extract, Musa Sapientum (Banana) Fruit Extract, Arctium Lappa Root Extract, Punica Granatum Bark/Fruit Extract, Rosmarinus Officinalis (Rosemary) Leaf Extract, Camellia Sinensis Leaf Extract, Morinda Citrifolia Fruit Extract, Origanum Vulgare Leaf Extract, Helianthus Annuus (Sunflower) Seed Oil, Prunus Armeniaca (Apricot) Kernel Oil, Argania Spinosa Kernel Oil, Helianthus Annuus (Sunflower) Seed Extract, Hydrolyzed Vegetable Protein PG-Propyl Silanetriol, Palmitoyl Myristyl Serinate, Polyquaternium-10, Polyquaternium-11, Guar Hydroxypropyltrimonium Chloride, Caprylyl Glycol, Amodimethicone, Divinyldimethicone/Dimethicone Copolymer, Sodium Cocoyl Glutamate, Glycol Distearate, Methyl Gluceth-20, Acrylates Copolymer, PEG-120 Methyl Glucose Dioleate, Cocamidopropylamine Oxide, Disodium Laureth Sulfosuccinate, Ethylhexylglycerin, Sodium Lauryl Sulfoacetate, C11-15 Alketh-7, Laureth-9, Trideceth-12, Glycerin, Laureth-10, C12-13 Alketh-23, C12-13 Alketh-3, Quaternium-95, Propanediol, PEG-8, PEG-8/SMDI Copolymer, Lauric Acid, Sodium Laurate, Sodium Polyacrylate, Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate, Trisodium Ethylenediamine Disuccinate, Sodium Sulfate, Acetic Acid, Benzoic Acid, Sodium Benzoate, Citric Acid, Potassium Sorbate, Sodium Hydroxide, Phenoxyethanol, Chlorphenesin, Sodium Chloride, Parfum (Fragrance), Citral, Citrus Aurantium Peel Oil, Hexyl Cinnamal, Limonene, Menthol, CI 19140 (Yellow 5), CI 15985 (Yellow 6).

Ingredients are subject to change. Please consult the product packaging for the most current ingredient list.

Safety Information

Avoid contact with eyes.