Olaplex Nº.4 Bond Maintenance Shampoo 250 mL — Reduces Breakage, Hydrates & Smooths

This shampoo blends Olaplex’s patented bond-building chemistry with a gentle, coconut-derived surfactant system to cleanse without stripping natural moisture. Designed to restore internal hair strength and improve texture, Nº.4 works on coily, curly, wavy and straight hair types, leaving strands easier to detangle and more manageable after a single use. The formulation targets everyday damage from brushing, heat and styling, and pairs with other Olaplex products for amplified results.

How does Nº.4 reduce breakage and strengthen strands?

Nº.4 contains Olaplex’s proprietary bond-building ingredient that helps reconnect and reinforce weakened hair structure while the shampoo gently removes dirt and buildup. Reinforced bonds mean hair resists snapping when wet or when being styled, and the formula also deposits conditioning agents that smooth the cuticle for immediate manageability.

• Patented bond-building chemistry supports internal hair strength.
• Conditioning polymers and panthenol improve slip to reduce tugging.
• Sunflower seed oil and humectants help maintain moisture balance.

Will this shampoo work on colored or textured hair?

Yes — Nº.4 is color-safe and formulated to be suitable for all textures, from fine straight to tight coils. It cleanses effectively while safeguarding color and reinforcing strands so processed hair looks smoother and retains vibrancy longer.

• Safe for use on dyed, highlighted and chemically treated hair.
• Rich lather from mild surfactants that don’t strip pigments.
• Suitable for medium-coarse hair types but benefits a range of textures.

How should I use Nº.4 to get the best results?

Apply a small amount to wet hair, lather, and concentrate on the scalp and roots, then rinse thoroughly; repeat if needed. For a complete repair routine, follow with Olaplex Nº.5 Bond Maintenance Conditioner and consider Nº.3 as an at-home treatment to boost the system’s measurable benefits.

• Massage into wet hair and scalp, then rinse completely.
• Use regularly to maintain improved texture and reduced breakage.
• Combine with Nº.3 and Nº.5 for clinically measured improvements.

What results can I expect after starting this shampoo?

Users typically notice improved smoothness, easier detangling and enhanced shine after a few washes. When used as part of the Olaplex Nº.3–5 system, clinical testing shows significant reductions in breakage and better conditioned-looking hair.

• Smoother hair surface and increased slip for brushing and styling.
• Improved manageability and visible shine after regular use.
• Supports long-term strength when combined with other Olaplex products.

Who is this for: Olaplex Nº.4 is aimed at anyone who wants to strengthen fragile, damaged or dry hair while keeping color intact — from clients who visit salons regularly to people doing heat styling at home. It is especially useful for those seeking a daily or frequent-use shampoo that prioritizes bond repair and moisture retention without heavy buildup.

Ingredients

Water (Aqua/Eau), Sodium Lauroyl Methyl Isethionate, Cocamidopropyl Hydroxysultaine, Potassium Cocoyl Glycinate, Disodium Cocoyl Glutamate, Sodium Lauroyl Sarcosinate, Potassium Cocoate, Decyl Glucoside, Glycereth-26, Bis-aminopropyl Diglycol Dimaleate, Cocamidopropylamine Oxide, Disodium Laureth Sulfosuccinate, Glycol Distearate, Sodium Cocoyl Glutamate, Methyl Gluceth-20, Acrylates Copolymer, Peg-120 Methyl Glucose Dioleate, Amodimethicone, Citric Acid, Sodium Lauryl Sulfoacetate, Polyquaternium-10, Ethylhexylglycerin, Divinyldimethicone/Dimethicone Copolymer, Polyquaternium-11, Trisodium Ethylenediamine Disuccinate, Guar Hydroxypropyltrimonium Chloride, C11-15 Pareth-7, Laureth-9, Glycerin, Trideceth-12, C12-13 Pareth-23, C12-13 Pareth-3, Hydrolyzed Vegetable Protein, Pg-propyl Silanetriol, Panthenol, Acetic Acid, Tetrasodium Edta, Pentasodium Triphosphate, Sodium Hydroxide, Disodium Edta, Helianthus Annus (Sunflower) Seed Oil, Tocopherol, Prunus Armeniaca (Apricot) Kernel Oil, Pseudozyma Epicola/Camellia Sinensis Seed Oil Ferment Extract Filtrate, Pseudozyma Epicola/Argania Spinosa Kernel Oil Ferment Filtrate, Quaternium-95, Propanediol, Helianthus Annus (Sunflower) Seed Extract, Peg-8, Euterpe Oleracea Fruit Extract, Punica Granatum Extract, Rosemarinus Officinalis (Rosemary) Leaf Extract, Musa Sapientum (Banana) Fruit Extract, Origanum Vulgare Lear Extract, Morinda Citrifolia Fruit Extract, Articum Lappa Root Extract, Peg-8/Smdi Copolymer, Sodium Hyaluronate, Palmitoyl Myristyl Serinate, Sodium Polyacrylate, Pentaerythrityl Tetra-di-t-butyl Hydroxyhydrocinnamate, Biotin, Benzoic Acid, Phenoxyethanol, Chlorphenesin, Potassium Sorbate, Sodium Benzoate, Fragrance(Parfum), Citral, Hexyl Cinnamal, Limonene