Olaplex Nº.4 Bond Maintenance Shampoo 525 mL — Strengthens Bonds, Hydrating & Color-Safe

Olaplex Nº.4 Bond Maintenance™ Shampoo is a concentrated, bond-strengthening cleanser that repairs everyday damage, reduces breakage, and restores hydration for smoother, shinier, more manageable hair in one wash.

This salon-grade shampoo is formulated to repair and protect hair at the molecular level while delivering a rich, non-stripping lather. Designed for medium-to-coarse textures across straight, wavy, curly, and coily hair, Nº.4 is color-safe, vegan, and dermatologist tested. Use it as the foundation of a bond-maintenance routine to reduce frizz, improve detangling, and defend against future breakage without weighing hair down.

How quickly will I notice reduced breakage and improved strength?

Many users report visible improvements after a single wash when used as directed. The formula targets weakened bonds to reinforce hair structure, which helps reduce split ends and breakage over repeated use.

• Repairs everyday damage in one wash
• Clinically shown to reduce breakage and increase molecular strength
• Supports longer, fuller hair by protecting against further damage

Will this shampoo strip color or dry out chemically treated hair?

No — Nº.4 is color-safe and formulated to cleanse gently while replenishing hydration. Coconut oil–derived surfactants create a luxurious lather that removes buildup without removing essential moisture, making it safe for most chemically treated hair types.

• Color-safe formulation preserves vibrancy
• Hydrating surfactant blend prevents over-drying
• Dermatologist tested and suitable for treated hair

Is this suitable for my hair type: coily, curly, wavy, or straight?

Yes — Olaplex designed Nº.4 for medium-coarse textures and all porosity levels across straight, wavy, curly, and coily hair. It strengthens bonds and smooths the cuticle without adding weight, so it works across diverse styling and texture needs.

• Effective on medium-to-coarse hair textures
• Works with all porosity levels to improve manageability
• Boosts shine and reduces frizz for varied curl patterns

How should I use it for best results and what can I expect when paired with other Olaplex products?

Apply to wet hair, lather gently, and rinse; follow with a compatible Olaplex conditioner or treatment for amplified results. When used as a system (for example with Nº.3 Hair Perfector or Nº.5 Bond Maintenance Conditioner), you’ll see enhanced hydration, easier detangling, and greater protection against future damage.

• Use on wet hair; lather and rinse thoroughly
• Follow with Olaplex conditioner or in-salon treatments for best outcomes
• System use yields clinical improvements in hydration, detangling, and strength

Who is this for? Olaplex Nº.4 Bond Maintenance Shampoo is intended for anyone with medium-to-coarse hair seeking professional-strength repair and protection — whether you have natural, color-treated, chemically processed, or textured hair. It’s a smart choice for people wanting to reduce breakage, improve shine, and maintain hair health without heavy residue. If you prioritize a clinically informed, cruelty-free, and color-safe routine that supports long-term hair resilience, Nº.4 fits seamlessly into daily or weekly care.

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 Alketh-7, Laureth-9, Glycerin, Trideceth-12, C12-13 Alketh-23, C12-13 Alketh-3, Panthenol, Acetic Acid, Hydrolyzed Vegetable Protein PG-Propyl Silanetriol, Pentasodium Triphosphate, Glyoxal, Sodium Hydroxide, Helianthus Annuus (Sunflower) Seed Oil, Disodium EDTA, Tocopherol, Prunus Armeniaca (Apricot) Kernel Oil, Pseudozyma Epicola/Argania Spinosa Kernel Oil Ferment Filtrate, Pseudozyma Epicola/Camellia Sinensis Seed Oil Ferment Extract Filtrate, Quaternium-95, Propanediol, Helianthus Annuus (Sunflower) Seed Extract, PEG-8, Euterpe Oleracea Fruit Extract, Punica Granatum Extract, Rosmarinus Officinalis (Rosemary) Leaf Extract, Musa Sapientum (Banana) Fruit Extract, Origanum Vulgare Leaf Extract, Morinda Citrifolia Fruit Extract, Arctium Lappa Root Extract, PEG-8/SMDI Copolymer, Sodium Hyaluronate, Palmitoyl Myristyl Serinate, Sodium Polyacrylate, Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate, Biotin, Phenoxyethanol, Chlorphenesin, Benzoic Acid, Potassium Sorbate, Sodium Benzoate, Fragrance (Parfum), Hexyl Cinnamal, Limonene, Citral