Olaplex Nº.4 Bond Maintenance Shampoo 250 mL — Reduces Breakage, Hydrating & Color-Safe

Olaplex Nº.4 Bond Maintenance Shampoo is a concentrated, bond-building shampoo that cleanses while reducing breakage and restoring moisture and manageability in a single wash.

Formulated with Olaplex’s patented bond-building chemistry and a gentle coconut-derived surfactant blend, Nº.4 is designed to rebuild internal hair strength while preserving moisture and color. It produces a rich, nourishing lather that lifts dirt and product without stripping, leaving hair smoother, shinier, and easier to detangle. This shampoo is suitable for coily, curly, wavy, and straight hair, and works well as part of a system with other Olaplex products for even greater reduction in breakage.

How does Nº.4 reduce breakage and improve hair strength?

Nº.4 contains Olaplex’s bond-building ingredient that targets weakened disulfide bonds inside the hair shaft, helping to reinforce structure from within. Combined with conditioning agents like hydrolyzed proteins and panthenol, the formula reduces friction and mechanical damage while improving elasticity.

• Bond-building chemistry supports internal hair structure.
• Protein and humectants improve resilience and flexibility.
• Detangling polymers reduce mechanical stress during combing.

Will this shampoo strip color or leave hair dry?

No — Nº.4 is formulated to be color-safe and hydrating. Instead of strong sulfate stripping, it uses milder coconut-derived surfactants and moisturizing ingredients like glycerin, sunflower seed oil, and sodium hyaluronate to clean while replenishing moisture.

• Color-safe surfactant system for less fading.
• Moisturizers help retain hydration and shine.
• Designed to avoid the dry, squeaky feeling of harsh shampoos.

How should I use Olaplex Nº.4 for best results?

Apply to wet hair, lather, and rinse; repeat if desired for a deeper clean. For optimal repair and breakage reduction, pair with Nº.3 Hair Perfector and Nº.5 Conditioner as a system, then style as usual.

• Wet hair thoroughly, apply a quarter-sized amount and emulsify.
• Leave briefly on the scalp and lengths for mild conditioning before rinsing.
• Follow with a leave-in or Nº.5 Conditioner for enhanced smoothness.

What visible differences can I expect after regular use?

Regular use improves manageability, shine, and detangling, and—when used as part of the recommended Olaplex routine—can deliver clinically measured reductions in breakage. Hair typically feels smoother with reduced friction and fewer knots after washing.

• Smoother texture and increased shine after one wash.
• Better detangling and less mechanical breakage over time.
• Complimentary results when paired with Nº.3 and Nº.5.

Who this product is for: Olaplex Nº.4 Bond Maintenance Shampoo is a good fit for anyone looking to strengthen hair that experiences everyday damage from styling, brushing, chemical services, or environmental stress. It’s formulated for all hair types—fine to coarse, straight to tightly coiled—and is especially useful for people who want a color-safe, hydrating cleanser that improves manageability and reduces breakage when used regularly or as part of the Olaplex system.

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