Olaplex Nº.4 Bond Maintenance Shampoo — 1000 mL Strengthening, Breakage-Reducing, Color-Safe Hydration

Olaplex Nº.4 Bond Maintenance Shampoo is a concentrated, color-safe shampoo formulated to reduce breakage, hydrate hair, and leave strands smoother and easier to detangle with each wash.

Designed to work on coily, curly, straight, and wavy hair, this sulfate-free formula cleanses without stripping natural moisture and supports stronger, more manageable hair over time. Use it alone or as part of the Olaplex system to reinforce the hair’s appearance and improve handling between salon visits.

How does this shampoo actually reduce breakage?

Nº.4 is formulated to gently cleanse while protecting and smoothing the hair surface, which helps lower mechanical stress during brushing and styling. When combined with other Olaplex products, clinical testing shows substantial improvements in breakage reduction and manageability.

• Concentrated formula delivers active ingredients without over-washing.
• Coconut oil–derived surfactants produce a creamy lather that cleans without drying.
• Compatible with color-treated hair to avoid extra fading-related damage.

Will it work on my hair type—curly, coily, or fine?

Nº.4 is formulated for all textures: from fine straight strands to thick coils. It hydrates and smooths while keeping movement and bounce, so it helps detangle curls without weighing them down when used correctly.

• Fine hair: use a smaller amount to avoid heaviness.
• Curly/coily hair: follow with a moisturizing conditioner for best slip and definition.
• Color-treated: safe for preserving tone and shine.

How should I incorporate Nº.4 into my routine for best results?

For optimal results, shampoo twice if your scalp is oily—first to clear buildup, second to treat the lengths. Pairing Nº.4 with Olaplex Nº.3 and Nº.5 increases conditioning, detangling, and the clinically observed reduction in breakage.

• Wet hair thoroughly, apply a quarter-sized amount to scalp and lengths, lather, and rinse.
• Use 1–3 times weekly or as needed; follow with a conditioner or mask.
• Combine with Nº.3 and Nº.5 for system benefits shown in studies.

Is the formula gentle and safe for color-treated hair?

Yes—the sulfate-free, color-safe formulation is designed to clean hair while maintaining moisture and minimizing color fade caused by harsh detergents. It provides a balance of cleansing and conditioning that helps keep color looking vibrant and hair feeling healthy.

• Sulfate-free surfactants help reduce stripping of dye molecules.
• Leaves hair smooth and glossy, improving visual color depth.
• Can be used regularly without aggressive drying effects.

Who is this for: Olaplex Nº.4 Bond Maintenance Shampoo suits anyone seeking a reliable, professional-strength shampoo that reduces breakage and improves manageability—especially those with color-treated or chemically processed hair. It’s a good pick for people wanting gentler daily cleansing, those aiming to reduce styling damage, and anyone who prefers sulfate-free options that still lather and condition effectively.

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