Olaplex Nº.4 FINE Bond Maintenance Shampoo — 100 mL Lightweight Volumizing, Bond-Repairing for Fine Hair

Olaplex Nº.4 FINE Bond Maintenance Shampoo is an ultra-light formula that gently cleanses fine hair while repairing bonds and adding lasting volume without weighing strands down.

This lightweight volumizing shampoo is engineered for fine and fragile hair that needs lift plus restorative care. Unlike heavy cleansers or thickening products that can leave limp residue, Nº.4 FINE targets buildup while supporting hair structure with bond-repairing actives. Clinical testing alongside the No.5FINE conditioner shows improved strength and reduced breakage when used as a system, making it a practical choice for those who want fuller-looking, healthier-feeling hair from wash to finish.

How does this shampoo increase volume without drying hair out?

Nº.4 FINE uses low-weight polymers and a hydra-balancing complex to lift at the root while keeping mid-lengths and ends hydrated. The formula avoids heavy silicones that can flatten fine strands, delivering a bouncy finish that still feels soft to the touch. You get visible body plus manageable texture after rinse and styling.

• Flexible polymers create root lift and all-day volume
• Hydra-Balancing Matrix cleanses without over-conditioning
• Low Molecular Weight Hyaluronic Acid adds lightweight moisture

Will this shampoo help repair damaged or brittle fine hair?

Yes — the product contains bond-supporting ingredients designed to strengthen compromised hair fiber as it cleanses. In controlled tests, the system reduced breakage and improved tensile strength when paired with the matching conditioner. It works best as part of Olaplex’s Bond Maintenance routine but still provides benefits when used alone.

• Formulated to rebuild and support hair bonds during washing
• Clinically proven reductions in breakage when used with No.5FINE*
• Lightweight conditioning that detangles and smooths fragile strands

How should I use Nº.4 FINE to get maximum results?

Apply a small amount to wet hair, focusing on the scalp to remove oil and product residue, then massage and rinse thoroughly. For best performance, follow with No.5FINE Bond Maintenance Conditioner to lock in repair and volume. Adjust the quantity by hair length and oiliness; fine hair typically needs less product than thicker textures.

• Use on wet hair, concentrate at the roots, work into a light lather
• Rinse fully and follow with No.5FINE for optimal repair
• Suitable for daily or frequent cleansing depending on scalp needs

Is this safe for colored, chemically treated, or textured hair?

Nº.4 FINE is formulated to be gentle on color-treated and chemically processed hair while addressing the needs of fine textures. It’s free from heavy weighting agents that can dull color or collapse wave and curl patterns, and its bond-supporting ingredients help protect hair subjected to salon services. Always patch-test new products if you have specific sensitivities.

• Designed to complement color and salon treatments without stripping
• Works on straight, wavy, curly, and coily fine hair types
• Light formula preserves texture while providing repair and body

Who is this for? If your hair is fine or thin and you want visible lift, improved resilience, and a soft, non-greasy feel, Olaplex Nº.4 FINE Bond Maintenance Shampoo is formulated for you. It suits anyone seeking a lightweight, science-backed cleanse that supports hair structure—especially those who regularly color, heat-style, or notice breakage. Pair with No.5FINE for a complete bond-maintenance routine that targets both volume and strength.

Ingredients

Aqua/Water/Eau, Sodium Cocoyl Alaninate, Sodium Cocoyl Isethionate, Coco-Glucoside, Lauryl Glucoside, Propanediol, Cocamidopropyl Hydroxysultaine, Glycerin, Acrylates Copolymer, Polyquaternium-80, Bis-Aminopropyl Diglycol Dimaleate, Phenoxyethanol, Sodium Chloride, Parfum/Fragrance, Coconut Acid, Cocamide MIPA, Guar Hydroxypropyltrimonium Chloride, Polyglyceryl-4 Caprate, Polyglyceryl-6 Caprylate, Polyimide-1, Chlorphenesin, Panthenol, Xanthan Gum, Polyquaternium-7, Cetrimonium Chloride, Ethylhexylglycerin, Oryza Sativa (Rice) Bran Extract, Hydrolyzed Quinoa, Trisodium Ethylenediamine Disuccinate, Sarcosine, Pisum Sativum (Pea) Seed Extract, Helianthus Annuus (Sunflower) Extract, Propylene Glycol, Sclerotium Gum, 1,2-Hexanediol, Rosmarinus Officinalis (Rosemary) Leaf Extract, Tocopherol, Sodium Hydroxide, Algin, Sodium Hyaluronate, Sodium Benzoate, Benzyl Alcohol, Tetrasodium Glutamate Diacetate, Potassium Sorbate, Caesalpinia Spinosa Fruit Extract, Helianthus Annuus (Sunflower) Sprout Extract, Citric Acid, Hexyl Cinnamal, Limonene, Citral, Yellow 5 (CI 19140) , Yellow 6 (CI 15985).