Olaplex Nº.4 FINE Bond Maintenance Shampoo — 250 mL Lightweight Volumizing, Strengthens & Repairs Fine Hair

Olaplex Nº.4 FINE Bond Maintenance Shampoo is a lightweight, volume-boosting cleanser that gently removes buildup while strengthening and repairing fine hair for lasting body without weighing strands down.

Olaplex Nº.4 FINE is formulated specifically for fine hair textures that need lift, resilience and moisture without heaviness. Using a blend of flexible polymers, low-molecular-weight hyaluronic acid and Olaplex’s bond-building technology, this shampoo cleanses hair, supports reduced breakage and helps maintain visible volume when used as part of the Nº.4FINE + Nº.5FINE system. The formula targets root lift and lightweight hydration so hair feels soft, bouncy and manageable after rinsing.

How does Nº.4 FINE add volume without making hair stiff?

Nº.4 FINE employs flexible polymers that create root lift and body while leaving the hair flexible to the touch. The low-molecular-weight hyaluronic acid hydrates from within strands, avoiding heavy residue that flattens fine hair.

• Flexible polymers for lift at the root and natural movement
• Lightweight hydration that won’t weigh down thin strands
• Formulated to rinse clean and leave no stiff buildup

Will this shampoo help strengthen and repair fragile or damaged fine hair?

The bond-maintenance technology in the Olaplex system helps protect and rebuild hair’s internal strength while reducing visible breakage. When paired with Nº.5 FINE conditioner, the regimen supports repair and ongoing protection from styling and environmental stressors.

• Designed to reduce breakage compared with untreated hair
• Supports repair by addressing internal bond integrity
• Works best as part of the Nº.4FINE + Nº.5FINE routine for optimal results

Is this shampoo suitable for all fine hair types—straight, wavy, curly, or coily?

Nº.4 FINE is safe and effective on a wide range of fine textures, from straight to coily. Its lightweight formula cleans and lifts without stripping natural oils, making it a versatile choice for fine hair that needs volume across curl patterns.

• Gentle cleansing for color-treated and textured fine hair
• Preserves natural moisture balance to prevent frizz or dryness
• Helps detangle and smooth while supporting bounce and body

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

Massage into wet hair focusing on the scalp and roots, then rinse thoroughly. Follow with Nº.5 FINE Bond Maintenance Conditioner to maximize volume, manageability and bond repair benefits.

• Apply to wet hair, massage gently at the scalp, then rinse
• Use in combination with Nº.5 FINE for clinically tested benefits
• Can be used as part of a regular cleansing routine for fine hair

Who is this for? Olaplex Nº.4 FINE Bond Maintenance Shampoo is aimed at anyone with fine or thinning hair who wants visible lift, lightweight hydration and improved strand strength without stiffness or residue. It’s especially useful for people who color or chemically treat fine hair and seek a non-stripping cleanser that supports repair and day-long volume when used with the complementary Olaplex Nº.5 FINE conditioner.

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)."