Olaplex Nº.5 Leave-In Conditioner 100 mL — Lightweight Repair & Heat Protection to 450°F for Split Ends and Frizz Control

Olaplex Nº.5 Leave-In Conditioner is a lightweight gel-cream that instantly hydrates, mends split ends, reduces breakage and shields hair from heat up to 450°F/232°C.

Designed to restore moisture and strengthen strands from the cortex to the cuticle, Nº.5 combines reparative technology with a soft, non-greasy finish. The texture detangles and smooths while resisting humidity for prolonged frizz control. It works on coily, curly, wavy and straight hair types, and the concentrated formula means a little goes a long way.

How does Nº.5 repair damaged hair and split ends?

Nº.5 uses bond-building ingredients to reinforce weakened areas of the hair fiber, helping to continuously mend damage over time. Its gel-cream base coats mid-lengths and ends to seal rough cuticles, making split ends appear smoother and reducing further breakage during styling.

• Targets cortex-to-cuticle to strengthen internal structure
• Seals and smooths ends to minimize visible splits
• Reduces breakage during brushing and styling

Will it weigh down fine hair or leave residue?

The formula is concentrated but lightweight, designed to add moisture without heaviness. Applied sparingly to damp hair, it delivers softness and manageability while preserving natural movement and volume.

• Gel-cream texture absorbs quickly without greasiness
• Suitable for fine to thick hair when used in small amounts
• Leaves hair touchable and easy to style

How much heat protection and frizz control does it provide?

Nº.5 offers thermal protection up to 450°F/232°C and clinically proven humidity resistance for up to 72 hours. That combination helps reduce heat-related damage during blow-drying or styling tools while keeping frizz under control in humid conditions.

• Protects from heat up to 450°F/232°C
• Clinically shown up to 72 hours of frizz and humidity control
• Improves styling outcomes like smoother blow-dries and defined air-dried looks

How should I use Nº.5 for the best result?

Apply to clean, damp hair focusing on mid-lengths and ends; a small amount is usually enough. Leave in to absorb and style as usual — the product is designed for leave-in use to provide ongoing hydration and repair throughout the day.

• Work a small pump through damp hair, concentrating on ends
• Can be used prior to heat styling for added protection
• Use sparingly on fine hair; apply more freely on thicker textures

Who is this for: Olaplex Nº.5 Leave-In Conditioner is made for people seeking a multi-tasking, reparative leave-in: those with dry, chemically treated, heat-styled or frizz-prone hair who want smoother texture, split-end sealing and heat protection. It suits all curl patterns and straight hair when applied correctly, and the concentrated 100 mL size offers many applications for targeted maintenance.

Ingredients

INGREDIENTS / INGRÉDIENTS: Water/Aqua/Eau, Cetearyl Alcohol, Astrocaryum Murumuru Seed Butter, Propanediol, Behentrimonium Chloride, Glycerin, Cetyl Alcohol, Isoamyl Laurate, Squalane, Bis-Aminopropyl Diglycol Dimaleate, Brassicyl Valinate Esylate, Cetyl Esters, Pentylene Glycol, Phenethyl Benzoate, Brassica Campestris/Aleurites Fordi Oil Copolymer, Hydroxypropyl Guar Hydroxypropyltrimonium Chloride, Caprylic/Capric Triglyceride, Cetrimonium Chloride, Caesalpinia Spinosa Gum, Fructooligosaccharides, Beta Vulgaris (Beet) Root Extract, Sodium PCA, Hydroxypropyl Starch Phosphate, Guar Hydroxypropyltrimonium Chloride, Sodium Lactate, Hydrogenated Ethylhexyl Olivate, Calcium Gluconate, Argania Spinosa Kernel Oil, Caprylyl Glycol, Cocos Nucifera (Coconut) Oil, Panthenol, Arginine, Ethylhexylglycerin, Oryza Sativa (Rice) Bran Extract, Sodium Phytate, Aspartic Acid, Potassium Lactate, Ximenia Americana Seed Oil, PCA, Hydrogenated Olive Oil Unsaponifiables, Butylene Glycol, Lactic Acid, Raphanus Sativus (Radish) Seed Extract, Octyldodecyl Oleate, Octyldodecanol, Helianthus Annuus (Sunflower) Extract, Propylene Glycol, Glycine, Citric Acid, Alanine, Algin, Coco-Glucoside, Sorbitan Oleate, Serine, Tocopherol, Rosmarinus Officinalis (Rosemary) Leaf Extract, Valine, Carrageenan, Chitosan, Xanthan Gum, Isoleucine, Proline, Threonine, Histidine, Phenylalanine, Magnolia Officinalis Bark Extract, Betula Alba Bark Extract, Crambe Maritima Extract, Ulmus Fulva Bark Extract, Caesalpinia Spinosa Fruit Extract, Sodium Hyaluronate, Hydrolyzed Ceratonia Siliqua Seed Extract, Zea Mays (Corn) Starch, Helianthus Annuus (Sunflower) Sprout Extract, Polyquaternium-7, Sodium Hydroxide, Phenoxyethanol, Sodium Benzoate, Potassium Sorbate, Fragrance (Parfum), Hexyl Cinnamal, Limonene, Citral, Linalool, Citronellol