Is this leave-in suitable for dry, damaged or color-treated hair?

Yes, its combination of Murumuru seed butter, Argan oil, Squalane, Panthenol and Sodium Hyaluronate provides intensive moisture and bond repair, making it ideal for dry, chemically treated or brittle hair, though very sensitive scalps should watch for the added fragrance.

What is the role of Bis-Aminopropyl Diglycol Dimaleate in Oplaplex Leave In - Numero 5?

Bis-Aminopropyl Diglycol Dimaleate is the patented cross-linking agent that reconnects broken disulfide bonds in the hair keratin structure, helping to restore strength, elasticity and reduce breakage.

Can this product be layered with other styling or treatment products, and does it contain any controversial ingredients?

The leave-in can be applied after shampoo and before styling and can be followed by heat protectants, serums or hairspray without adverse interactions; it does contain fragrance (including limonene and linalool) and phenoxyethanol, which some users consider controversial, but it is free of sulfates, parabens and known major irritants.

OPLAPLEX • 100 ml

Leave In - Numéro 5

Hair

Product Insights

Leave In - Numero 5 by Oplaplex is a 100 ml hair leave-in treatment formulated with conditioning agents such as Cetearyl Alcohol, Behentrimonium Chloride, and a blend of nourishing oils including Murumuru seed butter, Argan oil and Squalane, plus reparative actives like Bis-Aminopropyl Diglycol Dimaleate, Panthenol and Sodium Hyaluronate. The rich emollient base aims to smooth, strengthen and add shine to dry or damaged hair, while the inclusion of fragrance components (limonene, linalool) and phenoxyethanol may pose irritation risks for very sensitive scalps. Overall, the product delivers a high level of moisture and bond-repair benefits without sulfates or parabens, positioning it as a premium restorative leave-in for normal to dry hair types.

Comparative Analysis

Positioned as a high-performance, bond-repair leave-in within the premium hair-care segment, Leave In - Numero 5 differentiates itself by combining Oplaplex's patented cross-linking technology with a rich botanical oil blend and hyaluronic acid for deep moisture and shine.

Ingredients

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.

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