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Duologi
Sealing Hair Serum
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Description

Sealing Hair Serum is a protective treatment to visibly reduce split ends, smoothing damaged hair fibres to tame flyaways and dry, brittle ends – plus smooth frizzy hair.


Designed to help treat hair at a cellular level and protect the hair cuticle, skincare ingredients target dry and damaged hair from breakage, with Keratin protein, nourishing Oat Lipids and strengthening Betaine.


Visibly reduces split ends*
Smooths & softens the hair*

The silky water-based texture absorbs quickly with no sticky residue, leaving hair softer and protected, with a healthy glossy shine. Encased in a luxe glass bottle made with 25% recycled glass


*Consumer tested

Treat clean hair to this protective serum on wash days. Pump a few drops into the palm of your hand, then warm the hair serum between your hands before smoothing through damp hair, focusing on mid-lengths to ends.

Formulated with hair and scalp-loving actives plus skincare ingredients, to cleanse, moisturise and treat your hair from the roots.


Keratin protein helps strengthen and protect hair from root to tip. Naturally occurring in hair, this transformative protein binds directly to areas of damage and fills them in, helping to revitalise and nourish hair for a smoother, shinier and healthier appearance.

Nourishing Oat Lipids help to protect hair from damage, as ceramides assist in strengthening the hair cuticle by holding it together. Ultra-compatible with both hair and scalp, this multi-benefit, skin-mimicking ingredient aids in moisturising the scalp by delivering three primary lipids to the skin.

Natural Betaine strengthens hair, making it more resistant to breakage and split ends. Derived from beetroot sugar, it binds to damaged areas on the hair fibre – enhancing slip for ease when combing, plus smoothing the hair strands for a shinier, healthier appearance.

Everything you want – and nothing you don’t.

Free from parabens and silicone rinse-offs, our high-performing haircare products are skincare for your hair.


All Ingredients
AQUA, PEG-40 HYDROGENATED CASTOR OIL, C12-13 PARETH-9, TRIDECETH-9, PANTHENOL, HYDROLYZED KERATIN, AVENA SATIVA KERNEL OIL, PEG-5 ETHYLHEXANOATE, ACRYLATES/C10-30 ALKYL ACRYLATE CROSSPOLYMER, PROPANEDIOL, POLYQUATERNIUM-39, SODIUM HYDROXIDE, TRAMETES VERSICOLOR EXTRACT, LEUCONOSTOC/RADISH ROOT FERMENT FILTRATE, PHENOXYETHANOL, PARFUM, DISODIUM EDTA, HEXYL CINNAMAL, CAPRYLHYDROXAMIC ACID, BENZYL SALICYLATE, SODIUM BENZOATE, LINALOOL, LIMONENE, CITRONELLOL, ALPHA-ISOMETHYL IONONE, BENZYL BENZOATE
Transform your hair with DUOLOGI: A customisable hair routine of haircare-skincare hybrids that promote scalp care. Formulated with skincare ingredients to cleanse, moisturise and treat your hair from the roots, DUOLOGI protects and strengthens strands by working directly on the hair fibre, while also maintaining an optimal scalp environment. It’s time to start treating your hair, like your skin.
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Standard delivery on all orders is 5 -7 working days with a standard delivery charge of £4.50/€7.25. 

VIP Customers qualify for free delivery with every order worth £45 or more.

Please contact Customer Care for more delivery information.