Hydrolysed Keratin
Hydrolyzed Keratin
A low-molecular-weight protein fragment that helps support damaged areas of the hair fibre for a smoother, stronger feel.
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keratin intensive repair hair mask
A rich repair mask that nourishes damaged hair, helps restore elasticity and shine, and leaves strands softer, stronger, and easier to manage after rinsing.
Made fresh for you once you order · dispatched within 2 working days.
On the hair and scalp
Restores elasticity and mirror-like shine
Softens brittle strands with rich slip
Leaves damaged hair stronger and more manageable

Why this exists
Inside the formula
Hydrolyzed Keratin
A low-molecular-weight protein fragment that helps support damaged areas of the hair fibre for a smoother, stronger feel.
Hydrolyzed Wheat Protein
Adds complementary protein support at the cuticle surface, helping hair feel more resilient and less brittle.
Butyrospermum Parkii (Shea) Butter
Provides rich emollient nourishment that softens dry lengths and helps reduce the rough feel of damaged ends.
Persea Gratissima (Avocado) Oil
Supplies oleic-acid-rich lipids that help replenish the feel of dryness and improve manageability through the lengths.
Cantharellus Cibarius (Chanterelle) Extract
Creates a polysaccharide-rich base that supports a more comfortable, hydrated treatment environment.
On the hair and scalp
Rich in the hand, but it spreads evenly through wet hair. As it absorbs, it feels noticeably lighter on the strand. After rinsing, hair is left soft with a smoother, more manageable finish.
The application
Use after cleansing, on freshly washed hair that has been gently squeezed free of excess water. Work through the lengths and ends, where dryness and damage are most visible.
Distribute with fingers or a wide-tooth comb so the mask coats each strand without tugging. This helps the formula sit evenly before you rinse.
Allow five to ten minutes of contact time before rinsing thoroughly. This gives the proteins and lipids time to bind and soften the fibre rather than simply coating the surface.
Use whenever hair feels dry, brittle, or difficult to manage. For very compromised lengths, keep it as a regular part of your hair routine.
What to expect
Hair feels softer and more pliable after rinsing. Dry, brittle ends have a noticeably different texture from the first use.
Brushing feels easier and breakage during handling may seem reduced. Lengths begin to look smoother and less frayed at the ends.
With repeated use, hair tends to feel more manageable and look more reflective. The overall feel is richer, less rough, and easier to style.
The deeper detail
The aqueous base is built around Cantharellus Cibarius (Chanterelle) Extract, organically sourced, a polysaccharide-rich ingredient that provides an immediately soothing and hydrating environment for the protein and lipid actives that follow. Sodium PCA and PCA Glyceryl Oleate, both derived from natural pyrrolidone carboxylic acid, are skin-identical humectants that also function in the hair fibre, attracting and retaining moisture in the cortex where flexibility originates.
Guar Hydroxypropyltrimonium Chloride provides the primary conditioning and detangling action, creating the slippage that allows the mask to distribute evenly without pulling. Hydrolyzed Keratin, positioned after the main emulsion components, is a low-molecular-weight fragment sized to penetrate the cuticle and bind to damaged sites within the cortex. Hydrolyzed Wheat Protein reinforces this structural work at the cuticle surface. Together, the two proteins address damage from within and from the outside simultaneously.
Butyrospermum Parkii (Shea) Butter, organically sourced, provides the primary emollient richness of the formula, with a fatty acid profile dominated by stearic and oleic acids that soften and smooth the hair shaft on contact. Persea Gratissima (Avocado) Oil, also organically certified, contributes oleic-acid-rich lipid replenishment. Tocopherol and Ascorbyl Palmitate provide antioxidant protection that slows the progressive oxidative damage that environmental exposure causes between treatments.
A small-batch boutique skincare house, made to order. Every bottle is formulated and filled within two working days of your order, then dispatched from the fulfilment centre closest to you : our European facility for United Kingdom and European Union customers, our United States facility for North American customers. Because every bottle is bottled to order, what arrives at your door is at the peak of its actives : nothing has been sitting against light, heat, or oxygen for months. Two-day production is the price of formulation freshness, and the boutique standard we hold ourselves to.
Cruelty-free. Natural certified (Ecocert COSMOS Natural).
From our community
Less snapping when I brush now.
Love this, my curls looked smoother right away and felt less rough after I rinsed it out. The thick texture spreads easily and gives my hair a softer, healthier feel without weighing it down.
Tangles eased after ten minutes. Hair feels more flexible now. Nice citrus scent too.
I've got fine hair so I was nervous but this didn't weigh it down. Ends feel softer and the cuticle looks flatter once dry. Does what it says really.
Coarse hair feels softer and looks shinier after using this once a week, especially when left on for 10 minutes after shampoo. The scent is a bit strong, but the results are excellent.
Rich texture but feels lighter as it works through. Comb glides, frizz sits down, shine looks healthier.
Bleached hair, dry ends. This made them feel way less wiry after one use. Strands have more structure now and there's a clean sheen rather than grease. Floral citrus scent is gentle. Only thing is the tube doesn't last long at this price, so I'm giving it four stars.
Every OVESSI order is prepared once you place it. Your order is filled, sealed and labelled for you, then dispatched within 2 working days. Nothing waits on a warehouse shelf.
In case you wondered
Pair it with
Small batch. Filled for you. Made in EU and US.