COSRX
5 PDRN Hyaluronic Acid Vital Hydrating Hydrogel Mask$4.70MEDIHEAL
Hyaluronate Bio Seconderm Mask Deep Moisturizing (Ampoule 4ml + Mask 23ml) X 10ea
MEDIHEAL Hyaluronate Bio Seconderm Mask Deep Moisturizing (Ampoule 4ml + Mask 23ml) X 10ea is a sheet mask that names Sodium Hyaluronate on its own ingredient panel, sourced as the Korean-market formula.
No reviews yet10 ea
- Korean-market formula
- Ships from California or direct from Korea
- Korean barcode and batch code intact
- Suited to
- Normal skinDry or dehydrated skinCombination skin
- Helps with
- An occasional, concentrated sheet mask stepA layered Korean routine
In stock. Arrives in 3 to 7 business days
We accept
You’re $100.00 away from free US shipping.
- 30-day returns
- Free US shipping on orders of $100 or more
- Tracked delivery to your door
How it works
Sodium Hyaluronate is named on the ingredient panel on this sheet mask. Sodium Hyaluronate is the salt of hyaluronic acid, and it is what most products labelled hyaluronic actually contain. The salt dissolves more readily and the molecule is smaller, so it sits in the outer layer of skin rather than only on top of it. On this panel it sits alongside Biosaccharide Gum-1, Tocopherol and Salix Alba (willow) Bark Extract. Biosaccharide Gum-1 is a fermentation-derived sugar polymer that binds to skin and holds a moisture film in place. It gives a silky, non-tacky feel.
Key benefits
- Sodium Hyaluronate named on this product's own ingredient panel
- Biosaccharide Gum-1 on the same panel, the formula's polysaccharide
- Tocopherol on the same panel, the formula's antioxidant
- 10 ea to a unit
- Korean GS1 barcode matched against a Korea sourcing supplier's record for this item
How to use
- Unfold the sheet and smooth it onto a cleansed face, adjusting it around the eyes, nose and mouth. Leave it on for 15 to 20 minutes, then remove and pat any remaining essence into the skin rather than rinsing it off.
How is this sheet mask used in a routine?
Unfold the sheet and smooth it onto a cleansed face, adjusting it around the eyes, nose and mouth. Leave it on for 15 to 20 minutes, then remove and pat any remaining essence into the skin rather than rinsing it off. It works as an occasional, concentrated step layered over a completed routine, not a daily one.
Is this the same formula sold in Korea?
Yes. MEDIHEAL's Hyaluronate Bio Seconderm Mask Deep Moisturizing (Ampoule 4ml + Mask 23ml) X 10ea is sold here as the Korean-market formula, the same version carried in Korea, with intact Korean-market packaging and batch coding, not a US-shelf reformulation.
Who is this sheet mask suited for?
Normal skin, Dry or dehydrated skin are the best fit for this sheet mask. Patch test on the inner arm before first full use, as with any new skincare product.
Not on the ingredient list below: fragrance or parfum, denatured or SD alcohol, silicones, parabens, sulfate surfactants, mineral oil or petrolatum and added color.
Full INCI (41): Water, Butylene Glycol, 1,2-Hexanediol, Isopentyldiol, Glycerin, Sodium Polyacrylate, Xanthan Gum, Polyglyceryl-10 Laurate, Sodium Hyaluronate, Ethylhexylglycerin, Disodium EDTA, Citrus Aurantium Bergamia (bergamot) Fruit Oil, Panthenol, Biosaccharide Gum-1, Ectoin, Tocopherol, Salix Alba (willow) Bark Extract, Limonene, Linalool, Water, Butylene Glycol, Isopentyldiol, Glycerin, 1,2-Hexanediol, Trehalose, Sodium Polyacrylate, Pullulan, Polyglyceryl-10 Myristate, Sodium Hyaluronate, Arginine, Carbomer, Ethylhexylglycerin, Disodium EDTA, Glyceryl Acrylate/Acrylic Acid Copolymer, Biosaccharide Gum-1, Pvm/Ma Copolymer, Pelargonium Graveolens Flower Oil, Salix Alba (willow) Bark Extract, Panthenol, Ectoin, Tocopherol
Ingredient list read from medihealshop.com on 30 August 2026.
27 of 41 explained
- Water solvent
- Water is the base almost every serum, toner and cream is built on. It dissolves the water-loving ingredients and sets how light the finished texture feels. On an INCI list it is usually first, which only means it is the largest single ingredient by weight.
- Butylene Glycol humectant
- Butylene Glycol is a small glycol that does two jobs at once: it holds water in the top layer of skin and it dissolves plant extracts and actives that plain water cannot. It also thins a formula, which is why watery Korean essences lean on it.
- 1,2-Hexanediol humectant
- 1,2-Hexanediol is a glycol used for two reasons: it holds water like glycerin, and it makes a formula harder for microbes to live in, so less traditional preservative is needed. Korean formulas use it heavily for that second reason.
- Isopentyldiol solvent
- Isopentyldiol is a glycol used as a light solvent and humectant. It thins a formula, keeps extracts dissolved and leaves a dry finish.
- Glycerin humectant
- Glycerin is the most used humectant in skincare. It draws water into the outer layer of skin and holds it there, and it is one of the very few ingredients whose hydrating effect is settled science rather than marketing. Higher amounts feel tacky, which is why it is usually blended.
- Sodium Polyacrylate thickener
- Sodium Polyacrylate is a polymer that absorbs many times its weight in water. It thickens a formula and holds water in a gel against the skin.
- Xanthan Gum thickener
- Xanthan Gum is a polysaccharide made by fermenting sugar. It thickens a watery formula into a gel and holds the whole thing in suspension so nothing separates. Too much of it and a serum turns stringy, which is why it appears in fractions of a percent.
- Polyglyceryl-10 Laurate emulsifier
- Polyglyceryl-10 Laurate is a sugar-derived emulsifier and solubiliser, mild enough to be a standard choice in Korean essences. It dissolves small amounts of oil into water without any tightening feel.
- Sodium Hyaluronate humectant
- Sodium Hyaluronate is the salt of hyaluronic acid, and it is what most products labelled hyaluronic actually contain. The salt dissolves more readily and the molecule is smaller, so it sits in the outer layer of skin rather than only on top of it.
- Ethylhexylglycerin preservative booster
- Ethylhexylglycerin softens skin and boosts a preservative system, which is why it is nearly always sitting beside phenoxyethanol or 1,2-hexanediol. It also cuts down the odour bacteria produce, so it turns up in deodorising products.
- Disodium EDTA chelator
- EDTA is a chelator: it locks up trace metal ions from water and packaging that would otherwise turn a formula cloudy, off-colour or rancid. It does nothing to skin and appears at a fraction of a percent.
- Citrus Aurantium Bergamia (bergamot) Fruit Oil fragrance component
- Bergamot Fruit Oil is a citrus essential oil and the top note of eau de cologne. It scents a formula; citrus oils are the aromatic class most likely to bother reactive skin.
15 more explained
- Panthenol humectant
- Panthenol is pro-vitamin B5: skin converts it to pantothenic acid. It is a humectant that holds water and leaves skin feeling soft and less tight, and it is one of the ingredients formulators reach for when a formula also contains something harsh.
- Biosaccharide Gum-1 polysaccharide
- Biosaccharide Gum-1 is a fermentation-derived sugar polymer that binds to skin and holds a moisture film in place. It gives a silky, non-tacky feel.
- Ectoin humectant
- Ectoin is a small molecule that microbes in salt flats and hot springs make to survive extreme conditions. In skincare it holds water tightly around itself, which is why it appears in formulas aimed at reactive, easily dehydrated skin.
- Tocopherol antioxidant
- Tocopherol is vitamin E. It is an oil-soluble antioxidant that protects the oils in a formula from going rancid and works on skin as an emollient, and it is regularly paired with vitamin C because each keeps the other going for longer.
- Salix Alba (willow) Bark Extract plant extract
- Willow Bark Extract carries salicin, the plant compound salicylic acid is related to. The two are not interchangeable: willow bark is a mild clarifying extract, not a BHA exfoliant at the levels used in cosmetics.
- Limonene fragrance component
- Limonene is the citrus-peel aromatic. It appears here because EU labelling requires 26 fragrance components to be named individually rather than hidden inside "fragrance", and it is one of them.
- Linalool fragrance component
- Linalool is a floral aromatic found in lavender, bergamot and coriander. It is one of the 26 fragrance components EU labelling requires to be declared by name.
- Trehalose humectant
- Trehalose is a sugar that some desert plants use to survive drying out. In skincare it is a humectant that holds water in the outer layer and helps a formula feel comfortable rather than tight.
- Pullulan film former
- Pullulan is a fermentation-derived polysaccharide that dries to a tight film, which is why it produces a temporary, visible tightening feel on the skin.
- Polyglyceryl-10 Myristate emulsifier
- Polyglyceryl-10 Myristate is a mild sugar-derived emulsifier used to keep oil dispersed in a watery formula.
- Arginine amino acid
- Arginine is an amino acid that does two jobs here: it holds water in the outer layer of skin, and it neutralises acidic gelling agents, which is why it often stands in for a synthetic pH adjuster.
- Carbomer thickener
- Carbomer is a synthetic polymer that only gels once a base neutralises it, which is why arginine or tromethamine sits nearby on the list. It gives the clear, non-stringy gel texture a xanthan formula cannot reach.
- Glyceryl Acrylate/Acrylic Acid Copolymer film former
- This is a polymer that forms a moisture-holding film on the surface, usually supplied with glycerin and propylene glycol as a hydrating complex.
- Pvm/Ma Copolymer film former
- PVM/MA Copolymer is a film-forming polymer used to hold a formula in place and, in a mask, to give the peel-off film its strength.
- Pelargonium Graveolens Flower Oil fragrance component
- Pelargonium Graveolens is rose geranium. Its flower oil is an essential oil used to scent a formula, carrying citronellol and geraniol.
- Market
- Korean market, the version sold in Korea
- EAN (barcode)
- 8809936741580
- Made in
- Republic of Korea
- Volume
- 10 ea
- Category
- Mask
- Actives
- Ectoin, Panthenol, Sodium Hyaluronate, Trehalose
- Ships from
- California or Korea
Orders ship from California or direct from Korea with tracked delivery to your door, and both routes carry the same Korean-market release. Shipping is free on orders of $100 or more. Returns are accepted for 30 days, by mail.
We split shipments free, so one out-of-stock item never holds up the rest of your order.
Where this unit came from
- 1Seoul
Bought as Korean-market stock - 2Barcode
Listed against the Korean barcode on its box - 3California or Korea
Ships to you from either, as the same Korean-market release
We stock the version of a formula that is sold in Korea, not the release a brand prepares for another market under the same name. The barcode in the specification above is the Korean-market one and it is printed on the box you receive.
Every unit keeps its original barcode and batch code intact, so the unit in your hands can be checked against the brand’s own records.
Every order ships from California or direct from Korea, and returns run for 30 days.
Every claim on this page traces to the unit in the box, the barcode, the batch code and the price you can read for yourself.
Inside the formula
Inside the formula
Worth knowing
- Patch test on the inner arm before first full use, as with any new skincare product.
Complete the routine
- This itemMEDIHEAL Hyaluronate Bio Seconderm Mask Deep Moisturizing (Ampoule 4ml + Mask 23ml) X 10ea$55.00

- The treatment step of this routineMEDIHEAL Tea Tree Calming Barrier Ampoule 50ml$37.50

- Cleanse first, so the next step meets bare skinMEDIHEAL Teatree Trouble Calming Cleanser 120ml$15.00

Total for 3 items$107.50
Reviews
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MEDIHEAL Hyaluronate Bio Seconderm Mask Deep Moisturizing (Ampoule 4ml + Mask 23ml) X 10ea
How it felt, how your skin took it, what you layer it with. Straight answers help the next person choose.
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MEDIHEAL, Korean-market original
MEDIHEAL's Hyaluronate Bio Seconderm Mask Deep Moisturizing (Ampoule 4ml + Mask 23ml) X 10ea, sourced for the Korean market.
Verify your unit when it arrives
Verify your unit when it arrives
Korean-market stock with the original barcode and batch code intact, exactly as it left Korea.
On the unit itself
- The Korean-market barcode, unaltered from the retail package.
- The manufacturer’s batch code, exactly as the maker printed it.
정품Genuine article, Korean-market stock
What professionals say
What professionals say
What skin-care professionals say about skin care, quoted from the medical sources linked beside each.
Your skin barrier is basically your outer layer of the skin.
Melissa Piliang, MDDermatologist, Cleveland Clinic Pretty much every step of a Korean skin care routine is going to have some component of hydration.
Alok Vij, MDDermatologist, Cleveland Clinic
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