Master Patch Intensive
The stepped-up patch in COSRX's Master Patch range, pressed over one spot at the end of the evening routine and left overnight.
No reviews yet36ea
- Korean-market formula
- Ships from California or direct from Korea
- Korean barcode and batch code intact
- Suited to
- TexturedCongestedOilyCombination
- Helps with
- Rough surface textureExcess oilBreakouts and congestion
Sold out.
Tell us where to send it
One email, the moment this exact unit is back in stock. Not a newsletter and not a sequence, and your address comes off the list the second it is sent.
- 30-day returns
- Free US shipping on orders of $100 or more
- Tracked delivery to your door
How it works
A stubborn spot usually gets a heavy cream piled onto it, which moves the problem around rather than covering it. A patch does the opposite: it seals over one place and stays there while the dressing takes up what the spot gives off. This is the intensive cut in COSRX's Master Patch range, the version with actives worked into the material rather than a plain dressing. It goes on last, on clean dry skin, and comes off in the morning. One patch per spot per night, and a fresh one the next evening if it is still wanted.
Inside the formula
Inside the formula
How to use
- Press one Master Patch Intensive onto clean, dry skin at the end of the evening routine.
- Pick the patch that covers the spot with a margin, then smooth it down until the edges lie flat.
- Nothing goes over it. Every leave-on layer needs to have absorbed before it goes on.
- One patch per spot per night. Do not reuse a patch that has been peeled off, and do not layer one over a cream.
COSRX Master Patch Intensive
What makes the Master Patch Intensive different from the Basic version?
This patch shares its adhesive base, cellulose gum, hydrogenated poly(C6-20 olefin), polyisobutene and styrene/isoprene copolymer, with the rest of the line, then adds two more ingredients: salicylic acid and tea tree leaf oil, both named directly in the six-entry list. Salicylic acid sits fifth, ahead of the tea tree oil that follows it. The patch works as a dressing with those two ingredients built into the material itself.
Is the added salicylic acid a problem for sensitive skin?
Fragrance, denatured alcohol, silicone, parabens, sulfate surfactants, mineral oil and added colourant are all absent from this ingredient list, though salicylic acid and tea tree leaf oil are both present and named directly. Salicylic acid can be more likely to irritate on skin that already reacts to actives, since it's an ingredient with its own sensitivity profile rather than an inert dressing material. Trying one patch on a small area first is a reasonable way to check.
Does one patch clear congestion overnight?
The hydrocolloid base absorbs fluid from the spot the same way any patch in the line does, turning visibly white or cloudy as it fills. Salicylic acid and tea tree leaf oil sitting in the material are ingredients that work with repeated, patch-by-patch use over several days, not a single overnight application. Judging the result after one patch skips the part where those two ingredients are doing their slower work.
Can I still use my regular salicylic acid toner or serum with this patch?
Since salicylic acid is already named in this patch's material, layering a separate salicylic acid product directly underneath adds more of the same ingredient to one spot at once. Using this patch on its own for a congested area, and saving a leave-on salicylic acid step for the rest of the face, keeps the two from stacking on the exact same skin.
How do I make sure my Master Patch Intensive is the real Korean-market formula?
The EAN 8809598453821 on the box is a direct check against your own unit. COSRX additionally verifies units itself: entering the batch number and expiration date printed on your box into the verification page at cosrx.com confirms it from COSRX's side. Reading those codes off your own packaging, rather than a listing, is the actual point of that system.
Full INCI (6): Cellulose Gum, Hydrogenated Poly(C6-20 Olefin), Polyisobutene, Styrene/Isoprene Copolymer, Salicylic Acid, Melaleuca Alternifolia (Tea Tree) Leaf Oil
Ingredient list read from jolse.com on 9 September 2026.
6 of 6 explained
- Cellulose Gum thickener
- Cellulose Gum is plant cellulose modified to dissolve in water. It thickens, holds particles in suspension and gives a smooth, slippery body.
- Hydrogenated Poly(C6-20 Olefin) emollient
- Hydrogenated Poly(C6-14 Olefin) is a synthetic hydrocarbon emollient. It gives a smooth, silicone-like glide and is completely stable, so it does not go rancid.
- Polyisobutene film former
- Polyisobutene is a synthetic polymer that forms a flexible, water-resistant film. It gives gloss and holds a formula in place, which is why it appears in lip products and long-wear textures.
- Styrene/Isoprene Copolymer film former
- Styrene/Isoprene Copolymer is a synthetic rubber used in patch adhesives. Its contribution is elasticity: the film stretches with skin instead of lifting at the edge.
- Salicylic Acid exfoliant
- Salicylic Acid is a BHA, and the only common exfoliant that is oil soluble, so it can work inside a pore rather than only on the surface. It loosens the dead cells that block pores and is used for the look of congested, oily skin.
- Melaleuca Alternifolia (Tea Tree) Leaf Oil fragrance component
- Tea Tree Leaf Oil is an essential oil from an Australian shrub, carrying terpinen-4-ol. Korean formulas use it in products aimed at blemish-prone skin; it is potent, aromatic, and one of the essential oils most likely to bother reactive skin.
- Market
- Korean market, the version sold in Korea
- EAN (barcode)
- 8809598453821
- Made in
- Republic of Korea
- Volume
- 36ea
- Category
- Hydrocolloid Blemish Patch
- Actives
- Salicylic Acid, Tea Tree
- 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.
Key benefits
- Salicylic acid is built into the patch material for congested spots
- Tea tree leaf oil joins the clarifying side
- Hydrocolloid absorbs fluid and turns visibly white as it works
- Skin-toned finish blends in for day or night wear
Worth knowing
- This formula carries an active acid, so pairing it with another exfoliant in the same routine is worth spacing out.
Reviews
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COSRX Master Patch Intensive
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COSRX, Korean-market original
Intensive hydrocolloid patches, 36 ea, with Salicylic Acid and Tea Tree.
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.
COSRX verifies units itself. Find the verification page on cosrx.com and enter the batch number and expiration date printed on your unit. Read them off the package rather than from us, which is the point.
Source: COSRX FAQ
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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