COSRX
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 yet- Ships from our California warehouse
- Duties prepaid
- Suited to
- TexturedCongestedOilyCombination
- Helps with
- Rough surface textureExcess oilBreakouts and congestion
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- Duties prepaid
- 30-day returns
- Free US shipping on orders of $100 or more
- Dispatched within 2 business days
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.
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
Key actives
Salicylic Acid
oil-soluble care built into the dressing
Melaleuca Alternifolia (Tea Tree) Leaf Oil
the classic clarifying botanical
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.
- Ships from
- California
Duties are prepaid. Nothing is owed at delivery. Returns are accepted for 30 days, by mail.
Orders ship from our California warehouse, dispatched within 2 business days, and arrive in 3 to 5 days. Shipping is free on orders of $100 or more.
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 - 2Customs
Duty paid by us before it enters the US - 3California
Ships domestically, no international leg
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.
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.
Import duties are paid by us before the parcel reaches you, so nothing is owed at the door, 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.
Payment and security
We accept
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.
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, 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 the key actives in this formula, quoted from the medical sources linked beside each.
BHAs like salicylic acid get really deep into the pores, whereas the water-soluble ones don't go as deep.
Samantha Stein, PA-CDermatology physician assistant, Cleveland Clinic I think it's fair to say I've seen lots of patients use tea tree oil for a variety of skin issues. It's a natural remedy that is known to help.
Simon Hodes, MB ChBFamily physician, Cleveland Clinic
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