The COSRX Acne Pimple Master Patch is the Korean sticker that made hydrocolloid normal. Before Mighty Patch had a UK Boots endcap and Starface had a yellow tin, this was the pack people ordered from YesStyle and told their friends about.
It's still the one I'd buy first. Not because it's mystical. Because it's cheap, thin, and the size mix is better than most of the louder brands.
What you're actually buying
A resealable pouch of 24 clear hydrocolloid patches in three sizes: small, medium, large. That's the useful bit. One forehead spot is not the same diameter as a chin whitehead, and a single-size pack forces you to waste a big disc or fail to cover a wide one.
The patches are thinner than Mighty Patch Original. On the face they look like a bit of cling film, not a cushion. Under makeup they're less obvious. On a pillow they're slightly more likely to wander if you sleep on that cheek.
There is no salicylic acid, no tea tree, no charcoal. Cellulose gum and the usual hydrocolloid adhesive. It absorbs fluid from a spot that has a head, keeps the area covered, and stops your fingers getting there. That's the product.
COSRX also makes a "Clear Fit" / master patch variant that's even thinner. The original Acne Pimple Master Patch is the one this page is about, and the one you'll see labelled at around £6.
UK price and where to buy
Expect about £5.99–£7 for 24 patches. Cult Beauty, Superdrug, Sephora UK and Amazon all cycle it around that. Sometimes it's on a COSRX multibuy at Superdrug. Don't pay £12 for a single pouch unless you're in an airport.
You can also find it on Korean beauty sites, usually no cheaper once shipping lands. If you want it tonight, Superdrug or a Boots that stocks COSRX is the move. If you want a wider UK comparison, COSRX is the value anchor on that list.
A pouch lives in a bathroom drawer for months. 24 patches is a lot if you only get the odd whitehead, and not a lot if you're in a bad month and using two a night. Buy one, see if the stick works on your skin, then get two pouches next time.
How to use this specific patch
Same rules as every hydrocolloid sticker, and they matter more on a thin patch because a weak seal shows immediately.
Clean the spot. Let it dry completely. No moisturiser underneath. Stick the size that covers the head with a small border. Press for ten seconds. Leave it overnight. Peel it off in the morning.
If you need the longer version of that, it's in how to use pimple patches. COSRX's own instruction is six to eight hours, which is overnight in human terms.
Daytime is where this patch earns its keep. It's thin enough that you can wear one on a cheek without looking like you've applied a plaster. Concealer around it, not under it.
COSRX vs Mighty Patch
This is the comparison everyone wants, so here's the short one. The long one is Mighty Patch vs COSRX.
Price: COSRX wins. Roughly £6 for 24 versus about £8 for a Mighty Patch Original pack of similar count, and Mighty Patch's thinner versions cost more again.
Thickness: Mighty Patch Original is thicker. It feels more "on", absorbs in a more obvious white blob, and stays put better if you thrash in your sleep. COSRX is the daytime / under-makeup patch.
Sizes: COSRX includes three sizes. Mighty Patch Original is mostly one medium size. That alone is a reason to keep COSRX in the drawer.
Stick: Both are fine on dry skin. Mighty Patch is slightly more stubborn. COSRX needs you to be honest about whether your face is actually dry.
For whiteheads: both work. For the mess after you've popped something, the thicker Mighty Patch is a better lid. For a discreet office whitehead, COSRX.
You can own both. You don't need to.
Who should buy it
Buy COSRX if you want a no-drama patch that doesn't announce itself, you like having small and large in one pack, and you don't want to spend Mighty Patch money on the same gel.
Skip it if you sleep on your face and have already lost three thin patches to a pillowcase this month. Get Mighty Patch Original instead. Skip it if what you actually have is cystic acne. No version of this sticker will drain a lump with no head.
If you're choosing a first pack for a teenager who wants them visible on purpose, that's Starface, not this. COSRX is the opposite energy: hide the spot, don't decorate it.
Is it worth buying?
Yes. At six quid it's one of the few skincare products where "just get it" is the right advice. It won't clear your acne. It will flatten the right kind of pimple overnight and stop you picking. That's enough.
Use it on whiteheads and on spots you've already interfered with. Don't use it as your only acne plan. And if a pouch sits unopened because you keep forgetting the dry-skin step, the patch isn't the failure.
FAQs
How much are COSRX pimple patches in the UK?
Usually about £6 for 24. Superdrug, Cult Beauty and Amazon are the places to check first. Ignore anyone selling a single pouch for double that.
Do COSRX pimple patches work?
On whiteheads and spots with a head, yes. They're standard hydrocolloid. They will not fix a deep, closed pimple or a cyst.
How many sizes are in a COSRX Acne Pimple Master Patch pack?
Three: small, medium and large, 24 patches in total. That's the main practical advantage over single-size packs.
Are COSRX patches better than Mighty Patch?
They're cheaper and thinner, with a better size mix. Mighty Patch Original is thicker and often stays on better overnight. Different job, same gel. See the full comparison.
Can you wear COSRX patches during the day?
Yes. They're one of the better daytime options because they're thin and clear. Apply on clean dry skin and keep makeup off the adhesive.