COSRX
Master Patch X-Large
face patch
COSRX
face patch
Added Last edited
Fit by skin type
General, ingredient-based — not your personalized match.
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Take the skin testThe COSRX Master Patch X-Large is a comfortable hydrocolloid patch to solve your large area of oily pores. Comfortable spot treatments to solve your unplanned breakouts. Containing hydrocolloid acne patches that effectively absorb pus from pimples and protect them from further infection due to external bacteria and more.
Master Patch X-Large is a lightweight patch from COSRX, a brand based in Korea. The ingredient list runs to 6 ingredients, each broken down in full below.
By its ingredient list the formula reads as light: water and humectants lead, with emollients kept lower in the order. There is very little humectant content, so this is not the step in a routine that adds water to skin.
On richness alone it suits Balanced skin best, and is the least natural fit for Dry and Combination (dry) skin. Nothing in the list is flagged as a common irritant, which is a reasonable starting point for reactive skin — though a patch test is still the only way to know.
The formula contributes little or nothing on hydration, antioxidant protection, cell renewal and firmness signalling. That is not a fault — most products are not meant to do everything — but if one of those is your priority, this is not the product that will address it.
Reading the full list, the formula is fragrance-free, essential-oil-free, no drying alcohol, paraben-free, silicone-free and microplastic-free. Those claims come from the ingredient list itself, not from the packaging.
Use it in the evening. In a routine it goes on affected areas only, after serums. Keep it to the spot itself — treating clear skin buys irritation, not results.
This summary is generated from the product's ingredient list. It is not a review, it is not the brand's own marketing claims, and it does not replace advice from a dermatologist.
Drawn purely from the ingredient list
Scored on how rich or light the formula reads from its INCI order.
No ingredient in this formula carries a common-irritant flag, making it a reasonable option for reactive skin. A patch test is still recommended, as individual skin reactivity varies.
Based on the curated benefits documented for this product's ingredients.
Boosts collagen and cell turnover to reduce fine lines and wrinkles
Tightens and refines the look of enlarged pores
Calms redness, irritation, and inflammation for sensitive skin
None of the ingredients in this formula are associated with these benefits. This is not unusual, as most products are designed to target a limited number of concerns.
The actives, UV filters and benefit-carrying ingredients in this formula, in the order they are listed.
6th on the list, which puts it at an estimated 2–10% of the formula.
Niacinamide (vitamin B3) is a gentle skincare active that repairs the skin barrier, calms redness, controls oil and evens tone at 2–5%. Official IUPAC name: **3-Pyridinecarboxamide**
Each axis is scored from the ingredients present and how high up the list they sit.
Ingredients that pull and hold water in the upper layers of skin
Lipids and repair signals that support skin barrier integrity
Ingredients that mop up free radicals from UV and pollution
Ingredients that moderate sebum or absorb shine
Ingredients that act on uneven tone and post-inflammatory marks
Ingredients aimed at visible redness and reactivity
Retinoids, acids and enzymes that speed surface turnover
Peptides and growth factors that signal for collagen support
"Active" here means an ingredient carrying a recorded active type or a recognised UV filter.
Solvents, emollients, texture agents and preservatives — the formula that carries the actives.
Read from the full ingredient list. A brand's own claim may differ.
Judged by the same curated rules our routine checker uses. It reads the ingredients, not the label.
Nothing in this formula belongs to a group our rules can put in conflict, so it layers freely. Order still matters — thinnest texture first.
This product is the "Spot treat" step.
Flags to check, not verdicts. None of this is medical advice — if you are pregnant, breastfeeding or treating a skin condition, ask a doctor.
Most ingredients do more than one job, so these counts add up to more than the 6 ingredients on the label.
Sets the thickness, spread and stability of the formula
Forms a film that slows water loss
Changes how skin behaves rather than how it feels
Neutralises free radicals from UV and pollution
Softens and smooths by filling gaps between skin cells
Every ingredient on the label, in order, with what it does and roughly how much of it is likely to be there.
1st on the list, which puts it at an estimated 10–40% of the formula.
Cellulose, carboxymethyl ether, sodium salt
2nd on the list, which puts it at an estimated 5–20% of the formula.
C6-14-alkenes, homopolymers, hydrogenated
3rd on the list, which puts it at an estimated 5–20% of the formula.
Benzenepropanoic acid, 3,5-bis(1,1-dimethylethyl)-4-hydroxy-, 2,2-bis[[3-[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]-1-oxopropoxy] methyl]-1,3-propanediyl ester
4th on the list, which puts it at an estimated 2–10% of the formula.
Homopolymer of 2-methyl-1 propene
5th on the list, which puts it at an estimated 2–10% of the formula.
Benzene, ethenyl-, polymer with 2-methyl-1,3-butadiene
6th on the list, which puts it at an estimated 2–10% of the formula.
Niacinamide (vitamin B3) is a gentle skincare active that repairs the skin barrier, calms redness, controls oil and evens tone at 2–5%. Official IUPAC name: **3-Pyridinecarboxamide**
CELLULOSE GUM, HYDROGENATED POLY(C6-14 OLEFIN), PENTAERYTHRITYL TETRA-DI-T-BUTYL HYDROXYHYDROCINNAMATE, POLYISOBUTENE, STYRENE/ISOPRENE COPOLYMER, NIACINAMIDE.
NIACINAMIDE.
Wash your face thoroughly with cleanser. Stick the Patch onto the dry skin before proceeding with your skin care routine. After 8-10 hours, the Patch would turn white after it absorbed pus and impurities. When it turns white, peel it off gently. Then replace it with a new one.
Judged on how rich the formula reads from its ingredient list, it suits Balanced skin best. It is the least natural fit for Dry, Combination (dry) skin.
No ingredient in this formula carries a common-irritant flag, making it a reasonable option for reactive skin. A patch test is still recommended, as individual skin reactivity varies.
No ingredient in this formula is a recognised food source for malassezia, the yeast behind fungal acne.
Nothing in this formula is on the standard pregnancy-caution list. That is not medical clearance — check anything you use daily with your doctor or midwife.
Yes. Reading the full ingredient list, this formula is fragrance-free.
No. Reading the full ingredient list, this formula is no drying alcohol.
Yes. Reading the full ingredient list, this formula is silicone-free.
No. Reading the full ingredient list, this formula is essential-oil-free.
Yes. Reading the full ingredient list, this formula is paraben-free.
It layers well with Vitamin C (L-ascorbic acid), Retinoids (retinol, retinal), AHAs (glycolic, lactic), BHA (salicylic acid), PHAs (gluconolactone), Benzoyl peroxide.
Use it in the evening, on affected areas only, after serums.
It lists 6 ingredients, of which 1 are recorded as actives.
COSRX, a brand based in Korea.
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