- Estimated level
- 10–40%
- Confidence
- Low — inferred from list position alone
- Roles
- Occlusive, Texture agent
1st on the list, which puts it at an estimated 10–40% of the formula.
Cellulose, carboxymethyl ether, sodium salt
COSRX
Master Patch Basic
face patch
COSRX
Master Patch Basic
face patch
Added Last edited
Fit by skin type
General, ingredient-based — not your personalized match.
Dry
70%
Combination (dry)
70%
Balanced
100%
Combination (oily)
70%
Oily
70%
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5
Ingredients
0
Benefits
0
Actives
The COSRX Master Patch Basic is just like the original acne spot patch, but even better. It is a Comfortable spot treatment to solve your unplanned breakouts. Containing hydrocolloid acne patches effectively absorb pus from pimples and protect them from further infection due to external bacteria and more. The patch comes in a round and flat shape, and can be worn under makeup.
Full Ingredients
5 total
About Master Patch Basic
Overview
Master Patch Basic is a cushioning patch from COSRX, a brand based in Korea. The ingredient list runs to 5 ingredients, each broken down in full below.
Texture and finish
By its ingredient list the formula reads as moderately cushioned — emollient enough to feel like a cream, without the heaviest occlusives near the top. There is very little humectant content, so this is not the step in a routine that adds water to skin.
Who it suits
On richness alone it suits Balanced skin best, and is the least natural fit for Dry, Combination (dry), Combination (oily) and Oily 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.
What it does not target
The formula contributes little or nothing on hydration, barrier support, antioxidant protection and oil control. 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.
What is not in 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.
Where it fits in a routine
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.
Pros and cons
Drawn purely from the ingredient list
Pros
- No fragrance or declared allergens
- No essential oils
- No drying alcohol
- Silicone-free
- No microplastics
- No common irritants flagged in the list
- No recognised malassezia (fungal acne) triggers
Which skin types it suits
Scored on how rich or light the formula reads from its INCI order.
Suitable for
- Balanced skin
Less suitable for
- Dry skin
- Combination (dry) skin
- Combination (oily) skin
- Oily skin
Sensitive 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.
Formula analysis
Each axis is scored from the ingredients present and how high up the list they sit.
Hydration
None
Ingredients that pull and hold water in the upper layers of skin
Barrier support
None
Lipids and repair signals that support skin barrier integrity
Antioxidant support
None
Ingredients that mop up free radicals from UV and pollution
Oil control
None
Ingredients that moderate sebum or absorb shine
Brightening
None
Ingredients that act on uneven tone and post-inflammatory marks
Soothing
None
Ingredients aimed at visible redness and reactivity
Cell renewal
None
Retinoids, acids and enzymes that speed surface turnover
Firmness signalling
None
Peptides and growth factors that signal for collagen support
What is and is not in it
Read from the full ingredient list. A brand's own claim may differ.
Free from
- Fragrance-free
- Essential-oil-free
- No drying alcohol
- Paraben-free
- Silicone-free
- Microplastic-free
- Sulfate-free
- Dye-free
- Oil-free
- No animal-derived ingredients
What to layer it with
Judged by the same curated rules our routine checker uses. It reads the ingredients, not the label.
Compatible with
- Vitamin C (L-ascorbic acid)
- Retinoids (retinol, retinal)
- AHAs (glycolic, lactic)
- BHA (salicylic acid)
- PHAs (gluconolactone)
- Benzoyl peroxide
- Azelaic acid
- Copper peptides
- Bakuchiol
- Niacinamide
- Hyaluronic acid
- Ceramides
- Signal peptides
- Panthenol
- Sunscreen
Nothing in this formula belongs to a group our rules can put in conflict, so it layers freely. Order still matters — thinnest texture first.
Where it fits in a routine
Evening
- Cleanse
- Toning
- Spot treat
- Moisturise
This product is the "Spot treat" step.
- Keep it to the spot itself — treating clear skin buys irritation, not results.
Safety and suitability
Flags to check, not verdicts. None of this is medical advice — if you are pregnant, breastfeeding or treating a skin condition, ask a doctor.
- Pregnancy and breastfeeding
- Nothing in this formula is on the standard pregnancy-caution list. That is not clearance — ask your doctor about anything you use daily.
- Fungal acne (malassezia)
- No ingredient here is a recognised food source for malassezia.
- Sensitive and reactive 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.
Ingredients by function
Most ingredients do more than one job, so these counts add up to more than the 5 ingredients on the label.
4
Texture agent
Sets the thickness, spread and stability of the formula
3
Occlusive
Forms a film that slows water loss
1
Antioxidant
Neutralises free radicals from UV and pollution
1
Exfoliant
Loosens or dissolves dead surface cells
Ingredient breakdown
Every ingredient on the label, in order, with what it does and roughly how much of it is likely to be there.
- Estimated level
- 5–20%
- Confidence
- Low — inferred from list position alone
- Roles
- Exfoliant, Texture agent
2nd on the list, which puts it at an estimated 5–20% of the formula.
Hydrogenated Poly(C6-20 olefin) is a polymer synthesized from hydrogenated C6-20 olefins
- Estimated level
- 5–20%
- Confidence
- Low — inferred from list position alone
- Roles
- Occlusive, Texture agent
3rd on the list, which puts it at an estimated 5–20% of the formula.
Homopolymer of 2-methyl-1 propene
- Estimated level
- 2–10%
- Confidence
- Low — inferred from list position alone
- Roles
- Occlusive, Texture agent
4th on the list, which puts it at an estimated 2–10% of the formula.
Benzene, ethenyl-, polymer with 2-methyl-1,3-butadiene
- Estimated level
- 2–10%
- Confidence
- Low — inferred from list position alone
- Roles
- Antioxidant
5th on the list, which puts it at an estimated 2–10% 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
Frequently asked questions
What ingredients are in Master Patch Basic?
CELLULOSE GUM, HYDROGENATED POLY(C6-20 OLEFIN), POLYISOBUTENE, STYRENE/ISOPRENE COPOLYMER, PENTAERYTHRITYL TETRA-DI-T-BUTYL HYDROXYHYDROCINNAMATE.
How do I use Master Patch Basic?
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.
What skin types is Master Patch Basic good for?
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), Combination (oily), Oily skin.
Is Master Patch Basic good for sensitive 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.
Is Master Patch Basic fungal acne safe?
No ingredient in this formula is a recognised food source for malassezia, the yeast behind fungal acne.
Can I use Master Patch Basic while pregnant?
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.
Is Master Patch Basic fragrance free?
Yes. Reading the full ingredient list, this formula is fragrance-free.
Does Master Patch Basic contain alcohol?
No. Reading the full ingredient list, this formula is no drying alcohol.
Is Master Patch Basic silicone free?
Yes. Reading the full ingredient list, this formula is silicone-free.
Does Master Patch Basic contain essential oils?
No. Reading the full ingredient list, this formula is essential-oil-free.
Is Master Patch Basic paraben free?
Yes. Reading the full ingredient list, this formula is paraben-free.
What can I layer with Master Patch Basic?
It layers well with Vitamin C (L-ascorbic acid), Retinoids (retinol, retinal), AHAs (glycolic, lactic), BHA (salicylic acid), PHAs (gluconolactone), Benzoyl peroxide.
When should I apply Master Patch Basic?
Use it in the evening, on affected areas only, after serums.
How many ingredients does Master Patch Basic have?
It lists 5 ingredients, of which 0 are recorded as actives.
Who makes Master Patch Basic?
COSRX, a brand based in Korea.