COSRX Acne Pimple Master Patch — Patchs Hydrocolloïdes 24p

These patches are based on a simple yet powerful technology: hydrocolloid (Cellulose Gum). This semi-occlusive material creates a moist micro-environment that speeds up healing while absorbing exudate — the yellowish fluid that accumulates in inflammatory lesions. The result: the blemish drains naturally, without aggressive handling.

The patch structure incorporates Styrene Isoprene Styrene Block Copolymer, an elastic polymer that ensures flexible adhesion on the mobile areas of the face (around the mouth, chin). Unlike rigid patches, it follows micro-movements without peeling off.

The Polyisobutylene and the Petroleum Resin form a waterproof protective barrier: you can thus shield the imperfection from external aggressions (pollution, fingers, bacteria) while allowing the skin to breathe underneath. The patch whitens as it absorbs — a visual signal that the work is in progress.

☀️ Morning routine

1. Cleanse your face with a gentle cleansing gel, then thoroughly dry the area (the patch does not stick to wet or oily skin).
2. Apply the patch directly on the blemish, without any skincare underneath (no toner, no serum). The hydrocolloid must be in direct contact with the skin.
3. Choose the appropriate size: 7 mm for micro whiteheads, 10 mm for medium pimples, 12 mm for larger inflammatory lesions. The patch should slightly overlap the edge of the imperfection.
4. Continue your routine on the rest of your face, avoiding the patched area. You can apply makeup over it (the patch is translucent).

🌙 Evening routine

1. Same protocol: clean and dry skin.
2. Leave on overnight — absorption is maximal during sleep (the patch may turn white, indicating it has absorbed excess sebum and impurities).
3. Gently remove upon waking. If the blemish is not fully gone, apply a new patch.

This pack of 24 patches is designed for those who:

• Have acne-prone skin with occasional breakouts (1 to 3 pimples per week) and are looking for a targeted solution without drying out the entire face.
• Can’t help but touch their blemishes — the patch acts as a physical and psychological shield.
• Want to speed up the healing of a popped pimple (the patch absorbs residual fluid and reduces the risk of post-inflammatory marks).
• Are seeking a gentle alternative to anti-pimple drying treatments (no alcohol, no benzoyl peroxide, no irritating ingredients).

Avoid if: you have deep, unpopped cysts (hydrocolloid only works on surface lesions with exudate). In this case, opt for an intensive patch enriched with keratolytic agents.

From the very first night: inflammation visibly reduced, the spot flattened by 30 to 50% depending on its maturity. The patch turns white — proof that absorption has worked.

After 8 to 12 hours: irritated breakouts can be soothed and visibly reduced. Perilesional redness decreases thanks to moisture retention (no dry crust that sustains inflammation).

In the long term: used as soon as the spot appears, the patch limits the temptation to pick — thus significantly reducing the risk of pigmented or atrophic scars. This targeted treatment speeds up healing and helps prevent acne marks.

What patch size should I choose for each type of pimple?

The pack contains 24 patches (9 Large 12mm, 5 Medium 10mm, 10 Small 7mm). Use the small ones (7 mm) for closed micro-comedones, the medium ones (10 mm) for regular pimples, and the large ones (12 mm) for extensive inflammatory lesions. Always choose a size slightly larger than the diameter of the blemish.

Can I apply other skincare products under the patch?

No. The hydrocolloid must adhere directly to clean, dry skin, without any residue from toner, serum, or cream. Do not apply any essence or lotion beforehand. Otherwise, adhesion will be compromised and absorption ineffective.

How long should I keep the patch on?

We recommend wearing the patch until it turns white. In practice: 8 to 12 hours for optimal absorption. You can replace it between two cleansings if the pimple continues to secrete. Remove it when the exudate is no longer visible.

Is the patch compatible with makeup?

Yes, its translucent finish allows it to be worn during the day under foundation. Apply the patch first, then gently apply makeup around it (avoid rubbing directly on it to prevent peeling). Users appreciate its discreet nature.

Can I use it on a non-popped pimple?

Yes, provided it is surface-level with a visible white head. Hydrocolloid patches protect damaged or troubled areas and maintain skin moisture to prevent new breakouts. On a deep cyst without an opening, effectiveness will be limited.

Is it really sold every 25 seconds worldwide?

According to the brand, an Acne Pimple Master Patch is sold every 25 seconds — a figure that reflects its cult status in the K-beauty world since its launch.

COSRX was founded in 2013 by Jeon Sanghoon, a cosmetic chemist whose ultra-reactive skin could not tolerate any products on the market at the time. Rather than endure it, he decided to formulate himself: short INCI lists, properly dosed active ingredients, textures designed for sensitive skin. The name COSRX merges "cosmetics" and "Rx" (prescription) — this fusion captures the essence of the brand: offering targeted care, almost medical-grade, but without frills.

From 2014, international success exploded thanks to digital word-of-mouth: skincare bloggers shared the spectacular results of the BHA Blackhead Power Liquid and the snail mucin line. Today, the brand is available in more than 52 countries, with over 85% of its revenue generated internationally. COSRX embodies pragmatic K-beauty, without overdone storytelling — just products that work.

Discover the entire COSRX range

Complete INCI list:

Cellulose Gum, Styrene Isoprene Styrene Block Copolymer, Polyisobutylene, Petroleum Resin, Polyurethane Film, Liquid Paraffin, Tetrakismethane.

Breakdown of main active ingredients:

• Cellulose Gum (Carboxymethylcellulose) : hydrocolloid polymer derived from plant cellulose, responsible for absorbing exudate and maintaining local moisture.
• Styrene Isoprene Styrene Block Copolymer : elastomer that provides flexibility and adhesion to the patch, even on moving areas.
• Polyisobutylene + Petroleum Resin : tackifying agents that ensure long-lasting adhesion without harsh residue.
• Polyurethane Film : waterproof protective film that isolates the blemish from external aggressions (water, bacteria, pollution).
• Liquid Paraffin (Paraffinum Liquidum) : non-comedogenic occlusive emollient, stable and hypoallergenic.

Formulated without parabens, sulfates, artificial colorants, fragrances, animal-derived ingredients, alcohol, essential oils, or silicone. Vegan. Hypoallergenic tested in Korea.