COSRX – Master Patch Intensive 36pcs

A thin, discreet hydrocolloid acne patch designed for both daytime and nighttime use, offering stronger adhesion and a more refined edge compared to standard round patches.

It helps protect pimples, absorb pus and oil, and flatten inflamed breakouts by creating a sealed, moist healing environment.

This “Intensive” version is enhanced with active acne-support ingredients (salicylic acid + tea tree oil) for additional blemish care beyond basic hydrocolloid function.

Key design difference: oval, tapered shape for better skin blending and facial contour fit.

Key Active Ingredients

  • Hydrocolloid (Cellulose Gum-based dressing) – absorbs pus and excess sebum while maintaining a moist healing environment
  • Salicylic Acid (0.02%) – helps exfoliate inside the pore and supports faster clearing of clogged sebum
  • Tea Tree Leaf Oil (0.02%) – provides mild antimicrobial and soothing effects for redness-prone acne
  • Polymer adhesive base (Polyisobutene, Styrene/Isoprene Copolymer, etc.) – ensures strong adhesion and flexible skin fit

 Unlike classic COSRX patches, this version is not purely hydrocolloid—it includes mild acne-active ingredients.

How It Works (Simple Mechanism)

  • Hydrocolloid: pulls out fluid (pus/oil)
  • Salicylic acid: supports pore unclogging
  • Tea tree oil: helps calm bacteria-related irritation
  • Occlusive seal: prevents picking + external contamination

How to Use

  1. Cleanse and completely dry skin
  2. Choose a patch slightly larger than the pimple
  3. Apply directly onto acne (no skincare underneath)
  4. Leave for 6–12 hours or overnight
  5. Remove when patch turns white and replace if needed

Contraindications & Precautions

  • External use only
  • Do not use on deep cystic or infected wounds
  • Do not apply under skincare products (serum, cream, oil)
  • Do not reuse patches
  • Stop if irritation occurs (due to actives like salicylic acid or tea tree)
  • Less effective on dry, non-fluid acne (closed comedones)

Suitable For

  • Inflamed pimples with visible pus
  • Acne needing both protection + mild active treatment
  • Daytime wear (more discreet than round patches)
  • Users who want slightly stronger results than basic hydrocolloid patches