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Join for free →A functional and effective hydrocolloid patch for superficial blemishes, but the brand's 'mineral-oil-free' claim is misleading given its ingredient list.
₹299 • Analysed 22 October 2026
The COSRX Master Patch Original Fit is a popular and accessible acne solution in the Indian market, offering a practical approach to managing breakouts. Its hydrocolloid composition is well-suited for the humid Indian climate, as it helps absorb excess moisture and protect blemishes without drying out the surrounding skin. While the 'Mineral-oil-free' claim is contradicted by the INCI, the core function of the patch (absorption and protection) remains relevant for Indian consumers dealing with acne and post-inflammatory hyperpigmentation. The product's pricing is competitive for its category, making it an affordable option for targeted spot treatment.
Independent and free. The Clean Sheet takes no money from brands to analyse, rank, or approve a product. This is a web evidence analysis, not a Clean Sheet certification. We checked the ingredient list, publicly available test reports, marketing claims, and formula logic using only public information available at the time of analysis.
Hydrocolloid patches are medically recognized for moist wound healing and absorption, which contributes to faster resolution of acne lesions. The 'fast-acting' aspect is supported by the known mechanism of hydrocolloids.
Hydrocolloid dressings are classified as medical devices by the FDA, indicating their recognized efficacy and safety for wound care. This is a strong regulatory approval for the material.
The physical barrier of the patch effectively shields the blemish from external factors like dirt, bacteria, and picking, which is a primary function of hydrocolloid dressings.
Hydrocolloid material is designed to absorb wound fluid (exudate), pus, and excess oil from surfaced blemishes, which is a well-established mechanism. The patch turning white is a visible indicator of this absorption.
While hydrocolloids create a moist healing environment that can indirectly reduce inflammation and minimize scarring by preventing further irritation and promoting optimal healing, the patch itself does not contain specific anti-inflammatory actives. The claim relies on the general properties of hydrocolloid dressings rather than specific finished-product testing for these endpoints.
The patch forms a physical occlusive barrier that prevents external bacteria from entering the wound, a fundamental function of hydrocolloid dressings.
Moist wound healing is a well-established medical principle that hydrocolloid patches leverage to accelerate healing. The 'overnight' aspect is a common observation for superficial blemishes.
The physical properties of the patch (thinness, transparency) are observable and widely reported by users. While 'virtually invisible' is subjective, the design aims for discretion.
What we could confirm from public sources and the verified ingredient list.
Ingredient Safety & Toxicity
Full ingredient list retrieved and verified against the label.
Screened against the ingredient database (0 of 7 ingredients matched); no cosmetics-prohibited ingredient found.
No ingredient with a recognised endocrine-activity concern found in the database.
No IARC-classified or formaldehyde-releasing ingredient found in the database screen.
Irritation & Allergen Risk
No EU-declarable or database-flagged allergen found in the list.
No high-sensitisation preservative (MI/MCI/formaldehyde-releaser) from our screen was found.
Ingredient Transparency
The full INCI list is publicly available, not just hero ingredients.
Ingredients are listed in the descending order required by India Cosmetics Rules 2020.
Standards & Compliance
Usage warnings and directions are clear on the label.
Screened against a curated reference set that we are continuing to verify and expand, so “clear” means no flag from that set, not a guarantee. Not a substitute for a full toxicological or clinical assessment.
| Ingredient |
|---|
Cellulose Gum |
Styrene Isoprene Styrene Block Copolymer |
Polyisobutylene |
Petroleum Resin |
Polyurethane Film |
Liquid Paraffin |
Tetrakis Methane |
INCI order as declared on packaging. Position reflects approximate concentration (high to low).
No prohibited or restricted ingredients identified.
No prohibited or restricted ingredients identified. The product's INCI is disclosed, which aligns with India Cosmetics Rules 2020.
No prohibited or restricted ingredients identified.
No prohibited or restricted ingredients identified. Hydrocolloid dressings are recognized as medical devices by the FDA.
No prohibited or restricted ingredients identified.
No prohibited or restricted ingredients identified.
No prohibited or restricted ingredients identified.
No prohibited or restricted ingredients identified.
No prohibited or restricted ingredients identified.
No prohibited or restricted ingredients identified.
Flags are based on publicly available INCI only. Not a substitute for full regulatory compliance assessment.
“Mineral-oil-free”
The claim 'Mineral-oil-free' is directly contradicted by the presence of 'Liquid Paraffin' in the INCI list, which is a form of mineral oil. This constitutes a misleading claim under ASCI Chapter 1 (Truthful and Honest).
Hydrocolloid patches are medically recognized for moist wound healing and absorption, which contributes to faster resolution of acne lesions. The 'fast-acting' aspect is supported by the known mechanism of hydrocolloids.
Evidence visible
Hydrocolloid dressings are classified as medical devices by the FDA, indicating their recognized efficacy and safety for wound care. This is a strong regulatory approval for the material.
Evidence visible
The physical barrier of the patch effectively shields the blemish from external factors like dirt, bacteria, and picking, which is a primary function of hydrocolloid dressings.
Evidence visible
Hydrocolloid material is designed to absorb wound fluid (exudate), pus, and excess oil from surfaced blemishes, which is a well-established mechanism. The patch turning white is a visible indicator of this absorption.
Evidence visible
While hydrocolloids create a moist healing environment that can indirectly reduce inflammation and minimize scarring by preventing further irritation and promoting optimal healing, the patch itself does not contain specific anti-inflammatory actives. The claim relies on the general properties of hydrocolloid dressings rather than specific finished-product testing for these endpoints.
Mentioned only
The patch forms a physical occlusive barrier that prevents external bacteria from entering the wound, a fundamental function of hydrocolloid dressings.
Evidence visible
Moist wound healing is a well-established medical principle that hydrocolloid patches leverage to accelerate healing. The 'overnight' aspect is a common observation for superficial blemishes.
Evidence visible
The physical properties of the patch (thinness, transparency) are observable and widely reported by users. While 'virtually invisible' is subjective, the design aims for discretion.
Evidence visible
Claimed by the brand and supported by SkinSAFE analysis which found it free of many common allergens.
Evidence visible
Claimed by the brand and supported by ingredient analysis (e.g., SkinSAFE) which found no highly comedogenic ingredients.
Evidence visible
This analysis evaluates brand claims against visible evidence and formula logic. It does not replace a full ingredient safety analysis or a clinical product test. Results vary by individual, and the consumer should always read the full ingredient list and follow usage guidance.
Are you the brand? If you have published test data or want to request a re-analysis, write to us at hello@thecleansheet.in.