Ingredient review
C30-38 Olefin/Isopropyl Maleate/MA Copolymer
INCI: C30-38 OLEFIN/ISOPROPYL MALEATE/MA COPOLYMER
A synthetic film-former that helps products stay put and resist water, but offers no active skincare benefit.
In plain English
This is a man-made polymer that creates a thin, flexible film on your skin or hair. Think of it like a clear, invisible shield that helps sunscreen or makeup stay in place longer, especially when you sweat or get wet. It doesn't moisturize or treat your skin—it's purely a texture and performance booster.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
C30-38 Olefin/Isopropyl Maleate/MA Copolymer is generally a lower-concern ingredient when the full formula suits your skin.
Plain-English read
Treat this as a practical screening step before you compare products that contain this ingredient.
- Step 1Start with the score, then check the irritation and clogging risk before judging C30-38 Olefin/Isopropyl Maleate/MA Copolymer.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.
Score terms in plain English
Irritation risk
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
A synthetic copolymer made from long-chain olefins and maleic anhydride derivatives, designed to form a flexible, water-resistant film on the skin or hair.
How it works
When applied, the polymer molecules link together as the solvent evaporates, creating a continuous film that adheres to the skin. This film acts as a barrier that resists water and oil, helping other ingredients (like UV filters or pigments) stay put and not rub off easily.
Pros
Boosts water resistance
Helps sunscreens and makeup survive sweat, humidity, and swimming, so you don't have to reapply as often.
Improves wear time
Creates a flexible film that keeps foundation and eye makeup from fading or creasing throughout the day.
Cons and cautions
No active skincare benefit
This ingredient is purely a performance enhancer—it won't hydrate, soothe, or treat your skin.
Potential tackiness
On some skin types, especially in high humidity, the film can feel slightly sticky or heavy.
Best for
- Anyone wanting long-lasting, water-resistant sunscreen or makeup
- People with oily skin who prefer products that stay matte longer
Use caution if
- Those with very dry or sensitive skin who may find film-formers uncomfortable or occlusive
Usage tips
Safety summary
Generally recognized as safe for topical cosmetic use. Low irritation and comedogenic potential. No significant safety concerns reported in peer-reviewed literature.
Research notes
Limited independent studies on this specific polymer, but it belongs to a well-studied class of film-forming copolymers with a strong safety profile. Most data comes from manufacturer safety assessments and regulatory reviews.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the US, EU, and many other regions. No known restrictions at typical usage levels.
- Common uses
- Sunscreens, Waterproof makeup, Long-wear foundations, Lip products
- Environmental note
- As a synthetic polymer, it is not biodegradable. However, it is used in low concentrations and is not known to bioaccumulate significantly.
Good to know
- This polymer is often used in combination with other film-formers to fine-tune texture and flexibility.
- It is considered safe for use in cosmetics by major regulatory bodies at typical concentrations.
Common questions
What is C30-38 Olefin/Isopropyl Maleate/MA Copolymer in beauty products?
This is a man-made polymer that creates a thin, flexible film on your skin or hair. Think of it like a clear, invisible shield that helps sunscreen or makeup stay in place longer, especially when you sweat or get wet. It doesn't moisturize or treat your skin—it's purely a texture and performance booster.
What does C30-38 Olefin/Isopropyl Maleate/MA Copolymer do in a beauty product?
When applied, the polymer molecules link together as the solvent evaporates, creating a continuous film that adheres to the skin. This film acts as a barrier that resists water and oil, helping other ingredients (like UV filters or pigments) stay put and not rub off easily.
Is C30-38 Olefin/Isopropyl Maleate/MA Copolymer safe for most people?
Generally recognized as safe for topical cosmetic use. Low irritation and comedogenic potential. No significant safety concerns reported in peer-reviewed literature.
Who should be careful with C30-38 Olefin/Isopropyl Maleate/MA Copolymer?
Those with very dry or sensitive skin who may find film-formers uncomfortable or occlusive
Research sources
Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.