Ingredient review
Maleated Hexene/Propylene Copolymer
INCI: MALEATED HEXENE/PROPYLENE COPOLYMER
A synthetic polymer that helps products stay put and resist water, but offers no direct skin benefit.
In plain English
This ingredient is a type of plastic-like polymer that forms a thin, flexible film on your skin or hair. It's added to products like sunscreen and long-lasting makeup to help them stay in place longer and resist water or sweat. Think of it as a gentle, invisible glue that helps the product hold on, but it doesn't moisturize or treat your skin.
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
Maleated Hexene/Propylene 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 Maleated Hexene/Propylene 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 maleic anhydride-modified copolymer of hexene and propylene, created through a chemical process to produce a film-forming polymer.
How it works
When applied, the polymer molecules spread out and link together as the solvent (like water or alcohol) evaporates, leaving a continuous, flexible film on the skin or hair. This film acts as a barrier that slows down the removal of other ingredients by water or friction.
Pros
Boosts water resistance
Helps sunscreens and makeup stay effective longer when you sweat or swim, so you don't have to reapply as often.
Improves wear time
Creates a flexible film that keeps makeup from fading or transferring throughout the day.
Cons and cautions
No skin benefit
This ingredient is purely functional—it doesn't hydrate, soothe, or treat your skin in any way.
Potential tackiness
On some skin types, especially oily or combination, the film can feel slightly sticky or heavy.
Best for
- People who want long-wearing makeup or water-resistant sunscreen
- Those with normal to oily skin who don't mind a slight film feel
Use caution if
- People who prefer lightweight, minimal-ingredient routines
- Those with very sensitive skin that reacts to synthetic polymers
Usage tips
Safety summary
Maleated Hexene/Propylene Copolymer is considered safe for topical use at typical cosmetic concentrations. It has a low irritation and comedogenic risk, but it is a synthetic polymer with no active skin benefits.
Research notes
Limited independent research exists specifically on this polymer, but it is structurally similar to other maleated polyolefins used safely in cosmetics for decades. Safety assessments rely on its low skin penetration and lack of sensitization in standard tests.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the US (FDA) and EU (CosIng) with no specific concentration restrictions.
- Common uses
- Water-resistant sunscreens, Long-wear makeup, Hair styling products
- Environmental note
- As a synthetic polymer, it is not biodegradable and may contribute to microplastic pollution if washed down drains. Some brands are moving toward biodegradable alternatives.
Good to know
- This polymer is often used in combination with other film-formers to fine-tune the feel and durability of a product.
- It is considered safe for use in cosmetics at typical concentrations by major regulatory bodies.
Common questions
What is Maleated Hexene/Propylene Copolymer in beauty products?
This ingredient is a type of plastic-like polymer that forms a thin, flexible film on your skin or hair. It's added to products like sunscreen and long-lasting makeup to help them stay in place longer and resist water or sweat. Think of it as a gentle, invisible glue that helps the product hold on, but it doesn't moisturize or treat your skin.
What does Maleated Hexene/Propylene Copolymer do in a beauty product?
When applied, the polymer molecules spread out and link together as the solvent (like water or alcohol) evaporates, leaving a continuous, flexible film on the skin or hair. This film acts as a barrier that slows down the removal of other ingredients by water or friction.
Is Maleated Hexene/Propylene Copolymer safe for most people?
Maleated Hexene/Propylene Copolymer is considered safe for topical use at typical cosmetic concentrations. It has a low irritation and comedogenic risk, but it is a synthetic polymer with no active skin benefits.
Who should be careful with Maleated Hexene/Propylene Copolymer?
People who prefer lightweight, minimal-ingredient routines Those with very sensitive skin that reacts to synthetic polymers
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.