Ingredient review
Bis-Ethylhexyl Polycaprolactone/IPDI Copolymer Succinate
INCI: BIS-ETHYLHEXYL POLY(CAPROLACTONE/PENTAERYTHRITOL)/IPDI COPOLYMER SUCCINATE
A synthetic polymer that helps products stay put without feeling overly stiff or heavy.
In plain English
This is a man-made ingredient that forms a thin, flexible film on your skin or hair. Think of it like a clear, breathable wrap that helps makeup last longer or keeps hair in place without flaking. It's often used in products that need to resist water or sweat.
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
Bis-Ethylhexyl Polycaprolactone/IPDI Copolymer Succinate 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 Bis-Ethylhexyl Polycaprolactone/IPDI Copolymer Succinate.
- 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 derived from caprolactone, pentaerythritol, and isophorone diisocyanate (IPDI), modified with succinate and ethylhexyl groups. It is designed to be a high-performance film former.
How it works
When applied, the polymer chains spread out and link together as the solvent evaporates, creating a continuous, flexible film. This film helps other ingredients (like pigments or UV filters) adhere to the skin or hair, improving wear time and water resistance.
Pros
Long-lasting wear
Creates a flexible film that helps makeup and sunscreen stay put for hours, even in humid or wet conditions.
Comfortable feel
Unlike some older film formers, this polymer is designed to be flexible, so it doesn't crack or feel stiff on the skin.
Cons and cautions
Removal difficulty
Because it's water-resistant, you may need an oil-based cleanser or micellar water to fully remove products containing this ingredient.
Potential tightness
On very dry or dehydrated skin, the film can create a slight tightening sensation, which some people find uncomfortable.
Best for
- Anyone wanting long-wearing makeup
- People who need water-resistant sunscreen
- Those with normal to oily skin
Use caution if
- People who prefer minimal, easily removable makeup
- Those with very sensitive skin who react to film formers
Usage tips
Safety summary
Generally considered safe for topical use at typical concentrations. The ingredient is not a known irritant or sensitizer, but as with any film former, individual reactions are possible. It is not absorbed through the skin in significant amounts.
Research notes
There are no large-scale human studies specifically on this exact polymer, but it is chemically similar to other polyurethane and polyester film formers that have a long history of safe use in cosmetics. Safety assessments rely on analog data and the ingredient's large molecular size, which limits skin penetration.
Common label clues
- Typical concentration
- 1% to 10%
- Regulatory status
- Approved for use in cosmetics in the EU, US, and other major markets. No specific concentration restrictions are common, but it must be used according to good manufacturing practices.
- Common uses
- Long-wear foundations, Waterproof mascaras, Sunscreens, Hair styling products
- Environmental note
- As a synthetic polymer, its biodegradability is limited. It may contribute to microplastic pollution if not filtered out during wastewater treatment.
Good to know
- This ingredient is part of a newer generation of film formers designed to be more flexible and less brittle than older acrylic-based polymers.
- It is often found in 'clean' or 'high-performance' makeup brands that want long wear without heavy silicones.
Common questions
What is Bis-Ethylhexyl Polycaprolactone/IPDI Copolymer Succinate in beauty products?
This is a man-made ingredient that forms a thin, flexible film on your skin or hair. Think of it like a clear, breathable wrap that helps makeup last longer or keeps hair in place without flaking. It's often used in products that need to resist water or sweat.
What does Bis-Ethylhexyl Polycaprolactone/IPDI Copolymer Succinate do in a beauty product?
When applied, the polymer chains spread out and link together as the solvent evaporates, creating a continuous, flexible film. This film helps other ingredients (like pigments or UV filters) adhere to the skin or hair, improving wear time and water resistance.
Is Bis-Ethylhexyl Polycaprolactone/IPDI Copolymer Succinate safe for most people?
Generally considered safe for topical use at typical concentrations. The ingredient is not a known irritant or sensitizer, but as with any film former, individual reactions are possible. It is not absorbed through the skin in significant amounts.
Who should be careful with Bis-Ethylhexyl Polycaprolactone/IPDI Copolymer Succinate?
People who prefer minimal, easily removable makeup Those with very sensitive skin who react to film formers
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.