Ingredient review
Bis-HEMA Polycaprolactone/IPDI Copolymer
INCI: BIS-HEMA POLYCAPROLACTONE/IPDI COPOLYMER
A synthetic film-former that helps makeup last longer and resist water, but may feel heavy on very sensitive skin.
In plain English
This is a man-made polymer that creates a thin, flexible film on your skin or lashes. It helps makeup stay put longer and resist sweat, water, and smudging. Think of it like a clear, invisible shield that locks your makeup in place. It's commonly found in long-wear foundations, waterproof mascaras, and lip products.
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-HEMA Polycaprolactone/IPDI 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 Bis-HEMA Polycaprolactone/IPDI 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 HEMA (hydroxyethyl methacrylate), polycaprolactone, and IPDI (isophorone diisocyanate). It is designed to form a durable, flexible film on the skin or hair.
How it works
When applied, the polymer molecules link together as the solvent evaporates, creating a continuous, water-resistant film. This film adheres to the skin or lashes, helping pigments and other ingredients stay in place for hours.
Pros
Long-lasting wear
Creates a durable film that helps makeup stay intact for hours, even in humid or sweaty conditions.
Water and smudge resistance
Forms a barrier that resists water, sweat, and oil, reducing the need for touch-ups.
Cons and cautions
Can feel heavy or tight
On very dry or sensitive skin, the film may feel uncomfortable or cause a pulling sensation.
Requires double cleansing
Water-resistant films often need an oil-based cleanser or micellar water for thorough removal, which may be inconvenient.
Best for
- People who want long-wearing, transfer-resistant makeup
- Those with normal to oily skin looking for water-resistant formulas
Use caution if
- Individuals with very dry or sensitive skin who find film-formers uncomfortable
- Those who prefer easy, water-only makeup removal
Usage tips
Safety summary
Generally considered safe for cosmetic use at typical concentrations. Low irritation and comedogenic risk, but may cause discomfort on very sensitive or dry skin. No known systemic toxicity concerns from topical application.
Research notes
Limited peer-reviewed studies specifically on this copolymer, but it is structurally similar to other film-forming polymers with a long history of safe use in cosmetics. Safety assessments rely on analog data and industry experience.
Common label clues
- Typical concentration
- 1–10% in leave-on products
- Regulatory status
- Approved for use in cosmetics in the EU, US, and other major markets. No specific restrictions at typical use levels.
- Common uses
- Long-wear foundations, Waterproof mascaras, Lip products, Sunscreen formulations
- Environmental note
- As a synthetic polymer, it is not biodegradable and may persist in the environment. Some brands are moving toward biodegradable alternatives.
Good to know
- This ingredient is often listed near the end of an INCI list because it is used at low concentrations.
- It is not water-soluble, so it will not rinse off with water alone.
Common questions
What is Bis-HEMA Polycaprolactone/IPDI Copolymer in beauty products?
This is a man-made polymer that creates a thin, flexible film on your skin or lashes. It helps makeup stay put longer and resist sweat, water, and smudging. Think of it like a clear, invisible shield that locks your makeup in place. It's commonly found in long-wear foundations, waterproof mascaras, and lip products.
What does Bis-HEMA Polycaprolactone/IPDI Copolymer do in a beauty product?
When applied, the polymer molecules link together as the solvent evaporates, creating a continuous, water-resistant film. This film adheres to the skin or lashes, helping pigments and other ingredients stay in place for hours.
Is Bis-HEMA Polycaprolactone/IPDI Copolymer safe for most people?
Generally considered safe for cosmetic use at typical concentrations. Low irritation and comedogenic risk, but may cause discomfort on very sensitive or dry skin. No known systemic toxicity concerns from topical application.
Who should be careful with Bis-HEMA Polycaprolactone/IPDI Copolymer?
Individuals with very dry or sensitive skin who find film-formers uncomfortable Those who prefer easy, water-only makeup removal
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.