Ingredient review
Bis-HEMA Polycaprolactone Diol/IPDI Copolymer
INCI: BIS-HEMA POLYCAPROLACTONE DIOL/IPDI COPOLYMER
A synthetic film-former that helps makeup last longer and resist water, but offers no active skincare benefit.
In plain English
This is a man-made polymer that creates a flexible, invisible film on your skin. It helps makeup stay put, resist sweat and water, and feel less sticky. Think of it like a clear, breathable plastic wrap that holds your foundation or mascara in place. It doesn't moisturize or treat your skin—it's purely a performance ingredient.
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 Diol/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 Diol/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 (a methacrylate), polycaprolactone diol, and IPDI (isophorone diisocyanate). It belongs to the polyurethane family and is designed to form a durable, flexible film on skin or hair.
How it works
When the solvent (often water or alcohol) evaporates, the polymer chains link together into a continuous film. This film physically locks pigments and other ingredients onto the skin, improving wear time and water resistance. It also thickens the product slightly, giving a smooth, even application.
Pros
Excellent wear time
Creates a durable film that keeps makeup in place for hours, even in humid or sweaty conditions.
Water-resistant barrier
Helps products resist water and sweat, making it ideal for waterproof mascaras and long-wear foundations.
Cons and cautions
No skincare benefit
This ingredient is purely functional—it doesn't hydrate, soothe, or protect the skin in any way.
Can feel tight or dry
On dry or sensitive skin, the film may feel tight or uncomfortable, especially if used in high concentrations.
Best for
- Anyone wanting long-wearing, water-resistant makeup
- People with oily or combination skin who struggle with makeup fading
Use caution if
- Those with very dry or dehydrated skin who prefer hydrating, breathable formulas
Usage tips
Safety summary
Considered safe for cosmetic use at typical concentrations. Low irritation and comedogenic risk. No known toxicity or sensitization concerns in published safety reviews.
Research notes
Limited direct studies on this specific copolymer, but the broader polyurethane family has a long history of safe use in cosmetics. Safety is supported by industry self-regulation and ingredient databases.
Common label clues
- Typical concentration
- 1–10% in leave-on formulas
- Regulatory status
- Approved for use in cosmetics globally, including EU, US, and Japan. No specific restrictions at typical use levels.
- Common uses
- Long-wear foundations, Waterproof mascaras, Lip products, Sunscreens
- Environmental note
- As a synthetic polymer, it is not biodegradable. However, it is used in small amounts and is not considered a major environmental concern compared to microplastics.
Good to know
- This polymer is often used in 'clean' or 'water-free' formulations because it can replace some silicones.
- It is not a preservative, fragrance, or active ingredient—it's purely a texture and performance enhancer.
Common questions
What is Bis-HEMA Polycaprolactone Diol/IPDI Copolymer in beauty products?
This is a man-made polymer that creates a flexible, invisible film on your skin. It helps makeup stay put, resist sweat and water, and feel less sticky. Think of it like a clear, breathable plastic wrap that holds your foundation or mascara in place. It doesn't moisturize or treat your skin—it's purely a performance ingredient.
What does Bis-HEMA Polycaprolactone Diol/IPDI Copolymer do in a beauty product?
When the solvent (often water or alcohol) evaporates, the polymer chains link together into a continuous film. This film physically locks pigments and other ingredients onto the skin, improving wear time and water resistance. It also thickens the product slightly, giving a smooth, even application.
Is Bis-HEMA Polycaprolactone Diol/IPDI Copolymer safe for most people?
Considered safe for cosmetic use at typical concentrations. Low irritation and comedogenic risk. No known toxicity or sensitization concerns in published safety reviews.
Who should be careful with Bis-HEMA Polycaprolactone Diol/IPDI Copolymer?
Those with very dry or dehydrated skin who prefer hydrating, breathable formulas
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.