Ingredient review
Bis-HEA Polydiethyleneglycol Adipate/IPDI Copolymer
INCI: BIS-HEA POLYDIETHYLENEGLYCOL ADIPATE/IPDI COPOLYMER
A synthetic film-former that helps products stay put and resist water, but may feel heavy on some skin types.
In plain English
This ingredient is a type of plastic-like polymer that dries down to form a thin, flexible film on your skin or hair. It's what makes a sunscreen stay on after swimming or a mascara not smudge. Think of it like a clear, invisible raincoat for your makeup or skincare.
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-HEA Polydiethyleneglycol Adipate/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-HEA Polydiethyleneglycol Adipate/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 created by reacting adipic acid, diethylene glycol, and isophorone diisocyanate (IPDI) with hydroxyethyl acrylate (HEA). It belongs to the polyurethane family and is designed to form a durable, water-resistant film.
How it works
When applied, the polymer chains spread out and then link together as the solvent (usually water or alcohol) evaporates. This creates a continuous, flexible film that adheres to the skin or hair surface, locking in other ingredients and resisting removal by water or friction.
Pros
Excellent water resistance
Keeps sunscreen and makeup intact during swimming, sweating, or humid conditions, reducing the need for frequent reapplication.
Flexible film
Unlike some older film-formers, this polymer creates a film that moves with your skin, so it feels less stiff and crack-prone.
Cons and cautions
Can feel heavy
On dry or sensitive skin, the film may create a noticeable tight or heavy sensation, especially in high concentrations.
Requires double cleansing
Because it's water-resistant, a simple cleanser may not remove it completely; an oil-based first cleanse is often needed to avoid residue.
Best for
- People who need long-wear makeup or waterproof sunscreen
- Those with normal to oily skin looking for a matte finish
Use caution if
- Individuals with very dry or dehydrated skin who prefer lightweight, breathable textures
- Anyone who avoids synthetic polymers for personal or environmental reasons
Usage tips
Safety summary
Generally considered safe for topical use at typical concentrations. Rare reports of mild irritation or sensitivity, especially on compromised skin. No known systemic toxicity from cosmetic use.
Research notes
Safety data is based on analog studies of similar polyurethane copolymers. The CIR panel concluded these ingredients are safe when formulated to be non-irritating. No long-term human studies on this specific copolymer are publicly available.
Common label clues
- Typical concentration
- 1% to 10%
- Regulatory status
- Approved for use in cosmetics in the EU, USA, and many other regions. The Cosmetic Ingredient Review (CIR) panel has evaluated related polyurethane copolymers and found them safe as used.
- Common uses
- Sunscreens, Waterproof mascaras, Long-wear foundations, Hair styling products
- Environmental note
- As a synthetic polymer, it is not biodegradable and may contribute to microplastic pollution. Some manufacturers are exploring bio-based alternatives.
Good to know
- This ingredient is often listed under the broader category 'Polyurethane' on some product labels.
- It is not the same as polyurethane foam used in furniture; cosmetic-grade polyurethanes are specifically designed for skin safety.
Common questions
What is Bis-HEA Polydiethyleneglycol Adipate/IPDI Copolymer in beauty products?
This ingredient is a type of plastic-like polymer that dries down to form a thin, flexible film on your skin or hair. It's what makes a sunscreen stay on after swimming or a mascara not smudge. Think of it like a clear, invisible raincoat for your makeup or skincare.
What does Bis-HEA Polydiethyleneglycol Adipate/IPDI Copolymer do in a beauty product?
When applied, the polymer chains spread out and then link together as the solvent (usually water or alcohol) evaporates. This creates a continuous, flexible film that adheres to the skin or hair surface, locking in other ingredients and resisting removal by water or friction.
Is Bis-HEA Polydiethyleneglycol Adipate/IPDI Copolymer safe for most people?
Generally considered safe for topical use at typical concentrations. Rare reports of mild irritation or sensitivity, especially on compromised skin. No known systemic toxicity from cosmetic use.
Who should be careful with Bis-HEA Polydiethyleneglycol Adipate/IPDI Copolymer?
Individuals with very dry or dehydrated skin who prefer lightweight, breathable textures Anyone who avoids synthetic polymers for personal or environmental reasons
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.