Ingredient review
Polyglyceryl-2 Diisostearate/IPDI Copolymer
INCI: POLYGLYCERYL-2 DIISOSTEARATE/IPDI COPOLYMER
A film-forming polymer that helps makeup and sunscreen stay put longer, especially in water-resistant formulas.
In plain English
This ingredient is a type of plastic-like polymer that spreads into a thin, flexible film on your skin. It is used in products like long-wear foundation and waterproof mascara to help them resist sweat, water, and rubbing. Think of it as a clear, invisible shield that keeps the product in place without feeling heavy or sticky.
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
- semi synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Polyglyceryl-2 Diisostearate/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 Polyglyceryl-2 Diisostearate/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 by reacting polyglyceryl-2 diisostearate (a mild emulsifier derived from glycerin and fatty acids) with isophorone diisocyanate (IPDI), a building block used to create flexible films. The result is a polymer that forms a durable yet flexible layer on the skin.
How it works
When applied, the copolymer molecules link together as the solvent (water or oil) evaporates, creating a continuous film. This film physically locks pigment and active ingredients onto the skin, reducing transfer and improving water resistance. It also thickens the product slightly, giving a smooth, even application.
Pros
Boosts wear time
Helps foundation and concealer stay intact for hours, reducing the need for touch-ups.
Water-resistant
Forms a barrier that resists sweat and humidity, ideal for active days or humid climates.
Cons and cautions
Removal can be tricky
Because it forms a strong film, you may need an oil-based or dual-phase cleanser to fully remove it without rubbing.
May feel drying
On very dry or sensitive skin, the film can feel slightly tight or emphasize dry patches.
Best for
- Anyone wanting long-lasting makeup or water-resistant sunscreen
- People with oily or combination skin who struggle with makeup fading
Use caution if
- Those who prefer lightweight, breathable formulas and dislike any film-forming feel
- Individuals with very dry or compromised skin barriers who may find it too occlusive
Usage tips
Safety summary
Polyglyceryl-2 Diisostearate/IPDI Copolymer has a low irritation and comedogenic risk. It is well-tolerated by most skin types, though those with very sensitive or dry skin may notice a slight film feel. No significant safety concerns have been reported in cosmetic use.
Research notes
Research on this specific copolymer is limited, but it belongs to a well-studied class of polyurethane film-formers used in cosmetics for decades. Safety assessments by the Cosmetic Ingredient Review (CIR) and EU SCCS have found similar polymers safe at typical use levels.
Common label clues
- Typical concentration
- 1% to 10%
- Regulatory status
- Approved for use in cosmetics in the EU, US, and other major markets. The IPDI component is fully reacted and not considered a free isocyanate hazard in the final product.
- Common uses
- Long-wear foundations, Waterproof mascaras, Sunscreens, Lip products
- Environmental note
- As a synthetic polymer, it is not biodegradable. However, it is used in small amounts and is not known to bioaccumulate significantly.
Good to know
- This ingredient is often combined with other film-formers to fine-tune flexibility and water resistance.
- It is considered safe for use in cosmetics by major regulatory bodies at typical concentrations.
Common questions
What is Polyglyceryl-2 Diisostearate/IPDI Copolymer in beauty products?
This ingredient is a type of plastic-like polymer that spreads into a thin, flexible film on your skin. It is used in products like long-wear foundation and waterproof mascara to help them resist sweat, water, and rubbing. Think of it as a clear, invisible shield that keeps the product in place without feeling heavy or sticky.
What does Polyglyceryl-2 Diisostearate/IPDI Copolymer do in a beauty product?
When applied, the copolymer molecules link together as the solvent (water or oil) evaporates, creating a continuous film. This film physically locks pigment and active ingredients onto the skin, reducing transfer and improving water resistance. It also thickens the product slightly, giving a smooth, even application.
Is Polyglyceryl-2 Diisostearate/IPDI Copolymer safe for most people?
Polyglyceryl-2 Diisostearate/IPDI Copolymer has a low irritation and comedogenic risk. It is well-tolerated by most skin types, though those with very sensitive or dry skin may notice a slight film feel. No significant safety concerns have been reported in cosmetic use.
Who should be careful with Polyglyceryl-2 Diisostearate/IPDI Copolymer?
Those who prefer lightweight, breathable formulas and dislike any film-forming feel Individuals with very dry or compromised skin barriers who may find it too occlusive
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.