Ingredient review
Propylene Glycol Diricinoleate/IPDI Copolymer
INCI: PROPYLENE GLYCOL DIRICINOLEATE/IPDI COPOLYMER
A synthetic polymer that helps makeup and skincare stay put longer without feeling heavy or sticky.
In plain English
This is a man-made ingredient that forms a thin, flexible film on your skin. Think of it like an invisible, breathable shield that helps your foundation or sunscreen stay in place longer, resist sweat and water, and not settle into fine lines. It's commonly used in long-wear and waterproof 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
Propylene Glycol Diricinoleate/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 Propylene Glycol Diricinoleate/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 combining propylene glycol diricinoleate (a castor oil derivative) with isophorone diisocyanate (IPDI). The result is a flexible, non-tacky film-forming polymer.
How it works
When applied, the copolymer molecules link together as the solvent evaporates, forming a continuous, flexible film on the skin. This film physically locks in pigments and active ingredients, improving adhesion, water resistance, and wear time without clogging pores.
Pros
Long-lasting wear
Helps makeup and sunscreen stay intact for hours, even in humid or active conditions, so you don't need to reapply as often.
Non-comedogenic
Unlike some heavy waxes or oils, this polymer forms a thin film that does not clog pores, making it suitable for acne-prone skin.
Cons and cautions
Synthetic origin
Made from petrochemical-derived monomers, which may not align with clean or natural beauty preferences.
Potential tightness on dry skin
The film can feel slightly restrictive or drying if your skin barrier is compromised or if you have very dry skin.
Best for
- Anyone wanting long-wear foundation or waterproof mascara
- People with oily or combination skin who need extra staying power
Use caution if
- Those who prefer 100% natural or minimal-ingredient routines
- Individuals with very dry or dehydrated skin who may find film-formers uncomfortable
Usage tips
Safety summary
Considered safe for cosmetic use at typical concentrations. Low irritation and comedogenic potential. No significant safety concerns reported in regulatory reviews.
Research notes
Limited independent studies on this specific copolymer, but the broader class of film-forming polymers has a long history of safe use in cosmetics. Safety is supported by industry data and regulatory approvals.
Common label clues
- Typical concentration
- 1-10% in leave-on formulas
- 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, Sunscreens
- Environmental note
- As a synthetic polymer, it is not biodegradable. However, it is used in very small amounts and is not classified as a microplastic.
Good to know
- This polymer is often listed near the end of ingredient lists because it's used at low concentrations.
- It is not the same as microplastics; it forms a flexible film rather than solid particles.
Common questions
What is Propylene Glycol Diricinoleate/IPDI Copolymer in beauty products?
This is a man-made ingredient that forms a thin, flexible film on your skin. Think of it like an invisible, breathable shield that helps your foundation or sunscreen stay in place longer, resist sweat and water, and not settle into fine lines. It's commonly used in long-wear and waterproof products.
What does Propylene Glycol Diricinoleate/IPDI Copolymer do in a beauty product?
When applied, the copolymer molecules link together as the solvent evaporates, forming a continuous, flexible film on the skin. This film physically locks in pigments and active ingredients, improving adhesion, water resistance, and wear time without clogging pores.
Is Propylene Glycol Diricinoleate/IPDI Copolymer safe for most people?
Considered safe for cosmetic use at typical concentrations. Low irritation and comedogenic potential. No significant safety concerns reported in regulatory reviews.
Who should be careful with Propylene Glycol Diricinoleate/IPDI Copolymer?
Those who prefer 100% natural or minimal-ingredient routines Individuals with very dry or dehydrated skin who may find film-formers uncomfortable
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.