Ingredient review
Dimer Dilinoleyl Dimer Dilinoleate/IPDI Copolymer
INCI: DIMER DILINOLEYL DIMER DILINOLEATE/IPDI COPOLYMER
A synthetic polymer that helps makeup and skincare stay put without feeling heavy or greasy.
In plain English
This ingredient is a type of plastic-like polymer that forms a thin, flexible film on your skin. It's used to make makeup last longer, resist water and sweat, and keep active ingredients from rubbing off. Think of it as an invisible, breathable shield that helps your products stay where you put them.
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
Dimer Dilinoleyl Dimer Dilinoleate/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 Dimer Dilinoleyl Dimer Dilinoleate/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 dimer dilinoleic acid (derived from plant oils) and isophorone diisocyanate (IPDI). It is a high-molecular-weight polymer designed to create a durable, flexible film on the skin.
How it works
When applied, the polymer molecules link together to form a continuous, invisible film on the skin's surface. This film physically locks in pigments and active ingredients, reduces transfer, and provides a water-resistant barrier. It also helps control the viscosity of the product for a smooth, even application.
Pros
Long-lasting wear
Creates a flexible film that helps makeup and skincare resist smudging, fading, and transfer for hours.
Water and sweat resistant
Forms a protective barrier that keeps products intact even in humid or active conditions.
Cons and cautions
Synthetic origin
Made from chemical synthesis, which may not align with natural or minimalist skincare preferences.
Potential tightness
In high concentrations, the film can feel slightly tight or dry on very sensitive or dehydrated skin.
Best for
- Anyone who wants long-lasting makeup that doesn't smudge or fade
- People who need water-resistant sunscreens or active skincare that stays put through sweat
Use caution if
- Those with a strong preference for 100% natural or plant-only ingredients
Usage tips
Safety summary
Dimer Dilinoleyl Dimer Dilinoleate/IPDI Copolymer is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, and no significant safety concerns have been reported in regulatory reviews.
Research notes
Evidence is based on industry safety assessments and regulatory approvals. No peer-reviewed human studies specifically on this polymer were found, but it is structurally similar to other well-studied film-forming polymers with a strong safety profile.
Common label clues
- Typical concentration
- 1% to 10% in leave-on products
- Regulatory status
- Approved for use in cosmetics globally, including by the FDA (US) and EU CosIng database. No known restrictions at typical use levels.
- Common uses
- Long-wear foundations, Lip products, Water-resistant sunscreens, Eye makeup
- Environmental note
- As a synthetic polymer, it is not biodegradable. However, it is used in very low concentrations and is not known to bioaccumulate.
Good to know
- This polymer is often listed near the end of ingredient lists because it's used in small amounts.
- It is considered non-comedogenic and generally safe for most skin types.
Common questions
What is Dimer Dilinoleyl Dimer Dilinoleate/IPDI Copolymer in beauty products?
This ingredient is a type of plastic-like polymer that forms a thin, flexible film on your skin. It's used to make makeup last longer, resist water and sweat, and keep active ingredients from rubbing off. Think of it as an invisible, breathable shield that helps your products stay where you put them.
What does Dimer Dilinoleyl Dimer Dilinoleate/IPDI Copolymer do in a beauty product?
When applied, the polymer molecules link together to form a continuous, invisible film on the skin's surface. This film physically locks in pigments and active ingredients, reduces transfer, and provides a water-resistant barrier. It also helps control the viscosity of the product for a smooth, even application.
Is Dimer Dilinoleyl Dimer Dilinoleate/IPDI Copolymer safe for most people?
Dimer Dilinoleyl Dimer Dilinoleate/IPDI Copolymer is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, and no significant safety concerns have been reported in regulatory reviews.
Who should be careful with Dimer Dilinoleyl Dimer Dilinoleate/IPDI Copolymer?
Those with a strong preference for 100% natural or plant-only ingredients
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.