Ingredient review
Dilinoleyl Alcohol/IPDI Copolymer
INCI: DILINOLEYL ALCOHOL/IPDI COPOLYMER
A synthetic film-former that helps makeup and skincare last longer without feeling heavy or sticky.
In plain English
This ingredient is a type of polymer that creates a thin, flexible film on your skin. Think of it like an invisible, breathable shield that helps makeup stay put and keeps moisturizing ingredients from evaporating too quickly. It's commonly found in long-wear foundations, waterproof mascaras, and sunscreens to improve durability and water resistance.
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
Dilinoleyl Alcohol/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 Dilinoleyl Alcohol/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 dilinoleyl alcohol and isophorone diisocyanate (IPDI). It is designed to form a flexible, water-resistant film on the skin or hair.
How it works
When applied, the polymer molecules link together to create a continuous, flexible film. This film adheres to the skin or hair, locking in other ingredients and resisting water, sweat, and friction. It also helps control the viscosity (thickness) of the product for a smooth, even application.
Pros
Long-lasting wear
Helps makeup and skincare resist fading, smudging, and transferring throughout the day.
Water and sweat resistant
Creates a protective barrier that keeps products intact even in humid or active conditions.
Cons and cautions
Synthetic origin
Not derived from natural sources, which may be a drawback for consumers seeking clean or natural beauty products.
Potential tightness on dry skin
In high concentrations, the film can feel slightly tight or dry on very dry or dehydrated skin types.
Best for
- Anyone wanting long-lasting makeup or sunscreen
- People with oily or combination skin who need extra staying power
Use caution if
- Those who prefer exclusively natural or plant-based ingredients
Usage tips
Safety summary
Dilinoleyl Alcohol/IPDI Copolymer is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential. Some individuals with very sensitive skin may experience mild tightness if used in high amounts.
Research notes
There is limited published research specifically on this copolymer, but it is structurally similar to other film-forming polymers that have been extensively evaluated for safety and efficacy. Regulatory panels (e.g., CIR) have reviewed related ingredients and found them safe for cosmetic use.
Common label clues
- Typical concentration
- 1% to 10%
- Regulatory status
- Approved for use in cosmetics in the EU, US, and many other regions. No known 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 known to accumulate in the environment.
Good to know
- This ingredient is often used in combination with other film-formers for a balanced feel.
- It is considered safe for use in cosmetics by major regulatory bodies.
Common questions
What is Dilinoleyl Alcohol/IPDI Copolymer in beauty products?
This ingredient is a type of polymer that creates a thin, flexible film on your skin. Think of it like an invisible, breathable shield that helps makeup stay put and keeps moisturizing ingredients from evaporating too quickly. It's commonly found in long-wear foundations, waterproof mascaras, and sunscreens to improve durability and water resistance.
What does Dilinoleyl Alcohol/IPDI Copolymer do in a beauty product?
When applied, the polymer molecules link together to create a continuous, flexible film. This film adheres to the skin or hair, locking in other ingredients and resisting water, sweat, and friction. It also helps control the viscosity (thickness) of the product for a smooth, even application.
Is Dilinoleyl Alcohol/IPDI Copolymer safe for most people?
Dilinoleyl Alcohol/IPDI Copolymer is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential. Some individuals with very sensitive skin may experience mild tightness if used in high amounts.
Who should be careful with Dilinoleyl Alcohol/IPDI Copolymer?
Those who prefer exclusively natural or plant-based 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.