Ingredient review
Bis-Dodecylhexadecyl Dimer Dilinoleate/Propanediol Copolymer
INCI: BIS-DODECYLHEXADECYL DIMER DILINOLEATE/PROPANEDIOL COPOLYMER
A gentle film-forming polymer that helps skincare and makeup stay put without feeling heavy.
In plain English
This ingredient is a type of polymer—a long chain of molecules—that forms a thin, flexible film on your skin. It's often added to sunscreens and long-wear makeup to help them resist water, sweat, and rubbing off. Think of it like a clear, breathable shield that keeps the product in place without clogging pores or causing irritation.
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
Bis-Dodecylhexadecyl Dimer Dilinoleate/Propanediol 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-Dodecylhexadecyl Dimer Dilinoleate/Propanediol 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 semi-synthetic copolymer made from dimer dilinoleic acid (derived from plant oils) and propanediol (a plant-based glycol). It is designed to create a uniform, water-resistant film on the skin.
How it works
When applied, the copolymer molecules link together to form a continuous, flexible layer on the skin's surface. This film physically blocks water and oil from breaking down the product underneath, while also helping other ingredients spread evenly and stay where they're applied.
Pros
Boosts wear time
Creates a flexible film that helps your sunscreen or foundation resist sweat, water, and transfer, so you need fewer touch-ups.
Gentle on skin
Made from plant-derived sources and has a very low irritation and comedogenic risk, making it suitable for sensitive and acne-prone skin.
Cons and cautions
May feel tight
On very dry or dehydrated skin, the film can create a slight tightening sensation, which some find uncomfortable.
Requires double cleansing
Because it's water-resistant, a simple water-based cleanser may not remove it fully; an oil-based or balm cleanser is often needed.
Best for
- Anyone looking for longer-lasting sunscreen or makeup
- People with oily or combination skin who want a matte finish
Use caution if
- Those who prefer minimal, lightweight routines and dislike any film-like feel
Usage tips
Safety summary
Considered safe for use in cosmetics at typical concentrations. It has a low irritation and comedogenic profile, and no significant safety concerns have been raised by regulatory bodies or dermatological reviews.
Research notes
Limited independent clinical studies exist specifically on this copolymer, but it is chemically similar to other well-studied film-formers used in sunscreens and long-wear cosmetics. Its safety is supported by its widespread use and low reported irritation.
Common label clues
- Typical concentration
- 1% to 5%
- Regulatory status
- Approved for use in cosmetics globally, including by the EU CosIng database and the US FDA as a cosmetic ingredient. No concentration restrictions are typically imposed.
- Common uses
- Sunscreens, Waterproof makeup, Long-wear foundations, Lip products
- Environmental note
- Propanediol is often derived from corn or sugarcane, making this copolymer partially plant-based. However, the full environmental impact of its production and biodegradability is not well-documented.
Good to know
- This ingredient is often listed near the end of an ingredient list because it's used in low concentrations.
- It is not a sunscreen active ingredient—it only helps the sunscreen stay on your skin longer.
Common questions
What is Bis-Dodecylhexadecyl Dimer Dilinoleate/Propanediol Copolymer in beauty products?
This ingredient is a type of polymer—a long chain of molecules—that forms a thin, flexible film on your skin. It's often added to sunscreens and long-wear makeup to help them resist water, sweat, and rubbing off. Think of it like a clear, breathable shield that keeps the product in place without clogging pores or causing irritation.
What does Bis-Dodecylhexadecyl Dimer Dilinoleate/Propanediol Copolymer do in a beauty product?
When applied, the copolymer molecules link together to form a continuous, flexible layer on the skin's surface. This film physically blocks water and oil from breaking down the product underneath, while also helping other ingredients spread evenly and stay where they're applied.
Is Bis-Dodecylhexadecyl Dimer Dilinoleate/Propanediol Copolymer safe for most people?
Considered safe for use in cosmetics at typical concentrations. It has a low irritation and comedogenic profile, and no significant safety concerns have been raised by regulatory bodies or dermatological reviews.
Who should be careful with Bis-Dodecylhexadecyl Dimer Dilinoleate/Propanediol Copolymer?
Those who prefer minimal, lightweight routines and dislike any film-like feel
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.