Ingredient review
Octyldodecyl Dimer Dilinoleyl Alcohol/Succinic Acid Copolymer
INCI: Octyldodecyl Dimer Dilinoleyl Alcohol/Succinic Acid Copolymer
A synthetic film-former that helps makeup and sunscreen stay put longer without feeling heavy.
In plain English
This ingredient is a type of plastic-like polymer that creates a thin, flexible film on your skin. It's added to products like foundation, sunscreen, and lipstick to help them resist water, sweat, and smudging. Think of it as a clear, invisible shield that keeps your makeup in place without clogging pores or feeling 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
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Octyldodecyl Dimer Dilinoleyl Alcohol/Succinic Acid 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 Octyldodecyl Dimer Dilinoleyl Alcohol/Succinic Acid 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 octyldodecanol, dimer dilinoleic acid, and succinic acid. It forms a flexible film when applied to skin.
How it works
When the product dries, the polymer molecules link together into a continuous film that adheres to the skin. This film physically blocks water and oil from disturbing the product underneath, extending wear time and improving water resistance.
Pros
Long-lasting wear
Helps makeup and sunscreen stay intact for hours, even in humid or sweaty conditions, so you don't have to reapply as often.
Water resistance
Creates a barrier that repels water and sweat, making it ideal for swim-proof sunscreens and smudge-proof mascara.
Cons and cautions
Can feel tight
On very dry or dehydrated skin, the film may create a slight pulling or tightening sensation, which some find uncomfortable.
Removal challenge
Because it's designed to resist water, a regular cleanser may not fully remove it. You may need an oil-based or double-cleansing routine.
Best for
- Anyone wanting long-wearing makeup
- People who need water-resistant sunscreen
- Those with oily or combination skin
Use caution if
- People who prefer very lightweight, barely-there formulas
- Those with extremely dry or sensitive skin who find film-formers uncomfortable
Usage tips
Safety summary
Generally recognized as safe for topical use. Low irritation and comedogenic potential. No significant safety concerns at typical concentrations.
Research notes
Limited independent studies on this specific copolymer, but the class of film-forming polymers is well-studied and considered safe. Safety assessments rely on analog data from similar polymers.
Common label clues
- Typical concentration
- 1% to 10%
- Regulatory status
- Approved for use in cosmetics in the EU, US, and other major markets. No known restrictions at typical use levels.
- Common uses
- Long-wear foundations, Water-resistant sunscreens, Lip products, Mascara
- 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 polymer is often used in combination with other film-formers to fine-tune the feel and durability of a product.
- It is considered safe for use in cosmetics by major regulatory bodies.
Common questions
What is Octyldodecyl Dimer Dilinoleyl Alcohol/Succinic Acid Copolymer in beauty products?
This ingredient is a type of plastic-like polymer that creates a thin, flexible film on your skin. It's added to products like foundation, sunscreen, and lipstick to help them resist water, sweat, and smudging. Think of it as a clear, invisible shield that keeps your makeup in place without clogging pores or feeling sticky.
What does Octyldodecyl Dimer Dilinoleyl Alcohol/Succinic Acid Copolymer do in a beauty product?
When the product dries, the polymer molecules link together into a continuous film that adheres to the skin. This film physically blocks water and oil from disturbing the product underneath, extending wear time and improving water resistance.
Is Octyldodecyl Dimer Dilinoleyl Alcohol/Succinic Acid Copolymer safe for most people?
Generally recognized as safe for topical use. Low irritation and comedogenic potential. No significant safety concerns at typical concentrations.
Who should be careful with Octyldodecyl Dimer Dilinoleyl Alcohol/Succinic Acid Copolymer?
People who prefer very lightweight, barely-there formulas Those with extremely dry or sensitive skin who 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.