Ingredient review
Glycerin Dimer Dilinoleate Copolymer
INCI: GLYCERIN/DIMER DILINOLEATE COPOLYMER
A gentle film-former that helps products stay put and feel smooth, without clogging pores or causing irritation.
In plain English
This ingredient is a polymer, which is a large molecule made by linking smaller units together. In cosmetics, it forms a thin, flexible film on your skin or hair. Think of it like a very lightweight, invisible glove that helps other ingredients stay in place and keeps moisture from escaping. It's often used in sunscreens to make them water-resistant and in makeup to help it last longer. Because it's made from glycerin (a common moisturizer) and a fatty acid, it's generally very gentle and unlikely to cause breakouts or 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
Glycerin Dimer Dilinoleate 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 Glycerin Dimer Dilinoleate 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 polymer created by reacting glycerin with dimer dilinoleic acid (a fatty acid derived from plant oils). The result is a large molecule that can spread into a thin, even film.
How it works
When applied, the polymer molecules align to form a continuous, breathable film on the skin or hair surface. This film helps to lock in moisture, improve the spreadability of other ingredients, and provide water resistance. It also adds a silky, non-greasy feel to formulations.
Pros
Gentle and non-irritating
Made from glycerin and plant-derived fatty acids, it has a very low irritation profile and is unlikely to cause redness or stinging, even on sensitive skin.
Boosts product performance
By forming a flexible film, it helps sunscreens maintain SPF protection longer during swimming or sweating, and helps makeup resist smudging and fading throughout the day.
Cons and cautions
May require double cleansing
Because it forms a water-resistant film, it may not rinse off completely with just water and a gentle cleanser. Using an oil-based cleanser first can ensure thorough removal and prevent buildup.
Can feel tight on very dry skin
If used in a high concentration without enough emollients, the film can create a slight tightening sensation on very dry or dehydrated skin, similar to a clay mask.
Best for
- Anyone looking for longer-lasting makeup or sunscreen
- People with oily or combination skin who want a matte finish
- Those who prefer water-resistant sun protection
Use caution if
- People who prefer completely water-soluble, rinse-off products
- Those with extremely sensitive skin that reacts to film-formers (rare)
Usage tips
Safety summary
Glycerin/Dimer Dilinoleate Copolymer is considered safe for use in cosmetics at typical concentrations. It has a low irritation and comedogenic risk, making it suitable for most skin types, including sensitive and acne-prone skin. No significant safety concerns have been reported in regulatory reviews.
Research notes
While not extensively studied in clinical trials on humans, the ingredient's safety is supported by its chemical structure (similar to other safe polyesters) and its long history of use in cosmetics. Regulatory bodies like the Cosmetic Ingredient Review (CIR) have reviewed similar polymers and found them safe. Its film-forming and water-resistance properties are well-documented in formulation science.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the EU, USA, and most other regions. No specific concentration restrictions are common.
- Common uses
- Moisturizers, Sunscreens, Long-wear makeup, Hair styling products
- Environmental note
- Derived from plant-based glycerin and dimer acid, it is considered more sustainable than fully petroleum-based polymers. It is not known to bioaccumulate.
Good to know
- This ingredient is often used in 'long-wear' or '24-hour' makeup foundations and eyeliners.
- It is considered biodegradable and is not a known environmental pollutant.
Common questions
What is Glycerin Dimer Dilinoleate Copolymer in beauty products?
This ingredient is a polymer, which is a large molecule made by linking smaller units together. In cosmetics, it forms a thin, flexible film on your skin or hair. Think of it like a very lightweight, invisible glove that helps other ingredients stay in place and keeps moisture from escaping. It's often used in sunscreens to make them water-resistant and in makeup to help it last longer. Because it's made from glycerin (a common moisturizer) and a fatty acid, it's generally very gentle and unlikely to cause breakouts or irritation.
What does Glycerin Dimer Dilinoleate Copolymer do in a beauty product?
When applied, the polymer molecules align to form a continuous, breathable film on the skin or hair surface. This film helps to lock in moisture, improve the spreadability of other ingredients, and provide water resistance. It also adds a silky, non-greasy feel to formulations.
Is Glycerin Dimer Dilinoleate Copolymer safe for most people?
Glycerin/Dimer Dilinoleate Copolymer is considered safe for use in cosmetics at typical concentrations. It has a low irritation and comedogenic risk, making it suitable for most skin types, including sensitive and acne-prone skin. No significant safety concerns have been reported in regulatory reviews.
Who should be careful with Glycerin Dimer Dilinoleate Copolymer?
People who prefer completely water-soluble, rinse-off products Those with extremely sensitive skin that reacts to film-formers (rare)
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.