Ingredient review
Glyceryl Stearate Dimer Dilinoleate Copolymer
INCI: GLYCERYL STEARATE DIMER DILINOLEATE COPOLYMER
A gentle film-forming ingredient that helps products feel smooth, stay put longer, and resist water without clogging pores.
In plain English
This ingredient is a polymer that forms a thin, flexible film on your skin. It helps your moisturizer or sunscreen spread evenly, feel silky, and stay in place longer—even when you sweat or get wet. Think of it like a very lightweight, invisible shield that doesn't clog pores or feel heavy.
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
Glyceryl Stearate 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 Glyceryl Stearate 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 made by combining glycerin, stearic acid (a fatty acid from plant oils), and dimer dilinoleic acid (derived from linoleic acid, a fatty acid found in safflower or sunflower oil). It is a large molecule that creates a film when applied to skin.
How it works
When applied, the polymer molecules link together to form a continuous, flexible film on the skin's surface. This film helps other ingredients stay evenly distributed, reduces water loss from the skin (acting as a mild occlusive), and improves the product's resistance to water and rubbing off.
Pros
Improves wear time
Creates a flexible film that helps makeup and sunscreen resist sweat, water, and rubbing, so you don't have to reapply as often.
Silky, non-greasy feel
Gives products a smooth, velvety texture without the heavy or sticky feeling some film-formers leave behind.
Cons and cautions
Can feel tacky on oily skin
In higher concentrations, the film may feel slightly sticky or heavy if you have very oily skin, especially in humid weather.
Not a standalone moisturizer
While it helps reduce water loss, it doesn't add hydration on its own—you still need humectants and emollients in your routine.
Best for
- Anyone looking for longer-lasting makeup or sunscreen
- People with normal to dry skin who want a smooth, non-greasy finish
Use caution if
- Those with extremely oily skin may prefer lighter film-formers like dimethicone
Usage tips
Safety summary
Glyceryl Stearate Dimer Dilinoleate Copolymer is considered safe for use in cosmetics. It has low irritation and comedogenic potential, and no significant safety concerns have been reported in clinical or regulatory reviews.
Research notes
Safety assessments by the Cosmetic Ingredient Review (CIR) panel and EU CosIng have concluded that this ingredient is safe at typical use concentrations. Studies focus on its film-forming and water-resistance properties, not on direct skin benefits beyond formulation performance.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics globally, including by the U.S. FDA and EU CosIng database, with no concentration restrictions.
- Common uses
- Moisturizers, Sunscreens, Foundations, Lip products, Eye makeup
- Environmental note
- As a semi-synthetic polymer, it is not readily biodegradable, but it is used in low concentrations and is not known to accumulate in the environment.
Good to know
- This ingredient is often used in 'water-resistant' sunscreens and long-wear foundations.
- It is considered safe and non-irritating by major cosmetic safety panels.
Common questions
What is Glyceryl Stearate Dimer Dilinoleate Copolymer in beauty products?
This ingredient is a polymer that forms a thin, flexible film on your skin. It helps your moisturizer or sunscreen spread evenly, feel silky, and stay in place longer—even when you sweat or get wet. Think of it like a very lightweight, invisible shield that doesn't clog pores or feel heavy.
What does Glyceryl Stearate Dimer Dilinoleate Copolymer do in a beauty product?
When applied, the polymer molecules link together to form a continuous, flexible film on the skin's surface. This film helps other ingredients stay evenly distributed, reduces water loss from the skin (acting as a mild occlusive), and improves the product's resistance to water and rubbing off.
Is Glyceryl Stearate Dimer Dilinoleate Copolymer safe for most people?
Glyceryl Stearate Dimer Dilinoleate Copolymer is considered safe for use in cosmetics. It has low irritation and comedogenic potential, and no significant safety concerns have been reported in clinical or regulatory reviews.
Who should be careful with Glyceryl Stearate Dimer Dilinoleate Copolymer?
Those with extremely oily skin may prefer lighter film-formers like dimethicone
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.