Ingredient review
Dimethicone/PEG-15 Crosspolymer
INCI: DIMETHICONE/PEG-15 CROSSPOLYMER
A silicone polymer that helps products feel silky and spread evenly without clogging pores.
In plain English
This is a man-made silicone ingredient that forms a thin, breathable film on your skin. It helps creams and lotions glide on smoothly, reduces stickiness, and can make makeup last longer. It's often used in primers and sunscreens to improve texture 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
Dimethicone/PEG-15 Crosspolymer 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 Dimethicone/PEG-15 Crosspolymer.
- 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 crosslinked silicone polymer combined with PEG (polyethylene glycol) chains, designed to create a flexible film on the skin.
How it works
When applied, it spreads into a uniform, non-greasy layer that holds other ingredients in place. The PEG portion adds water compatibility, so it can be used in water-based formulas without separating.
Pros
Silky texture
Creates a velvety, non-greasy feel that helps products apply evenly and reduces friction.
Water resistance
Forms a flexible film that helps sunscreens and makeup stay put longer, even in humid conditions.
Cons and cautions
Synthetic origin
Made from petrochemicals, which may be a concern for those seeking natural or biodegradable ingredients.
Potential heaviness
On very oily or acne-prone skin, the film-forming effect might feel occlusive or contribute to congestion in some individuals.
Best for
- People who want a smooth, primer-like finish
- Those using water-resistant sunscreens or long-wear makeup
Use caution if
- Those who prefer silicone-free or all-natural routines
- Very oily skin types that may find it too emollient
Usage tips
Safety summary
Considered safe for topical use in cosmetics at typical concentrations. Low irritation and comedogenic risk, but those with very sensitive or acne-prone skin should patch test first.
Research notes
Limited independent studies on this specific polymer, but silicones in general have a long history of safe use in cosmetics. The PEG component is well-tolerated at low concentrations.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics globally, including by the FDA (USA) and EU CosIng database, with no known restrictions at typical use levels.
- Common uses
- Moisturizers, Sunscreens, Primers, Color cosmetics
- Environmental note
- Silicones like this are not biodegradable and can accumulate in the environment. Some manufacturers are moving toward bio-based alternatives.
Good to know
- PEG-15 indicates the polymer has 15 ethylene oxide units, making it more water-friendly than plain dimethicone
- It is often used in 'silicone-based' primers and long-wear foundations
Common questions
What is Dimethicone/PEG-15 Crosspolymer in beauty products?
This is a man-made silicone ingredient that forms a thin, breathable film on your skin. It helps creams and lotions glide on smoothly, reduces stickiness, and can make makeup last longer. It's often used in primers and sunscreens to improve texture and water resistance.
What does Dimethicone/PEG-15 Crosspolymer do in a beauty product?
When applied, it spreads into a uniform, non-greasy layer that holds other ingredients in place. The PEG portion adds water compatibility, so it can be used in water-based formulas without separating.
Is Dimethicone/PEG-15 Crosspolymer safe for most people?
Considered safe for topical use in cosmetics at typical concentrations. Low irritation and comedogenic risk, but those with very sensitive or acne-prone skin should patch test first.
Who should be careful with Dimethicone/PEG-15 Crosspolymer?
Those who prefer silicone-free or all-natural routines Very oily skin types that may find it too emollient
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.