Ingredient review
Alkyl Dimethicone Crosspolymer Blend
INCI: C4-24 Alkyl Dimethicone/Divinyldimethicone Crosspolymer
A silicone polymer that improves product feel and wear without clogging pores or causing irritation.
In plain English
This is a type of silicone that forms a thin, flexible film on your skin. It helps creams and lotions glide on smoothly, reduces that sticky or greasy feeling, and can make makeup last longer. Think of it as a lightweight, breathable veil that gives your skin a silky finish.
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
Alkyl Dimethicone Crosspolymer Blend 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 Alkyl Dimethicone Crosspolymer Blend.
- 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 made by combining alkyl dimethicone with divinyldimethicone. The crosslinking creates a network that gives it unique texture and film-forming properties.
How it works
When applied, it spreads into a thin, even layer that dries down to a soft, powdery-feeling film. This film helps other ingredients stay put, reduces water loss from the skin, and gives a smooth surface for makeup.
Pros
Silky, non-greasy finish
Leaves skin feeling smooth and velvety without any sticky or oily residue, making it ideal for primers and lightweight moisturizers.
Improves product longevity
The film it forms helps makeup and sunscreen stay in place longer, reducing the need for touch-ups throughout the day.
Cons and cautions
Not biodegradable
As a synthetic silicone polymer, it does not break down easily in the environment, which may be a concern for eco-conscious users.
Can require double cleansing
Because it forms a film, it may not rinse away fully with a gentle cleanser alone, so an oil-based cleanser might be needed for complete removal.
Best for
- Anyone who wants a smooth, velvety finish from their skincare or makeup
- People with oily or combination skin who dislike heavy, greasy textures
Use caution if
- Those who strictly avoid silicones in their routine
Usage tips
Safety summary
Extensively used in cosmetics with a strong safety record. Non-irritating, non-sensitizing, and non-comedogenic. No significant health concerns at typical use levels.
Research notes
Safety assessments by the Cosmetic Ingredient Review (CIR) panel have concluded that dimethicone crosspolymers are safe for use in cosmetics. Studies show low skin penetration and no toxicity.
Common label clues
- Typical concentration
- 1% to 10%
- Regulatory status
- Approved for use in cosmetics globally, including by the FDA (USA) and EU CosIng database, with no known restrictions.
- Common uses
- Moisturizers, Primers, Sunscreens, Foundations
- Environmental note
- Silicone polymers like this one are not biodegradable and can accumulate in the environment. Some brands are moving toward bio-based alternatives.
Good to know
- This ingredient is often used in 'blurring' primers because it fills in fine lines and pores for a smoother appearance.
- It is considered non-comedogenic and safe for most skin types, including acne-prone skin.
Common questions
What is Alkyl Dimethicone Crosspolymer Blend in beauty products?
This is a type of silicone that forms a thin, flexible film on your skin. It helps creams and lotions glide on smoothly, reduces that sticky or greasy feeling, and can make makeup last longer. Think of it as a lightweight, breathable veil that gives your skin a silky finish.
What does Alkyl Dimethicone Crosspolymer Blend do in a beauty product?
When applied, it spreads into a thin, even layer that dries down to a soft, powdery-feeling film. This film helps other ingredients stay put, reduces water loss from the skin, and gives a smooth surface for makeup.
Is Alkyl Dimethicone Crosspolymer Blend safe for most people?
Extensively used in cosmetics with a strong safety record. Non-irritating, non-sensitizing, and non-comedogenic. No significant health concerns at typical use levels.
Who should be careful with Alkyl Dimethicone Crosspolymer Blend?
Those who strictly avoid silicones in their routine
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.