Ingredient review
Polysilicone-1 Crosspolymer
INCI: Polysilicone-1 Crosspolymer
A gentle silicone polymer that creates a smooth, velvety feel on skin and helps products spread evenly without clogging pores.
In plain English
Polysilicone-1 Crosspolymer is a type of silicone that forms a thin, flexible film on your skin. It's often added to makeup primers, sunscreens, and moisturizers to give them a silky, smooth texture and help them glide on easily. Because it's a crosspolymer (meaning its molecules are linked together in a network), it stays put on the skin's surface without being absorbed, which helps other ingredients stay in place and can improve water resistance. It's considered very gentle and unlikely to cause irritation or breakouts for most people.
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
Polysilicone-1 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 Polysilicone-1 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
Polysilicone-1 Crosspolymer is a synthetic silicone polymer made by crosslinking silicone chains. It is a fine, white powder that is dispersed in liquids to create a smooth, velvety feel.
How it works
When applied to the skin, the crosslinked silicone network forms a flexible, breathable film. This film helps other ingredients spread evenly, reduces the appearance of fine lines by filling in uneven texture, and can provide a light, non-greasy barrier that improves water resistance in sunscreens and long-wear makeup.
Pros
Smooth, velvety finish
Creates a soft-focus effect on skin, minimizing the look of pores and fine lines without feeling heavy or sticky.
Enhances product performance
Helps sunscreens and makeup spread evenly and stay in place longer, improving overall user experience and efficacy.
Cons and cautions
Not water-soluble
Requires an oil-based or double-cleansing routine to fully remove, which may be inconvenient for some users.
Silicone concerns
Some consumers avoid silicones due to environmental persistence or personal preference, even though this ingredient is considered safe for skin.
Best for
- Anyone looking for a smooth, velvety finish in primers or foundations
- People with oily or combination skin who want a matte, non-greasy feel
Use caution if
- Those who strictly avoid silicones in their skincare routine
Usage tips
Safety summary
Polysilicone-1 Crosspolymer is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, and is well-tolerated by most skin types, including sensitive skin.
Research notes
Safety assessments by the Cosmetic Ingredient Review (CIR) panel have concluded that silicone crosspolymers are safe as used in cosmetics. Individual studies on Polysilicone-1 Crosspolymer specifically are limited, but its chemical class is well-studied and considered low-risk.
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 known restrictions.
- Common uses
- Primers, Sunscreens, Color Cosmetics, Moisturizers
- Environmental note
- Silicones like this one are not biodegradable and may accumulate in the environment. Some regions are exploring restrictions on certain silicones, though Polysilicone-1 Crosspolymer is not currently targeted.
Good to know
- Polysilicone-1 Crosspolymer is often used in combination with other silicones to achieve a specific texture.
- It is considered non-comedogenic and safe for sensitive skin by most dermatological sources.
Common questions
What is Polysilicone-1 Crosspolymer in beauty products?
Polysilicone-1 Crosspolymer is a type of silicone that forms a thin, flexible film on your skin. It's often added to makeup primers, sunscreens, and moisturizers to give them a silky, smooth texture and help them glide on easily. Because it's a crosspolymer (meaning its molecules are linked together in a network), it stays put on the skin's surface without being absorbed, which helps other ingredients stay in place and can improve water resistance. It's considered very gentle and unlikely to cause irritation or breakouts for most people.
What does Polysilicone-1 Crosspolymer do in a beauty product?
When applied to the skin, the crosslinked silicone network forms a flexible, breathable film. This film helps other ingredients spread evenly, reduces the appearance of fine lines by filling in uneven texture, and can provide a light, non-greasy barrier that improves water resistance in sunscreens and long-wear makeup.
Is Polysilicone-1 Crosspolymer safe for most people?
Polysilicone-1 Crosspolymer is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, and is well-tolerated by most skin types, including sensitive skin.
Who should be careful with Polysilicone-1 Crosspolymer?
Those who strictly avoid silicones in their skincare 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.