Ingredient review
Polyurea Crosspolymer-1
INCI: Polyurea Crosspolymer-1
A synthetic polymer that helps products stay put longer, but offers no active skincare benefit.
In plain English
Polyurea Crosspolymer-1 is a man-made ingredient that forms a thin, flexible film on your skin. This film helps other ingredients—like sunscreen or makeup—stay in place longer and resist water or sweat. Think of it like a gentle, invisible glue that holds your product where you put it. It doesn't moisturize or treat your skin; it's purely a performance booster for the formula.
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
Polyurea Crosspolymer-1 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 Polyurea Crosspolymer-1.
- 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 synthetic crosslinked polymer made from urea and other monomers, designed to create a flexible, water-resistant film on the skin.
How it works
When applied, the polymer chains spread out and link together as the solvent evaporates, forming a continuous film. This film physically locks in pigments, UV filters, or other active ingredients, reducing transfer and improving wear time.
Pros
Boosts wear time
Helps makeup and sunscreen stay in place for hours, reducing the need for frequent touch-ups.
Water-resistant
Creates a barrier that resists water and sweat, making it ideal for outdoor activities or humid conditions.
Cons and cautions
No active benefit
Does not moisturize, soothe, or treat the skin—it's purely a textural and performance ingredient.
Potential tightness
The film can feel slightly tight or dry on very sensitive or dehydrated skin, especially if layered heavily.
Best for
- Anyone wanting long-lasting makeup or sunscreen
- People who live in humid climates or sweat easily
Use caution if
- Those who prefer minimal-ingredient, water-only routines
Usage tips
Safety summary
Polyurea Crosspolymer-1 is considered safe for topical use. It is not absorbed into the skin and has a low potential for irritation or allergy. No significant safety concerns have been raised by regulatory panels.
Research notes
Research on this specific polymer is limited, but the broader class of crosspolymer film-formers has a long history of safe use in cosmetics. Studies focus on performance rather than biological activity.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the US, EU, and many other regions. No known restrictions at typical concentrations.
- Common uses
- Sunscreens, Long-wear foundations, Waterproof mascaras, Setting sprays
- Environmental note
- As a synthetic polymer, it is not biodegradable. However, it is used in small amounts and is not known to accumulate significantly in the environment.
Good to know
- Polyurea Crosspolymer-1 is often found in combination with other film-formers for extra durability.
- It is considered safe for use in cosmetics by major regulatory bodies.
Common questions
What is Polyurea Crosspolymer-1 in beauty products?
Polyurea Crosspolymer-1 is a man-made ingredient that forms a thin, flexible film on your skin. This film helps other ingredients—like sunscreen or makeup—stay in place longer and resist water or sweat. Think of it like a gentle, invisible glue that holds your product where you put it. It doesn't moisturize or treat your skin; it's purely a performance booster for the formula.
What does Polyurea Crosspolymer-1 do in a beauty product?
When applied, the polymer chains spread out and link together as the solvent evaporates, forming a continuous film. This film physically locks in pigments, UV filters, or other active ingredients, reducing transfer and improving wear time.
Is Polyurea Crosspolymer-1 safe for most people?
Polyurea Crosspolymer-1 is considered safe for topical use. It is not absorbed into the skin and has a low potential for irritation or allergy. No significant safety concerns have been raised by regulatory panels.
Who should be careful with Polyurea Crosspolymer-1?
Those who prefer minimal-ingredient, water-only routines
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.