Ingredient review
Acrylates Crosspolymer
INCI: ACRYLATES/TRIMETHYLSILOXYPROPYL METHACRYLATE CROSSPOLYMER
A silicone-based film former that improves water resistance and wear time, generally safe but may feel heavy on some skin types.
In plain English
This is a synthetic ingredient that forms a thin, flexible film on your skin or hair. It helps products like sunscreen or foundation stay put longer, resist water and sweat, and feel smooth. Think of it as a gentle, invisible shield that locks in the product without clogging pores for most people.
Quick decision guide
Useful, but context matters
Acrylates 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 Acrylates 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 polymer made from acrylic acid derivatives and a silicone-containing monomer. It is a synthetic, high-molecular-weight compound designed to create a durable, water-resistant film.
How it works
When applied, the polymer chains spread into a thin, even layer. As the solvent (water or alcohol) evaporates, the chains crosslink into a flexible, breathable film that adheres to skin or hair. This film physically blocks water and oil from disturbing the product underneath, enhancing longevity and water resistance.
Pros
Boosts water resistance
Helps sunscreen and makeup stay effective even when you sweat or swim, so you don't have to reapply as often.
Smooth, even finish
Creates a silky, non-greasy layer that helps foundation and tinted moisturizers glide on and stay put without caking.
Cons and cautions
Can feel heavy
On dry or sensitive skin, the film may feel tight or uncomfortable, especially if layered under multiple products.
Requires double cleansing
Because it forms a water-resistant barrier, a simple rinse won't remove it fully. You'll likely need an oil-based cleanser or micellar water to break it down.
Best for
- People who need long-lasting, water-resistant sunscreen or makeup
- Those with oily or combination skin who want a matte, stay-put finish
Use caution if
- Individuals with very dry or dehydrated skin who prefer lightweight, breathable formulas
- Anyone using a minimal or oil-free cleansing routine, as this polymer can be stubborn to remove
Usage tips
Safety summary
Acrylates/Trimethylsiloxypropyl Methacrylate Crosspolymer is considered safe for cosmetic use at typical concentrations. It has low irritation and comedogenic potential. The main practical concern is that it may feel heavy on dry skin and requires thorough cleansing to remove.
Research notes
Safety assessments by the Cosmetic Ingredient Review (CIR) panel have concluded that acrylates crosspolymers are safe when formulated to be non-irritating. No significant systemic toxicity or sensitization has been reported in published studies.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the US (FDA), EU (CosIng), and many other regions. No concentration restrictions are typically imposed.
- Common uses
- Sunscreens, Long-wear foundations, Waterproof mascaras, Hair styling products
- Environmental note
- As a synthetic silicone-based polymer, it is not biodegradable. However, it is used in low concentrations and is not known to bioaccumulate significantly.
Good to know
- This ingredient is often listed near the end of an ingredient list because it's used in small amounts.
- It is considered non-comedogenic for most people, but if you are prone to clogged pores, patch test first.
Common questions
What is Acrylates Crosspolymer in beauty products?
This is a synthetic ingredient that forms a thin, flexible film on your skin or hair. It helps products like sunscreen or foundation stay put longer, resist water and sweat, and feel smooth. Think of it as a gentle, invisible shield that locks in the product without clogging pores for most people.
What does Acrylates Crosspolymer do in a beauty product?
When applied, the polymer chains spread into a thin, even layer. As the solvent (water or alcohol) evaporates, the chains crosslink into a flexible, breathable film that adheres to skin or hair. This film physically blocks water and oil from disturbing the product underneath, enhancing longevity and water resistance.
Is Acrylates Crosspolymer safe for most people?
Acrylates/Trimethylsiloxypropyl Methacrylate Crosspolymer is considered safe for cosmetic use at typical concentrations. It has low irritation and comedogenic potential. The main practical concern is that it may feel heavy on dry skin and requires thorough cleansing to remove.
Who should be careful with Acrylates Crosspolymer?
Individuals with very dry or dehydrated skin who prefer lightweight, breathable formulas Anyone using a minimal or oil-free cleansing routine, as this polymer can be stubborn to remove
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.