Ingredient review
Acrylates/Stearyl Methacrylate/VP Copolymer
INCI: ACRYLATES/STEARYL METHACRYLATE/VP COPOLYMER
A synthetic film-former that improves water resistance and wear time in makeup and sunscreens, generally considered safe and non-irritating.
In plain English
This ingredient is a synthetic polymer that dries down to form a flexible, invisible film on your skin or hair. Think of it like a very thin, breathable plastic wrap that helps other ingredients stay put longer. It's commonly used in sunscreens to keep the SPF from washing off, in foundations to help them last all day, and in mascaras to prevent smudging. It also helps thicken a product's texture so it feels more luxurious.
Quick decision guide
Useful, but context matters
Acrylates/Stearyl Methacrylate/VP Copolymer 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/Stearyl Methacrylate/VP Copolymer.
- 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 copolymer made from acrylic acid, stearyl methacrylate (a fatty alcohol derivative), and vinylpyrrolidone. It is a white powder or granular solid that is dispersed in water or oil to form a film.
How it works
When the product is applied and the water or solvent evaporates, the polymer chains link together to form a continuous, flexible film. This film physically locks in pigments, UV filters, and other active ingredients, improving water resistance, wear time, and texture. It also slightly thickens the formula, giving it a richer feel.
Pros
Boosts wear time
Creates a flexible film that helps makeup and sunscreen stay in place for hours, reducing the need for frequent touch-ups.
Enhances water resistance
Forms a barrier that prevents water and sweat from washing away SPF or pigment, making it ideal for beach days or active use.
Cons and cautions
Synthetic origin
As a petroleum-derived polymer, it may not fit a 'clean' or natural skincare routine, though it is thoroughly safety-tested.
Potential tightness on dry skin
In high concentrations, the film can feel slightly drying or tight, especially for those with very dry or compromised skin barriers.
Best for
- Anyone looking for long-wearing makeup or water-resistant sunscreen
- People with oily or combination skin who want a matte, stay-put finish
Use caution if
- Those who prefer 100% natural or plant-based ingredient lists
Usage tips
Safety summary
Extensively tested and considered safe for topical use at typical concentrations. Rare reports of mild irritation exist, but it is generally well-tolerated. Not a known allergen or sensitizer.
Research notes
Safety is supported by decades of use in cosmetics and by reviews from the Cosmetic Ingredient Review (CIR) panel, which found no significant toxicity or irritation concerns at intended use levels.
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 concentration restrictions.
- Common uses
- Sunscreens, Foundations, Mascaras, Hair styling products
- Environmental note
- As a synthetic polymer, it is not biodegradable. However, it is used in small amounts and is not known to bioaccumulate.
Good to know
- This polymer is often used in combination with other film-formers to fine-tune flexibility and water resistance.
- It is considered non-comedogenic and safe for most skin types, including acne-prone skin.
Common questions
What is Acrylates/Stearyl Methacrylate/VP Copolymer in beauty products?
This ingredient is a synthetic polymer that dries down to form a flexible, invisible film on your skin or hair. Think of it like a very thin, breathable plastic wrap that helps other ingredients stay put longer. It's commonly used in sunscreens to keep the SPF from washing off, in foundations to help them last all day, and in mascaras to prevent smudging. It also helps thicken a product's texture so it feels more luxurious.
What does Acrylates/Stearyl Methacrylate/VP Copolymer do in a beauty product?
When the product is applied and the water or solvent evaporates, the polymer chains link together to form a continuous, flexible film. This film physically locks in pigments, UV filters, and other active ingredients, improving water resistance, wear time, and texture. It also slightly thickens the formula, giving it a richer feel.
Is Acrylates/Stearyl Methacrylate/VP Copolymer safe for most people?
Extensively tested and considered safe for topical use at typical concentrations. Rare reports of mild irritation exist, but it is generally well-tolerated. Not a known allergen or sensitizer.
Who should be careful with Acrylates/Stearyl Methacrylate/VP Copolymer?
Those who prefer 100% natural or plant-based ingredient lists
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.