Ingredient review
Acrylates/Steareth-30 Methacrylate Copolymer
INCI: ACRYLATES/STEARETH-30 METHACRYLATE COPOLYMER
A safe, synthetic film-former that helps products stay put and resist water without feeling heavy.
In plain English
This ingredient is a synthetic polymer that forms a thin, flexible film on your skin. It's often used in sunscreens and makeup to help the product spread evenly, stay in place longer, and resist water or sweat. Think of it like a gentle, invisible shield that helps your skincare or makeup last without clogging pores or feeling sticky.
Quick decision guide
Useful, but context matters
Acrylates/Steareth-30 Methacrylate 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/Steareth-30 Methacrylate 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 and steareth-30 methacrylate, designed to create a flexible, water-resistant film on the skin.
How it works
When applied, the polymer molecules link together to form a continuous, breathable film. This film helps other ingredients (like UV filters or pigments) stay evenly distributed and adhere to the skin, improving wear time and water resistance without a heavy or greasy feel.
Pros
Lightweight water resistance
Provides effective water and sweat resistance without the heavy, sticky feel of older film-formers, making it ideal for daily wear and active lifestyles.
Improves product elegance
Helps sunscreens and foundations spread smoothly and evenly, reducing patchiness and improving the overall sensory experience.
Cons and cautions
Requires double cleansing
Because it forms a durable film, it may not rinse off with water alone. You'll likely need an oil-based cleanser or micellar water to remove it completely.
Synthetic origin
As a synthetic polymer, it doesn't fit into natural or 'clean beauty' routines. Some consumers prefer to avoid synthetic ingredients on principle.
Best for
- Anyone looking for long-wearing, water-resistant sunscreens or makeup
- People with oily or combination skin who prefer lightweight, non-greasy textures
Use caution if
- Those who prefer exclusively natural or plant-based ingredients
Usage tips
Safety summary
Acrylates/Steareth-30 Methacrylate Copolymer is considered safe for use in cosmetics. It has low irritation and comedogenic potential, and no significant safety concerns have been raised by regulatory bodies.
Research notes
Safety assessments by the Cosmetic Ingredient Review (CIR) panel have concluded that acrylates copolymers are safe when formulated to be non-irritating. Specific studies on this variant are limited, but its chemical class is well-established as safe.
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 at typical use levels.
- Common uses
- Sunscreens, Foundations, Tinted moisturizers, Water-resistant creams
- Environmental note
- As a synthetic polymer, its biodegradability is limited. However, it is not classified as a microplastic under current definitions and is used in low concentrations.
Good to know
- This ingredient is often listed near the end of an INCI because it's used at low concentrations, but its effect on texture and wear is significant.
- It is considered safe and non-irritating by major cosmetic safety panels.
Common questions
What is Acrylates/Steareth-30 Methacrylate Copolymer in beauty products?
This ingredient is a synthetic polymer that forms a thin, flexible film on your skin. It's often used in sunscreens and makeup to help the product spread evenly, stay in place longer, and resist water or sweat. Think of it like a gentle, invisible shield that helps your skincare or makeup last without clogging pores or feeling sticky.
What does Acrylates/Steareth-30 Methacrylate Copolymer do in a beauty product?
When applied, the polymer molecules link together to form a continuous, breathable film. This film helps other ingredients (like UV filters or pigments) stay evenly distributed and adhere to the skin, improving wear time and water resistance without a heavy or greasy feel.
Is Acrylates/Steareth-30 Methacrylate Copolymer safe for most people?
Acrylates/Steareth-30 Methacrylate Copolymer is considered safe for use in cosmetics. It has low irritation and comedogenic potential, and no significant safety concerns have been raised by regulatory bodies.
Who should be careful with Acrylates/Steareth-30 Methacrylate Copolymer?
Those who prefer exclusively natural or plant-based ingredients
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.