Ingredient review
Ethylene/Calcium Acrylate Copolymer
INCI: ETHYLENE/CALCIUM ACRYLATE COPOLYMER
A synthetic polymer that helps products stay put and resist water, but offers no active skincare benefit.
In plain English
This is a man-made plastic-like ingredient that forms a thin, flexible film on your skin or hair. It's often used in sunscreens and long-wear makeup to help the product stay in place and resist water and sweat. Think of it like an invisible, breathable raincoat for your skin.
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
Ethylene/Calcium Acrylate 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 Ethylene/Calcium Acrylate 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 ethylene and calcium acrylate, designed to create a flexible, water-resistant film when applied to the skin or hair.
How it works
When the product dries, the copolymer molecules link together to form a continuous, flexible film. This film physically blocks water from penetrating the product layer, improving water resistance and helping active ingredients (like sunscreen filters) stay on the skin longer.
Pros
Boosts water resistance
Helps sunscreens and makeup stay effective longer during swimming, sweating, or humid conditions.
Lightweight feel
Unlike older film-formers, this copolymer creates a flexible film that doesn't feel heavy or stiff on the skin.
Cons and cautions
No active benefit
It's purely a functional ingredient—it doesn't hydrate, soothe, or treat skin concerns.
May require double cleansing
Because it forms a water-resistant film, it can be stubborn to remove with a gentle cleanser alone, potentially leading to buildup.
Best for
- People who need water-resistant sunscreen or long-wear makeup
- Those with normal to oily skin who want products that stay put
Use caution if
- Individuals with very dry or dehydrated skin who prefer lightweight, non-film-forming products
- Anyone who finds film-forming ingredients uncomfortable or difficult to remove
Usage tips
Safety summary
Ethylene/Calcium Acrylate Copolymer is considered safe for use in cosmetics at typical concentrations. It has a low irritation and comedogenic risk, making it suitable for most skin types. However, it is a purely functional ingredient with no active skincare benefits.
Research notes
Safety assessments by the Cosmetic Ingredient Review (CIR) panel and other bodies have concluded that acrylate copolymers are safe in cosmetic formulations. Most evidence comes from industry safety data rather than independent clinical studies.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the EU, USA, and many other regions. No concentration restrictions are typically imposed.
- Common uses
- Sunscreens, Water-resistant lotions, Makeup primers, Hair styling products
- Environmental note
- As a synthetic polymer, it is not readily biodegradable. Some jurisdictions are reviewing the environmental impact of such ingredients, but it is not currently restricted.
Good to know
- This ingredient is considered safe by major regulatory bodies when used as directed in cosmetics.
- It is not biodegradable, so it may persist in the environment after washing off.
Common questions
What is Ethylene/Calcium Acrylate Copolymer in beauty products?
This is a man-made plastic-like ingredient that forms a thin, flexible film on your skin or hair. It's often used in sunscreens and long-wear makeup to help the product stay in place and resist water and sweat. Think of it like an invisible, breathable raincoat for your skin.
What does Ethylene/Calcium Acrylate Copolymer do in a beauty product?
When the product dries, the copolymer molecules link together to form a continuous, flexible film. This film physically blocks water from penetrating the product layer, improving water resistance and helping active ingredients (like sunscreen filters) stay on the skin longer.
Is Ethylene/Calcium Acrylate Copolymer safe for most people?
Ethylene/Calcium Acrylate Copolymer is considered safe for use in cosmetics at typical concentrations. It has a low irritation and comedogenic risk, making it suitable for most skin types. However, it is a purely functional ingredient with no active skincare benefits.
Who should be careful with Ethylene/Calcium Acrylate Copolymer?
Individuals with very dry or dehydrated skin who prefer lightweight, non-film-forming products Anyone who finds film-forming ingredients uncomfortable or difficult 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.