Ingredient review
Acrylate Film-Forming Polymer
INCI: Octylacrylamide/Acrylates/Butylaminoethyl Methacrylate Copolymer
A synthetic polymer that helps makeup and hair products stay put, but may feel stiff or heavy on some.
In plain English
This ingredient is a plastic-like film former. When applied, it dries down into a thin, flexible layer that helps other ingredients stick to your skin or hair and resist water, sweat, or rubbing. You'll find it in long-wear foundations, waterproof mascaras, and hair sprays. It's generally safe but can feel a bit stiff or tacky if overused.
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
Acrylate Film-Forming Polymer 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 Acrylate Film-Forming Polymer.
- 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 three monomers: octylacrylamide, acrylates, and butylaminoethyl methacrylate. It is designed to form a durable, water-resistant film on surfaces.
How it works
After the product is applied and the solvent (usually water or alcohol) evaporates, the polymer molecules link together into a continuous film. This film physically locks pigments, sunscreen actives, or hair strands in place, improving wear time and water resistance.
Pros
Excellent wear time
Creates a durable film that helps makeup and sunscreen last through sweat, humidity, and water exposure.
Flexible film
Unlike some older polymers, this one dries to a flexible layer that moves with your skin or hair, reducing cracking or flaking.
Cons and cautions
Can feel stiff or heavy
On some skin types or in high concentrations, the film may feel tight, sticky, or like a mask.
Requires thorough removal
The water-resistant film can trap dirt and oil, so you may need an oil-based cleanser or double cleansing to fully remove it.
Best for
- People who want long-wearing makeup or waterproof sunscreen
- Those with oily skin who need products that resist sweat and sebum
Use caution if
- Anyone with very dry or sensitive skin who finds film-formers uncomfortable
Usage tips
Safety summary
Considered safe for topical use in cosmetics at typical concentrations. Rare reports of mild irritation or allergic contact dermatitis. Not a known endocrine disruptor or carcinogen.
Research notes
Safety data is based on analog studies of similar acrylate copolymers. The Cosmetic Ingredient Review (CIR) panel has reviewed related polymers and found them safe as used. No specific human studies on this exact copolymer were identified.
Common label clues
- Typical concentration
- 0.5–5% in leave-on products; up to 10% in hair sprays
- Regulatory status
- Approved for use in cosmetics in the US, EU, and many other regions. No specific concentration limits, but formulators typically keep it under 10%.
- Common uses
- Hair styling products, Waterproof mascara, Sunscreens, Long-wear makeup
- Environmental note
- As a synthetic polymer, it is not biodegradable and may contribute to microplastic pollution. Some brands are moving toward biodegradable alternatives.
Good to know
- This polymer is often used in combination with other film-formers to fine-tune flexibility and hold.
- It is not water-soluble, so it resists sweat and rain but also means it won't wash off with plain water.
Common questions
What is Acrylate Film-Forming Polymer in beauty products?
This ingredient is a plastic-like film former. When applied, it dries down into a thin, flexible layer that helps other ingredients stick to your skin or hair and resist water, sweat, or rubbing. You'll find it in long-wear foundations, waterproof mascaras, and hair sprays. It's generally safe but can feel a bit stiff or tacky if overused.
What does Acrylate Film-Forming Polymer do in a beauty product?
After the product is applied and the solvent (usually water or alcohol) evaporates, the polymer molecules link together into a continuous film. This film physically locks pigments, sunscreen actives, or hair strands in place, improving wear time and water resistance.
Is Acrylate Film-Forming Polymer safe for most people?
Considered safe for topical use in cosmetics at typical concentrations. Rare reports of mild irritation or allergic contact dermatitis. Not a known endocrine disruptor or carcinogen.
Who should be careful with Acrylate Film-Forming Polymer?
Anyone with very dry or sensitive skin who finds film-formers uncomfortable
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.