Ingredient review
Acrylates/Diacetoneacrylamide Copolymer
INCI: ACRYLATES/DIACETONEACRYLAMIDE COPOLYMER
A reliable film-former that helps products stay put and resist water, but it's purely synthetic and may feel tight on some skin types.
In plain English
This is a synthetic plastic-like ingredient that dries down to form a thin, flexible film on your skin or hair. Think of it like a clear, invisible shield that helps other ingredients stay in place and resist water, sweat, or rubbing off. It's commonly used in sunscreens to keep the SPF even and in long-wear makeup to prevent smudging.
Quick decision guide
Useful, but context matters
Acrylates/Diacetoneacrylamide 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/Diacetoneacrylamide 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 derivatives and diacetoneacrylamide monomers, engineered to create a flexible, water-resistant film when applied to the skin or hair.
How it works
When the water or solvent in a product evaporates, the copolymer molecules link together into a continuous, invisible film. This film physically blocks water from penetrating (improving water resistance) and helps hold other ingredients like pigments or UV filters in place. It also thickens the product's texture slightly.
Pros
Boosts water resistance
Helps sunscreens and makeup stay effective even when you sweat or get wet, so you don't have to reapply as often.
Enhances wear time
Creates a flexible film that keeps foundation, eyeliner, or mascara from smudging or fading throughout the day.
Cons and cautions
Can feel tight on dry skin
The film-forming nature may leave very dry or dehydrated skin feeling stiff or uncomfortable, especially if layered heavily.
Requires thorough removal
Because it forms a water-resistant barrier, it may not wash off with gentle cleansers alone; an oil-based or double-cleansing step is often needed.
Best for
- People who want long-wearing, water-resistant makeup or sunscreen
- Those with oily or combination skin who prefer a matte finish
Use caution if
- People with very dry or dehydrated skin who dislike a tight feeling after product application
Usage tips
Safety summary
Considered safe for topical use at typical concentrations. It is not absorbed into the skin and has a very low irritation and allergy potential. The main downside is cosmetic (tightness) rather than safety-related.
Research notes
Safety assessments by cosmetic ingredient review panels have found acrylates copolymers to be safe when used as intended. There is limited independent research on this specific copolymer, but it is structurally similar to other well-studied film-formers.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the US, EU, and most major markets. No specific concentration limits are set, but typical use levels are low.
- Common uses
- Sunscreens, Long-wear makeup, Hair styling products, Water-resistant lotions
- Environmental note
- As a synthetic polymer, it is not biodegradable and may contribute to microplastic concerns if washed into waterways. Some brands are moving toward biodegradable alternatives.
Good to know
- This ingredient is not absorbed into the skin; it sits on the surface as a film.
- It is often combined with other film-formers for extra durability in waterproof formulas.
- The 'diacetoneacrylamide' part contributes flexibility, so the film doesn't crack or flake.
Common questions
What is Acrylates/Diacetoneacrylamide Copolymer in beauty products?
This is a synthetic plastic-like ingredient that dries down to form a thin, flexible film on your skin or hair. Think of it like a clear, invisible shield that helps other ingredients stay in place and resist water, sweat, or rubbing off. It's commonly used in sunscreens to keep the SPF even and in long-wear makeup to prevent smudging.
What does Acrylates/Diacetoneacrylamide Copolymer do in a beauty product?
When the water or solvent in a product evaporates, the copolymer molecules link together into a continuous, invisible film. This film physically blocks water from penetrating (improving water resistance) and helps hold other ingredients like pigments or UV filters in place. It also thickens the product's texture slightly.
Is Acrylates/Diacetoneacrylamide Copolymer safe for most people?
Considered safe for topical use at typical concentrations. It is not absorbed into the skin and has a very low irritation and allergy potential. The main downside is cosmetic (tightness) rather than safety-related.
Who should be careful with Acrylates/Diacetoneacrylamide Copolymer?
People with very dry or dehydrated skin who dislike a tight feeling after product application
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.