Ingredient review
Dimethylacrylamide/Laureth Methacrylate Copolymer
INCI: DIMETHYLACRYLAMIDE/LAURYL METHACRYLATE COPOLYMER
A synthetic film-former that helps products stay put and resist water, but offers no active skincare benefit.
In plain English
This is a man-made polymer that dries down to form a thin, flexible film on your skin or hair. Think of it like an invisible, breathable plastic wrap that helps makeup last longer, sunscreen stay effective in water, or hair hold its style. It doesn't treat or change your skin—it just sits on top and helps other ingredients stay in place.
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
Dimethylacrylamide/Laureth 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 Dimethylacrylamide/Laureth 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 dimethylacrylamide and lauryl methacrylate monomers, designed to form a continuous film when applied to skin or hair.
How it works
When the water or solvent in a product evaporates, the copolymer molecules link together into a thin, flexible film. This film physically locks in pigments, UV filters, or styling agents, and resists being washed away by water or sweat.
Pros
Boosts water resistance
Helps sunscreen and makeup stay effective even when you sweat or swim, so you don't have to reapply as often.
Extends wear time
Creates a flexible barrier that keeps foundation, eyeliner, or mascara from smudging or fading throughout the day.
Cons and cautions
No active benefit
This ingredient only forms a film—it doesn't hydrate, soothe, or treat skin, so it's purely a functional additive.
Can be hard to remove
The water-resistant film may require an oil-based cleanser or double cleansing to fully wash off, which can be inconvenient.
Best for
- Anyone wanting long-lasting, water-resistant makeup or sunscreen
- People with oily skin who prefer a matte, stay-put finish
Use caution if
- Those who prefer minimal, breathable routines and dislike layered films on skin
Usage tips
Safety summary
Considered safe at typical cosmetic concentrations. Low irritation and comedogenic potential. No known significant health risks, though it offers no skincare benefit.
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 are publicly available.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the US, EU, and other major markets. No specific restrictions at typical use levels.
- Common uses
- Sunscreens, Waterproof makeup, Long-wear foundations, Hair styling products
- Environmental note
- As a synthetic polymer, it is not biodegradable and may accumulate in the environment. Some regions are beginning to restrict certain film-forming polymers in rinse-off products.
Good to know
- This polymer is often listed near the end of ingredient lists because it's used at low concentrations.
- It is not absorbed into skin—it stays on the surface, making it safe for most people.
Common questions
What is Dimethylacrylamide/Laureth Methacrylate Copolymer in beauty products?
This is a man-made polymer that dries down to form a thin, flexible film on your skin or hair. Think of it like an invisible, breathable plastic wrap that helps makeup last longer, sunscreen stay effective in water, or hair hold its style. It doesn't treat or change your skin—it just sits on top and helps other ingredients stay in place.
What does Dimethylacrylamide/Laureth Methacrylate Copolymer do in a beauty product?
When the water or solvent in a product evaporates, the copolymer molecules link together into a thin, flexible film. This film physically locks in pigments, UV filters, or styling agents, and resists being washed away by water or sweat.
Is Dimethylacrylamide/Laureth Methacrylate Copolymer safe for most people?
Considered safe at typical cosmetic concentrations. Low irritation and comedogenic potential. No known significant health risks, though it offers no skincare benefit.
Who should be careful with Dimethylacrylamide/Laureth Methacrylate Copolymer?
Those who prefer minimal, breathable routines and dislike layered films on skin
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.