Ingredient review
Acrylates/TDI/Trimethylolpropane Copolymer
INCI: ACRYLATES/TDI/TRIMETHYLOLPROPANE COPOLYMER
A synthetic polymer that helps products stay put and resist water, but offers no skincare benefit.
In plain English
This ingredient is a plastic-like film former. When applied to skin, it dries down to create a flexible, invisible layer that helps makeup or sunscreen stay in place longer and resist sweat or water. It doesn't moisturize or treat skin—it's purely a performance enhancer for texture and wear.
Quick decision guide
Useful, but context matters
Acrylates/TDI/Trimethylolpropane 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/TDI/Trimethylolpropane 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, toluene diisocyanate (TDI), and trimethylolpropane. It is engineered to form a flexible film on the skin.
How it works
After the product is applied, the solvent (usually water or alcohol) evaporates, leaving behind a thin, flexible polymer film. This film physically locks pigments and active ingredients in place, improving water resistance and preventing smudging or transfer.
Pros
Boosts wear time
Creates a flexible film that helps makeup and sunscreen resist sweat, water, and rubbing, so you don't have to reapply as often.
Improves texture
Helps formulas spread smoothly and evenly, reducing the need for talc or other powders that can look cakey.
Cons and cautions
No skin benefit
This ingredient is purely a performance additive—it doesn't hydrate, soothe, or protect skin in any way.
Potential tightness
In high concentrations, the film can feel stiff or uncomfortable, especially on dry or sensitive skin.
Best for
- Anyone wanting long-lasting, water-resistant makeup or sunscreen
- People with oily skin who need products that stay put
Use caution if
- Those who prefer minimal, natural ingredient lists and avoid synthetic polymers
Usage tips
Safety summary
Acrylates/TDI/Trimethylolpropane Copolymer is considered safe for cosmetic use at typical concentrations. It has low irritation and comedogenic potential. However, it offers no skincare benefit and may feel uncomfortable on very dry skin. The raw material TDI is hazardous, but it is fully consumed during polymerization and not present in the final ingredient.
Research notes
Safety assessments by the Cosmetic Ingredient Review (CIR) panel have concluded that acrylates copolymers are safe in cosmetics when formulated properly. There is limited independent research on this specific copolymer, but its class is well-studied and widely used.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the US (FDA), EU, and other major markets. The final polymer is considered safe at typical use levels.
- Common uses
- Sunscreens, Waterproof makeup, Long-wear foundations, Eyeliners
- Environmental note
- As a synthetic polymer, it is not biodegradable and may contribute to microplastic concerns if washed into waterways. Some regions are reviewing polymer use in rinse-off products.
Good to know
- TDI is a raw material used in the synthesis, but it is fully reacted and not present in the final ingredient in its free form.
- This polymer is often used alongside silicones to create a smooth, breathable feel.
Common questions
What is Acrylates/TDI/Trimethylolpropane Copolymer in beauty products?
This ingredient is a plastic-like film former. When applied to skin, it dries down to create a flexible, invisible layer that helps makeup or sunscreen stay in place longer and resist sweat or water. It doesn't moisturize or treat skin—it's purely a performance enhancer for texture and wear.
What does Acrylates/TDI/Trimethylolpropane Copolymer do in a beauty product?
After the product is applied, the solvent (usually water or alcohol) evaporates, leaving behind a thin, flexible polymer film. This film physically locks pigments and active ingredients in place, improving water resistance and preventing smudging or transfer.
Is Acrylates/TDI/Trimethylolpropane Copolymer safe for most people?
Acrylates/TDI/Trimethylolpropane Copolymer is considered safe for cosmetic use at typical concentrations. It has low irritation and comedogenic potential. However, it offers no skincare benefit and may feel uncomfortable on very dry skin. The raw material TDI is hazardous, but it is fully consumed during polymerization and not present in the final ingredient.
Who should be careful with Acrylates/TDI/Trimethylolpropane Copolymer?
Those who prefer minimal, natural ingredient lists and avoid synthetic polymers
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.