Ingredient review
PEG-3 Trimethylolpropane Triacrylate
INCI: PEG-3 Trimethylolpropane Triacrylate
A synthetic film-former that helps nail polish and mascara last longer, but may cause irritation for sensitive skin or eyes.
In plain English
This ingredient is a synthetic polymer that forms a thin, flexible film when it dries. In nail polish, it helps the color stick and resist chipping. In mascara, it helps the formula coat lashes evenly and stay put. Think of it like a clear, invisible glue that holds the product together on your nails or lashes.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Main practical flags: irritation is moderate; clogging risk is low.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- moderate
- Clogging risk
- low
Quick decision guide
Useful, but context matters
PEG-3 Trimethylolpropane Triacrylate can be useful, but watch for some irritation potential.
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 PEG-3 Trimethylolpropane Triacrylate.
- 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
moderateCan bother some users, especially with frequent use, damaged skin, or strong companion ingredients.
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
PEG-3 Trimethylolpropane Triacrylate is a synthetic acrylate polymer created by reacting trimethylolpropane with acrylic acid and ethylene oxide. It belongs to a family of ingredients called acrylates, which are widely used in cosmetics for their film-forming and binding properties.
How it works
When applied, the solvent in the product evaporates, leaving behind a thin, flexible film of this polymer. This film adheres to the surface (nail or lash), creating a durable, water-resistant layer that helps the color and other ingredients stay in place. It also helps the product spread evenly and smoothly.
Pros
Longer wear
Creates a durable film that helps nail polish resist chipping and mascara stay put for hours.
Smooth finish
Helps products spread evenly and dry to a glossy, even layer without streaks.
Cons and cautions
Irritation risk
Acrylates can cause skin or eye irritation, especially for those with sensitivities or allergies.
Environmental persistence
As a synthetic polymer, it does not readily break down in the environment, raising eco-concerns.
Best for
- People who want long-lasting nail polish that resists chipping
- Anyone looking for smudge-proof mascara or eyeliner
Use caution if
- Individuals with known acrylate allergies or sensitive skin around the eyes
Usage tips
Safety summary
Generally safe for most people when used in nail and eye-area cosmetics at typical levels. However, acrylates are known skin sensitizers, and individuals with allergies or very sensitive skin may experience irritation. Avoid contact with broken skin.
Research notes
Acrylates are well-studied as film-formers and binders. Safety assessments by the Cosmetic Ingredient Review (CIR) have found them safe for use in cosmetics at current concentrations, though they note a potential for skin sensitization in some individuals.
Common label clues
- Typical concentration
- Typically 1–10% in nail products; lower in eye-area cosmetics
- Regulatory status
- Approved for use in cosmetics in the US (FDA) and EU (CosIng) within typical concentrations. Not restricted but subject to general safety requirements.
- Common uses
- Nail polishes, Nail gels, Mascaras, Eyeliners
- Environmental note
- As a synthetic acrylate polymer, it is not biodegradable and may accumulate in waterways. Eco-conscious consumers may prefer nail polishes labeled '10-free' or 'water-based'.
Good to know
- This ingredient is often listed alongside other acrylates in nail products; check the full INCI for potential allergens.
- It is not used in leave-on facial skincare due to its film-forming nature and potential for irritation.
Common questions
What is PEG-3 Trimethylolpropane Triacrylate in beauty products?
This ingredient is a synthetic polymer that forms a thin, flexible film when it dries. In nail polish, it helps the color stick and resist chipping. In mascara, it helps the formula coat lashes evenly and stay put. Think of it like a clear, invisible glue that holds the product together on your nails or lashes.
What does PEG-3 Trimethylolpropane Triacrylate do in a beauty product?
When applied, the solvent in the product evaporates, leaving behind a thin, flexible film of this polymer. This film adheres to the surface (nail or lash), creating a durable, water-resistant layer that helps the color and other ingredients stay in place. It also helps the product spread evenly and smoothly.
Is PEG-3 Trimethylolpropane Triacrylate safe for most people?
Generally safe for most people when used in nail and eye-area cosmetics at typical levels. However, acrylates are known skin sensitizers, and individuals with allergies or very sensitive skin may experience irritation. Avoid contact with broken skin.
Who should be careful with PEG-3 Trimethylolpropane Triacrylate?
Individuals with known acrylate allergies or sensitive skin around the eyes
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.