What Is Peg-6 Trimethylolpropane Triacrylate?
PEG-6 Trimethylolpropane Triacrylate is a synthetic ingredient created by linking acrylic acid with a small polyethylene glycol chain and a trimethylolpropane core. The result is a triester molecule that combines the flexibility of polyethylene glycol with the quick-setting nature of acrylates. It was first explored in the late twentieth century when chemists searched for light yet strong film formers for paints and industrial coatings. Its clear finish and skin-friendly profile soon drew the attention of cosmetic formulators who needed thin flexible films in beauty products.
Manufacturing starts with trimethylolpropane, a sugar-derived alcohol, which is reacted with about six units of ethylene oxide to add the PEG segment. This intermediate then undergoes esterification with acrylic acid, yielding the final triacrylate ester. The process is tightly controlled to keep impurities low and ensure consistent performance in skincare and makeup.
Today you will most often find PEG-6 Trimethylolpropane Triacrylate in peel-off masks, long-wear foundations, waterproof mascaras, nail coatings, anti-aging serums and certain lightweight moisturizers where a breathable flexible film is needed to lock active ingredients in place.
Peg-6 Trimethylolpropane Triacrylate’s Cosmetic Benefits/Uses
This ingredient earns its spot in formulas because it delivers multiple technical benefits that improve both product experience and wear time.
- Binding: Acts as a molecular glue that helps pigments, powders and other ingredients stick together so the product applies evenly and stays put on the skin or lashes
- Film Forming: Creates a thin flexible layer on the surface of the skin or hair that locks in moisture, improves water resistance and adds a smooth polished finish without feeling heavy
Who Can Use Peg-6 Trimethylolpropane Triacrylate
This film former suits most skin types, including oily, combination and normal skin, because it dries to a very lightweight flexible layer that does not feel greasy. Dry skin can also tolerate it since the polymer helps trap moisture, though pairing it with a richer moisturizer is wise to avoid a tight feeling. Sensitive or compromised skin may need extra caution because the acrylate portion, while generally considered low risk, can occasionally trigger irritation in very reactive complexions.
The molecule is fully synthetic and made without animal derived raw materials, so it aligns with vegan and vegetarian preferences.
Current safety data show minimal absorption through intact skin, which suggests it is unlikely to pose a systemic risk for pregnant or breastfeeding women. That said this is not medical advice and anyone who is pregnant or nursing should discuss all skincare choices with a qualified healthcare professional.
PEG-6 Trimethylolpropane Triacrylate is not known to increase photosensitivity, so it will not make skin more prone to sunburn, though daily sunscreen remains essential for overall skin health.
The ingredient is compatible with most common actives such as niacinamide, peptides and hyaluronic acid, making it easy to slot into multi step routines without special timing or layering rules.
Potential Side Effects/Adverse Reactions
Responses to topical PEG-6 Trimethylolpropane Triacrylate vary from person to person. The following points list potential side effects that could occur, but they are uncommon when the ingredient is used correctly in a well formulated product.
- Mild skin irritation or stinging, especially on broken or freshly exfoliated skin
- Contact allergy presenting as redness itching or small bumps in individuals sensitive to acrylates
- Transient dryness or feeling of tightness if applied without a hydrating base underneath
- Eye irritation if the product accidentally gets into the eyes
- Rare clogging or breakouts in acne-prone skin when used in very high concentrations or layered with heavy occlusives
If any uncomfortable reaction develops stop use immediately and consult a healthcare professional for personalized guidance.
Comedogenic Rating
PEG-6 Trimethylolpropane Triacrylate scores a 1 out of 5 on the comedogenic scale. It is a large water-soluble polymer that stays mostly on the surface and washes off easily, so it rarely blocks pores. The rating is not a perfect 0 because very occlusive or poorly balanced formulas could trap sebum under the flexible film it forms.
With this low score it is generally fine for acne-prone or breakout-prone skin when used in lightweight products that are removed at the end of the day.
Keep in mind that the overall clogging risk depends on the full formula. If the polymer is combined with heavy oils or waxes the end product may feel more pore-sealing than the ingredient on its own.
Summary
PEG-6 Trimethylolpropane Triacrylate works as a binder and film former. Once applied it links together into a clear flexible mesh that keeps pigments in place, boosts wear time and seals in moisture without a greasy feel. The short PEG chain adds slip so the product glides on smoothly.
You will spot it in long wear makeup, peel off masks and waterproof mascara but it is less common than big name silicones so its use is still more niche than mainstream.
Safety studies show minimal skin absorption and a low irritation rate at normal cosmetic levels, making it safe for most users. Every skin is unique though, so patch testing a new product that contains this ingredient is always a wise step.