What it is
Ethylene/Acrylic Acid Copolymer is a synthetic polymer made from ethylene and acrylic acid monomers. In cosmetic and sunscreen formulas it is used to form a thin film on the skin, to help bind and structure the product, and to adjust its thickness and stability. It contributes to product feel and wear rather than to UV protection.
Safety & warnings
As a large, essentially inert polymer it has low skin penetration and is generally well tolerated in topical products. It is not a recognized fragrance allergen and is not considered a comedogenic oil.
Origin & sourcing
A fully synthetic polymer produced by polymerizing petrochemically derived ethylene and acrylic acid monomers.
Questions everyone asks
What role does this copolymer play?
It forms a film and helps structure and stabilize the product, improving texture and wear.
Does it absorb UV light?
No. It is a structural and film-forming polymer, not a UV filter.