What it is
Polyvinyl acetate is a rubbery polymer made by polymerizing vinyl acetate monomer. In cosmetics it dries to a continuous, flexible film that improves the wear and uniformity of a layer left on the skin, helping pigments and other actives stay in place and set down evenly. In sunscreens it is valued for promoting an even, non-tacky finish.
Safety & warnings
Polyvinyl acetate is a high-molecular-weight polymer that is not absorbed into skin and is regarded as well tolerated in cosmetic use. It is not a known sensitizer or fragrance allergen at typical use levels.
Origin & sourcing
Synthetic polymer produced by polymerization of vinyl acetate monomer.
Questions everyone asks
What role does polyvinyl acetate play in a sunscreen?
It is a film former that helps the product dry to an even, flexible layer and keep pigments and other ingredients in place.
Is polyvinyl acetate safe on skin?
As a large polymer it stays on the surface and is generally considered well tolerated in leave-on cosmetics.