What it is
Polyester-10 is a synthetic polyester resin used primarily as a film former and binder. It creates a flexible, cohesive film that holds pigments, glitter, and other particulates in place and gives a smooth, even deposit. In sunscreen mists and shimmer sprays it helps the formula adhere and distribute particles evenly across the skin.
Safety & warnings
Synthetic film-forming polyesters of this type are generally low-irritant and non-sensitizing in cosmetic use, as the polymer remains on the skin surface and is not appreciably absorbed.
Origin & sourcing
Synthetic, produced by condensation polymerization of polyol and polyacid (ester-forming) building blocks to yield a polyester resin.
Questions everyone asks
What is Polyester-10 used for?
It is a synthetic film former and binder that helps hold pigments and glitter in place and creates a smooth, even film, useful in sprays and shimmer sunscreens.
Does it provide sun protection?
No. It is a structural film former, not a UV filter.