Ingredient dictionary

PVM/MA Copolymer

A synthetic film-forming polymer made from two building blocks, used to leave a thin, flexible film on skin or hair that helps products stay put. It is on the label of 6 products in our library. Checked against our library November 6, 2026.

What PVM/MA Copolymer does

Forms a flexible, thin film on skin
Helps UV filters stay in place
Adds some water resistance to formulas

PVM/MA Copolymer is made by linking two simple building blocks, methyl vinyl ether and maleic anhydride, into long chains. Chemists often adjust the finished polymer so it blends easily into the rest of the formula. It is a supporting ingredient rather than an active one, so it is there mainly for how the product behaves.

Formulators reach for it because film formers lay down a thin, flexible layer on the skin. In sunscreens, that layer helps hold UV filters in place and adds some water resistance. The finish is usually light, though some people notice a slightly dry or filmy feel.

Good for

People looking for sunscreens and after-sun products that stay put through a day outdoors.

Frequently asked questions

Is PVM/MA Copolymer safe for sensitive skin?

It is a widely used film former and is generally well tolerated. Any formula can still bother sensitive skin, so testing a new product on a small area first is sensible. If redness or stinging appears, stop using it and ask a dermatologist.

Does PVM/MA Copolymer help sunscreen stay on in water?

It can add some water resistance, because film formers help keep UV filters from washing off as quickly. No sunscreen stays fully on through sweat or swimming, though. Look for the water-resistance wording on the label and reapply as directed.