What is Zinc Oxide?
Chemically, Zinc Oxide is a mineral-based ingredient. A mineral sunscreen and soothing agent rated 1/5, generally friendly to acne-prone skin.
Where Zinc Oxide shows up
Zinc Oxide is commonly formulated into sunscreens, mineral makeup, and masks. Separately from clogging, its irritancy is rated 0/5 — low, so it's unlikely to sting or sensitise on its own.
Is Zinc Oxide bad for acne-prone skin?
That low score makes Zinc Oxide a reasonable choice even for acne-prone skin. As always, individual reactions vary, but it is not a likely cause of clogged pores.