Po
Polyisobutene
PolyisobuteneBarrier
A synthetic emollient and film-former that adds gloss and a flexible, water-resistant feel, often in lip products and long-wear formulas.
What it does
Polyisobutene is a synthetic polymer used as an emollient and film-former. It gives shine, a cushiony feel, and a flexible water-resistant film, which is why it shows up in glosses, long-wear textures, and some sunscreens. It works on feel and wear rather than acting on the skin.
This page is public and indexed on purpose (unlike profiles and drops, which are unlisted) — it’s the citation behind shared ingredient cards, and it should be findable.
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