A viscous synthetic emollient. It gives a rich film and shine, common in balms and glossy textures. Inert, not absorbed by skin.
Topical application
BLimited evidence. One RCT or several controlled studies with limitations.
A functional film-forming emollient. Safe; oily skin watches the heavy film.
Polybutene (INCI: Polybutene) is a viscous synthetic emollient, a liquid polymer made from isobutylene. In a formula it gives a dense film and clear shine, which is why it shows up in lip balms, glosses and glossy-finish textures. On skin it stays on the surface and does not absorb. On efficacy it is a functional component, not a treatment active. It neither hydrates nor repairs: its job is to give the texture body, cling and that wet-look gloss. It does that sensory job well, with no claims beyond it. Topically its systemic absorption is negligible, so it can be used during pregnancy and breastfeeding with no known restriction. Tolerance is high: low irritation potential and low allergy risk, suitable for sensitive skin too. Comedogenicity is low (1), but as a tacky occlusive layer, very oily or acne-prone skin may find it a little heavy in closed areas.
Irritation potential
LowAllergen risk
LowPregnancy
SafeSuitable for
The Evigrade extension adds an evidence panel to iHerb, Sephora, Druni and 12 more stores. This ingredient and every other one in the product show evidence-tier, allergen risk and pregnancy/lactation flags at a glance.
Polybutene is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
Polybutene suits: normal, dry, combination, oily, sensitive.
A viscous synthetic emollient.
On the Fulton scale 1/5 – very low comedogenicity. For acne-prone skin, a rating of 3 or higher suggests choosing an alternative.
The INCI name is Polybutene. It may also appear as: Полибутен.
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