Polyisobutene

Polyisobutene is a synthetic hydrocarbon polymer available in varying molecular weights. In skincare and makeup it forms a flexible, glossy film that adds slip, cushion, and an occlusive feel, leaving texture smoother and the finish more conditioned.
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Ingredient Snapshot

Overview
A glossy, cushiony ingredient that seals in moisture and shine.
Category
Hydration, Barrier Support, Skin Conditioning, Tone/Texture
Type
Film Former

Ingredient Ratings

Overall Rating

Good

Comedogenic Risk

None

Skin Benefits

Seals in moisture to minimize water loss, leaving skin and lips feeling plush with a soft shine.

Uses In Skincare & Cosmetics

Used in lip glosses, balms, and makeup primers, as well as rich creams, to boost slip and payoff.

Comedogenic Rating

This ingredient is not typically evaluated for comedogenicity, and no standardized rating is available.

Safety

Generally viewed as non-irritating and non-sensitizing. Its occlusive nature may feel heavy for some or be less suitable for those who prefer very breathable textures. No common regulatory restrictions noted.

Is Polyisobutene a Good Ingredient?

Rated Good because it is a stable, inert film former/emollient that boosts slip and occlusion for smoother texture and conditioning feel. Benefits are mainly sensorial and barrier-feel rather than active treatment effects.

Products with Polyisobutene

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