Hydrogenated Polyisobutene
INCI · Hydrogenated Polyisobutene
Overview
A synthetic hydrocarbon liquid often used where mineral oil once was. It sits on the surface, slows water loss and gives a cushioned, glossy slip, and it does not oxidise or go rancid the way many plant oils eventually do.
Who it's for
Lip products, balms and rich creams; also cleansing formulas, where its ability to dissolve makeup is the point.
Cautions
It is inert and stays on the surface rather than feeding skin, so it supports the barrier rather than repairing it. Whether an occlusive layer suits you is a texture and skin-type question — very rich formulas can feel heavy on skin that is oily rather than dry.
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What does Hydrogenated Polyisobutene do in skincare?
A synthetic hydrocarbon liquid often used where mineral oil once was. It sits on the surface, slows water loss and gives a cushioned, glossy slip, and it does not oxidise or go rancid the way many plant oils eventually do.
Is Hydrogenated Polyisobutene considered safe for skin?
It is inert and stays on the surface rather than feeding skin, so it supports the barrier rather than repairing it. Whether an occlusive layer suits you is a texture and skin-type question — very rich formulas can feel heavy on skin that is oily rather than dry.