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Hydrogenated Polyisobutene

What Hydrogenated Polyisobutene is & what it does

A clear, non-greasy emollient that gives a cushiony glide and a water-resistant, long-wearing film. It helps sunscreens stay put and feel smooth.

What is Hydrogenated Polyisobutene and what does it do in sunscreen?

Hydrogenated Polyisobutene is a clear, synthetic emollient that gives a cushiony glide and a smooth skin-feel. It also forms a water-resistant, long-wearing film, which helps a sunscreen stay put and resist sweat and water. It is often used as a lightweight, stable replacement for mineral oil.

Is Hydrogenated Polyisobutene safe?

Yes. It is a widely used, well-tolerated emollient that sits on the surface of the skin rather than penetrating deeply. It is chemically stable and non-reactive, which is part of why formulators like it. It is not a known irritant or sensitizer for most people.

Does Hydrogenated Polyisobutene clog pores?

Generally no. It is considered low on the comedogenicity scale and is often chosen as a lighter, more refined alternative to mineral oil. Because it spreads as a thin film rather than a heavy grease, it is not a common pore-clogging culprit. As always, very acne-prone skin can react differently to any rich emollient.

Is Hydrogenated Polyisobutene the same as mineral oil?

No, but it plays a similar role. It is a synthetic emollient often used in place of mineral oil to give slip and a protective film, with a lighter, less greasy feel and more consistent purity. Both are non-reactive oils that condition the skin's surface.

Is Hydrogenated Polyisobutene natural or synthetic?

It is synthetic, made in a lab from polyisobutene that is then hydrogenated for stability. It does not occur in nature, but synthetic here means controlled and purified, not unsafe. The result is a clear, odorless emollient that performs predictably.

Sunscreens with Hydrogenated Polyisobutene

We rate 158 sunscreens that contain it, showing the top 10 by overall score:

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