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Methoxy Peg/Ppg-25/4 Dimethicone

What Methoxy Peg/Ppg-25/4 Dimethicone is & what it does

Methoxy PEG/PPG-25/4 Dimethicone is a silicone-based surfactant and emulsifier built on a dimethicone backbone with attached polyethylene and polypropylene glycol groups. In sunscreen and skincare formulas it helps stabilize emulsions, especially water-in-silicone systems, and improves spreadability. Its silicone structure also contributes a smooth, silky skin feel.

Is Methoxy Peg/Ppg-25/4 Dimethicone safe?

Methoxy PEG/PPG-25/4 Dimethicone is a silicone-based emulsifier used in cosmetics and is generally considered safe and well tolerated. Its job is to stabilize emulsions and improve feel. A patch test is reasonable if your skin is reactive, and a professional can advise on specific concerns.

What does Methoxy Peg/Ppg-25/4 Dimethicone do in skincare?

It is a silicone-based surfactant and emulsifier that helps stabilize emulsions, especially water-in-silicone systems common in sunscreens. It also improves spreadability and contributes a smooth, silky skin feel. It is a texture and stability ingredient rather than an active.

Is Methoxy Peg/Ppg-25/4 Dimethicone natural or synthetic?

It is a synthetic ingredient built on a dimethicone (silicone) backbone with attached polyethylene and polypropylene glycol groups. It is not plant- or mineral-derived. It is manufactured for use as a cosmetic emulsifier.

Sunscreens with Methoxy Peg/Ppg-25/4 Dimethicone

We rate 11 sunscreens that contain it, showing the top 10 by overall score:

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