Dimethicone

Also known as: Polydimethylsiloxane, PDMS, Silicone

Generally SafesiliconeEWG: 1-3

A skin-conditioning silicone that creates a smooth, protective film and fills in fine lines.

How it works

Dimethicone is a linear silicone polymer that forms a breathable, water-repellent film on skin. It reduces transepidermal water loss, creates a smooth slip on skin, and temporarily fills in fine lines and pores for an optical smoothing effect. High molecular weight dimethicones stay on the surface; lower molecular weight forms can penetrate slightly.

Best for

Dry skinPrimer makeupScar treatmentBarrier protection

Avoid if

Silicone-sensitive skin (rare)

Commonly found in

PrimersFoundationsMoisturizersHair serumsScar treatments

✅ Pairs well with

Glycerin Ceramide NP Niacinamide

Safety & restrictions

No known significant safety concerns for topical use. Environmental persistence concern — silicones are slow to biodegrade. Some silicone compounds (cyclic silicones D4, D5) are restricted in EU wash-off products.

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For informational purposes only. Not medical advice. Consult a dermatologist for personalised guidance.