What is polymethylsilsesquioxane?

It's a silicone-based powder that smooths skin texture and helps formulas spread evenly. It's commonly used in primers, foundations, and skincare products.

Is silicone in skincare bad?

Regulatory reviews have not identified safety concerns with this silicone ingredient in cosmetics. Claims that all silicones clog pores are not supported by published evidence, though individual skin types may react differently.

emollient

Polymethylsilsesquioxane

Generally safe·Moderate evidence

A silicone-based powder used to improve texture and slip in formulas. It is lightweight, absorbs excess moisture, and provides smooth application. Well studied in cosmetics with no skin safety concerns.

Questions

What is polymethylsilsesquioxane?: It's a silicone-based powder that smooths skin texture and helps formulas spread evenly. It's commonly used in primers, foundations, and skincare products.
Is silicone in skincare bad?: Regulatory reviews have not identified safety concerns with this silicone ingredient in cosmetics. Claims that all silicones clog pores are not supported by published evidence, though individual skin types may react differently.

Products with Polymethylsilsesquioxane

References

Cosmetic information for general education, not medical advice. A verdict is a reading of the published evidence, never a guarantee for your skin: any ingredient can irritate someone, so patch test new products and see a professional if you react. Concern is graded on cited evidence, never on hazard-score lists. See how we score.