Polymethylsilsesquioxane
A spherical silicone powder. It gives mattity, soft focus and a velvety skin feel, visually filling texture and pores. Common in primers and foundations. Inert and does not dissolve on skin.
Supporting ingredient
It gives a product its texture, stability or shelf life. It has no claimed effect on the skin, so an efficacy tier does not apply. What is known about its safety is below
Tolerability and safety
- Irritation potential
- Low
- Allergen risk
- Low
- Pregnancy
- Safe
- Suitable for
- Normal, Dry, Combination, Oily, Sensitive
Frequently asked questions
Is Polymethylsilsesquioxane safe during pregnancy?
Polymethylsilsesquioxane is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
What skin types is Polymethylsilsesquioxane for?
Polymethylsilsesquioxane suits: normal, dry, combination, oily, sensitive.
What is Polymethylsilsesquioxane and what does it do in cosmetics?
A spherical silicone powder.
What's the INCI name for Polymethylsilsesquioxane?
The INCI name is Polymethylsilsesquioxane. It may also appear as: Silica Silylate.
See Polymethylsilsesquioxane in a product composition right on the store page
The Evigrade extension adds an evidence panel to iHerb, Sephora, Druni and 12 more stores. This ingredient and every other one in the product show evidence-tier, allergen risk and pregnancy/lactation flags at a glance.
Similar role in the formula
Other functional ingredients
Polypropylsilsesquioxane, Polyquaternium-10, Polyquaternium-11, Polyquaternium-37, Sorbitan Sesquioleate, C12-13 Pareth-9, Disodium Lauryl Sulfosuccinate, Myristic Acid
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