What are the benefits of Polymethylsilsesquioxane for skin?

texture enhancement, soft-focus blurring effect, sebum absorption, fine line minimisation, smooth skin feel, water repellency, spreadability improvement, shine control

What concentration of Polymethylsilsesquioxane is effective?

Typical effective concentrations of Polymethylsilsesquioxane are Typically 1–20% in finished formulations, added to the oil phase. Most prevalent in foundations, concealers, primers, pressed powders, and sun care products..

What skin types is Polymethylsilsesquioxane suitable for?

Polymethylsilsesquioxane is suitable for all skin types, oily, combination, sensitive, dry, acne-prone, mature skin.

Polymethylsilsesquioxane — Skincare Ingredient Guide

Q: Can Polymethylsilsesquioxane cause skin irritation?

Polymethylsilsesquioxane has a low irritation risk. The Cosmetic Ingredient Review (CIR) Expert Panel concluded that polysilsesquioxanes are safe in cosmetics at present practices of use and concentration. The ingredient is non-toxic and non-irritating to skin and mucous membranes; rare eye irritation has been noted if powder contacts the eye directly. Well tolerated by most skin types including sensitive skin. No EU CosIng Annex II or III restrictions apply.

Q: Is Polymethylsilsesquioxane safe to use during pregnancy?

Polymethylsilsesquioxane is rated "caution" for pregnancy use. The CIR Expert Panel found no published developmental and reproductive toxicity (DART) data for polysilsesquioxane ingredients. The ingredient is not absorbed transdermally due to its large particle size, which limits systemic exposure. It is generally considered low risk, but consult a healthcare provider if concerned, as specific pregnancy safety data is absent from the published literature.

Q: Does Polymethylsilsesquioxane increase sun sensitivity?

Polymethylsilsesquioxane has a no sun sensitivity risk. Polymethylsilsesquioxane does not contain photosensitising compounds and does not increase UV sensitivity. No additional sun protection is required based on its presence in a formulation.

Polymethylsilsesquioxane

INCI: Polymethylsilsesquioxane

Polymethylsilsesquioxane (PMSQ) is a synthetic silicone resin powder formed by the hydrolysis and condensation of methyltrimethoxysilane. It exists as ultra-fine, white, spherical particles (typically 4–6 microns) with excellent flow and water-repellent properties. In cosmetics it functions as a soft-focus agent, texture enhancer, and sebum absorber, creating a silky, blurring effect on skin while temporarily filling and diffusing the appearance of fine lines and pores.

Is Polymethylsilsesquioxane safe? Key considerations

Can Polymethylsilsesquioxane cause irritation?

Low Risk

The Cosmetic Ingredient Review (CIR) Expert Panel concluded that polysilsesquioxanes are safe in cosmetics at present practices of use and concentration. The ingredient is non-toxic and non-irritating to skin and mucous membranes; rare eye irritation has been noted if powder contacts the eye directly. Well tolerated by most skin types including sensitive skin. No EU CosIng Annex II or III restrictions apply.

Does Polymethylsilsesquioxane increase sun sensitivity?

No Risk

Polymethylsilsesquioxane does not contain photosensitising compounds and does not increase UV sensitivity. No additional sun protection is required based on its presence in a formulation.

Is Polymethylsilsesquioxane safe during pregnancy?

Caution

The CIR Expert Panel found no published developmental and reproductive toxicity (DART) data for polysilsesquioxane ingredients. The ingredient is not absorbed transdermally due to its large particle size, which limits systemic exposure. It is generally considered low risk, but consult a healthcare provider if concerned, as specific pregnancy safety data is absent from the published literature.

How does Polymethylsilsesquioxane work?

Individuals with known silicone allergy (rare), eye area application with loose powder formats should review the considerations above before use.

Polymethylsilsesquioxane

What does this do in a formula?

Is Polymethylsilsesquioxane safe? Key considerations

Can Polymethylsilsesquioxane cause irritation?

Does Polymethylsilsesquioxane increase sun sensitivity?

Is Polymethylsilsesquioxane safe during pregnancy?

How does Polymethylsilsesquioxane work?

Which products contain Polymethylsilsesquioxane?

Bio-Active Ceramide Moisturiser