Trimethylsiloxysilicate
A silicone film-forming resin. It gives a lasting water-resistant layer and keeps makeup and SPF on skin. Inert to 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
About this ingredient
Trimethylsiloxysilicate (INCI: Trimethylsiloxysilicate) is a film-forming silicone resin. As it dries it leaves a thin, flexible, water-resistant layer that sets makeup, lip color or sunscreen and improves how long they last. It is a functional component, not a treatment active. Its role is durability and resistance to water and rubbing, not skin care. It gives a long-wear finish and a light feel, but it does not hydrate or treat. It is inert on skin and has no systemic uptake topically, so it can be used during pregnancy and breastfeeding. Tolerance is high: low irritation potential and low allergy risk, fine for sensitive skin. It adds no relevant comedogenic load. Since it is a water-resistant film, it is worth removing thoroughly at the end of the day with a suitable makeup remover so it does not build up.
Frequently asked questions
Is Trimethylsiloxysilicate safe during pregnancy?
Trimethylsiloxysilicate is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
What skin types is Trimethylsiloxysilicate for?
Trimethylsiloxysilicate suits: normal, dry, combination, oily, sensitive.
What is Trimethylsiloxysilicate and what does it do in cosmetics?
A silicone film-forming resin.
What's the INCI name for Trimethylsiloxysilicate?
The INCI name is Trimethylsiloxysilicate.
See Trimethylsiloxysilicate 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
Tripropylene Glycol, Tris Buffered Saline, Tris(Tetramethylhydroxypiperidinol) Citrate, Trisiloxane, Ceteth-20, Hydrogenated Castor Oil, PEG-45 Palm Kernel Glycerides, Sclareolide
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