Tr
Trimethylsiloxysilicate
TrimethylsiloxysilicateBarrier
A silicone resin behind long-wear makeup and sunscreen — leaves a thin, water-resistant film that resists rub-off.
What it does
A silicone resin. As the lighter silicones it’s mixed with evaporate, it leaves a thin, water-resistant film that helps a product stay put and not rub off, so it’s common in long-wear makeup and sunscreen.
The evidence, graded
expert consensusUS safety reviewers (2013) assessed four silylates and siloxysilicates, which products use to bind, add slip, condition skin or thicken. Safety tests showed no skin irritation or allergy, and these large, inert molecules are unlikely to be absorbed. They judged all four safe as used in products made and delivered so they don’t irritate the airways or cause allergy there.Becker 2013 · International Journal of Toxicology ↗
Graded per the methodology: strong · moderate · emerging · expert consensus. A weak source on a strong claim gets the weaker label.
Browse all 1238 ingredients — grouped by what they do, each with whatever evidence we can cite.
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