Trimethoxycaprylylsilane

What Trimethoxycaprylylsilane is & what it does

Trimethoxycaprylylsilane is a silane-based surface-treatment agent commonly used to coat mineral pigments and UV filters such as titanium dioxide and zinc oxide. In sunscreen formulas this coating makes the mineral particles more water-repellent and easier to disperse, which improves texture and spreadability. The treated particles tend to feel less chalky and blend more evenly on the skin.

Is Trimethoxycaprylylsilane safe?

Trimethoxycaprylylsilane is widely used to surface-treat mineral pigments and UV filters and is generally considered safe for use in cosmetics at typical levels. It is bound to particle surfaces in the finished product rather than acting freely on the skin. This is general information and not medical advice.

What does Trimethoxycaprylylsilane do in skincare?

It is a coating agent that treats mineral particles such as titanium dioxide and zinc oxide so they are more water-repellent and disperse more evenly. In sunscreens this improves texture and spreadability and helps reduce a chalky feel, supporting a smoother application.

Is Trimethoxycaprylylsilane natural or synthetic?

Trimethoxycaprylylsilane is synthetic. It is a silane compound made in a lab and is not derived from a plant or animal source.

Sunscreens with Trimethoxycaprylylsilane

We rate 27 sunscreens that contain it, showing the top 10 by overall score:

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