PEG-8 Methyl Triethoxysilane
What PEG-8 Methyl Triethoxysilane is & what it does
PEG-8 Methyl Triethoxysilane is a silicone-PEG hybrid that combines a water-compatible PEG chain with a silane group. It is commonly used as a wetting and dispersing aid, particularly to help disperse pigments and mineral powders such as titanium dioxide or zinc oxide in sunscreens and color cosmetics. The silane portion can also bond to powder surfaces, improving smoothness and stability. It is not itself a UV filter and has no flagged concerns here.
What is PEG-8 Methyl Triethoxysilane?
It is a silicone-PEG hybrid that pairs a water-compatible PEG chain with a silane group. It is commonly used as a wetting and dispersing aid in formulas.
What does PEG-8 Methyl Triethoxysilane do in sunscreen?
It helps disperse pigments and mineral powders such as titanium dioxide and zinc oxide evenly, which improves smoothness and stability. It is not itself a UV filter, it is a formulation aid that supports the actives.
Is PEG-8 Methyl Triethoxysilane safe?
It is generally considered a low-concern dispersing ingredient, with no specific risks flagged for it in this catalog.
Sunscreens with PEG-8 Methyl Triethoxysilane
We rate 4 sunscreens that contain it:
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Dr Cynthia Bailey Sheer Strength Pure Physical™ Tinted Matte Sunscreen, Spf 50
77/100
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Dermaprotect Daily Defense Broad Spectrum Spf 50+
76/100
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Cane + Austin Prime + Protect Mattifying Primer With Spf 50
76/100
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REPLENIX Ultimatte Perfection Spf 50+
76/100