What it is
Glyceryl undecyl dimethicone is a dimethicone backbone modified with an undecyl linker and a glyceryl (glycerin) group, giving it both silicone smoothness and a degree of water affinity. This structure lets it spread easily, leave a light non-greasy feel, and help condition the skin surface. It appears in sunscreens and moisturizing bases where a soft silicone finish is desired.
Safety & warnings
Modified dimethicones of this type are generally considered well tolerated, low-irritancy, and non-sensitizing at cosmetic use levels. It is not a recognized fragrance allergen.
Origin & sourcing
A synthetic silicone derivative made by attaching a glyceryl group to a dimethicone polymer.
Questions everyone asks
Is this a silicone?
Yes. It is a dimethicone-based silicone that has been modified with a glycerin group to add a more hydrophilic, conditioning character.
What does it feel like on skin?
It typically gives a light, smooth, non-greasy slip while helping condition the skin surface.