Glyceryl Undecyl Dimethicone

Glyceryl undecyl dimethicone is a silicone-based conditioning agent belonging to the dimethicone family. It is derived from silicone chemistry and functions as a film-forming ingredient, meaning it deposits a thin, continuous layer on the skin's surface.This ingredient is used primarily for its ability to improve the texture and feel of skincare formulations whilst providing a protective barrier effect. It is found in a relatively small percentage of skincare products, typically at concentrations below 1%.

Glyceryl undecyl dimethicone works by depositing a thin, occlusive film across the skin's surface. This film acts as a barrier, reducing water evaporation from the skin whilst also creating a smooth, refined appearance by filling minor surface irregularities.Because it sits on top of the skin rather than penetrating it, the ingredient is particularly useful in formulations designed to provide immediate texture improvement and hydration retention without affecting skin permeability significantly.

This ingredient is typically formulated into serums, creams and moisturisers at low concentrations. Because it is a film-former, products containing it should be applied to clean, slightly damp skin to optimise hydration retention. It can be layered beneath other treatments, though some users may prefer to use it as a final step to lock in previous products.

Glyceryl undecyl dimethicone is generally well-tolerated and considered safe for topical skincare use. It is non-comedogenic at typical usage levels, though individuals with silicone sensitivity should patch-test first.