Glyceryl Undecyl Dimethicone

What is Glyceryl Undecyl Dimethicone?

Glyceryl undecyl dimethicone is a synthetic hybrid molecule combining a glycerol moiety with undecyl dimethicone, an alkyl-modified polydimethylsiloxane silicone polymer. This structure imparts both hydrophilic and lipophilic properties, making it ideal for cosmetic formulations like creams, lotions, serums, and makeup products. It functions by stabilizing oil-in-water or water-in-silicone emulsions through interfacial film formation, reducing surface tension for better spreading, and depositing a lightweight, flexible film on the skin or hair. This enhances product texture, wearability, and resistance to water or rubbing, while delivering a non-greasy, silky feel without heaviness.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 1 View on EWG →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Film former
Creates a continuous film on skin or hair to improve wear, water resistance, transfer resistance, shine, or hold in sunscreens, makeup, and styling products.
Surfactant
Lowers surface tension to enable cleansing, emulsifying, and foaming; central to shampoos, body washes, and many emulsions and micellar systems.
Emulsifying agent
Enables stable mixing of oil and water phases by forming an interfacial film, helping create lotions, creams, and cleansers with consistent texture.

Benefits

Provides a protective, breathable film that improves product longevity and skin feel.

Enables smooth blending of ingredients for even application and consistent texture.

Supports cleansing and emulsification for effective yet gentle formulations.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit Who Should Avoid
Individuals seeking lightweight moisture barriers in daily moisturizers.
Those preferring silicone-free or natural-only products.
Users of long-wear makeup or sunscreens needing transfer resistance.
Individuals with rare silicone sensitivities.
People with sensitive skin preferring non-comedogenic emollients.
People avoiding synthetic polymers in routines.

Safety Notes

  • Considered low hazard with minimal risk of irritation or sensitization.
  • Non-comedogenic, suitable for acne-prone skin types.

Frequently Asked Questions about Glyceryl Undecyl Dimethicone

What does Glyceryl undecyl dimethicone do in products?

It emulsifies oil and water phases, forms protective films, and acts as a surfactant for better texture and performance.

Is it safe for sensitive skin?

Yes, it has a low hazard rating and low irritation potential from cosmetic safety assessments.

Does it clog pores?

No, it has a comedogenic rating of zero, making it suitable for all skin types.