Best For Skin Types
All, Oily, Combination
Usage Frequency
Daily
What Is Silicone Quaternium-20?
Silicone Quaternium-20 is a silicone-derived conditioning ingredient that belongs to a larger family of silicones widely used in skincare since the 1940s. It is designed to coat the skin surface, creating a smooth texture without leaving a heavy or greasy residue.
This ingredient functions as both a skin and hair conditioning agent. Its primary role in skincare formulations is to improve the sensory experience and tactile finish of products, making them feel pleasant to apply and wear throughout the day.
How It Works
Silicone Quaternium-20 works by forming a thin, lightweight layer on the skin. Unlike heavier occlusive ingredients, silicones are designed to provide a conditioning benefit whilst maintaining a breathable, non-staining finish. The quaternium component gives the molecule a positive charge, which allows it to adhere more effectively to the skin surface.
Clinical Evidence & References
Silicones have been used in pharmaceutical and medical applications for decades, including in life-saving medical devices and topical formulations, which supports their established safety profile. Approximately 60% of modern skincare products contain some form of silicone, where they are recognised as safe conditioning agents that deliver a pleasant sensory profile.
However, published clinical evidence specifically evaluating Silicone Quaternium-20 and its direct skin benefits in skincare products is limited. Most research focuses on the safety and tolerability of silicones as a class rather than individual silicone compounds.
How to Use
This ingredient is typically used as part of a complete formulation rather than as a standalone active. It is compatible with most skincare routines and does not require special handling. If using multiple silicone-containing products, observe how your skin responds, as layering silicones may create a heavier finish on some skin types.
Safety & Precautions
Frequently Asked Questions
From the Clinic
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A silicone-based conditioning agent that smooths hair fibre and reduces static
Silicone Quaternium-21
A silicone-based conditioning agent that smooths and softens skin texture
Silicone Quaternium-22
A silicone-based conditioning agent that smooths and protects hair
Silicone Quaternium-24
A silicone-based conditioning agent that creates a smooth, non-greasy feel
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