Silicone Quaternium-28

Silicone Quaternium-28 is a silicone-derived ingredient that belongs to a class of compounds used in cosmetics since the mid-20th century. It functions as a conditioning and film-forming agent, designed to coat the surface of hair and skin fibres to improve texture and appearance.This ingredient is classified as a hair conditioning agent and is commonly found in formulations across the skincare and haircare industries. It contributes to the characteristic silky, smooth feel that many modern skincare and haircare products aim to deliver, without leaving a greasy or occlusive residue.

Silicone Quaternium-28 works by forming a thin, protective layer over the skin or hair surface. This coating smooths the outer texture, fills in minor irregularities, and creates a refined appearance without penetrating deeply into the skin.The quaternium component gives this silicone a slight positive charge, which helps it adhere to and condition the surface more effectively than unmodified silicones. This allows the ingredient to remain in place longer and provide a more durable smoothing effect.

This ingredient is typically found in formulated products rather than used as a standalone treatment. It is best applied to clean, dry skin as part of your regular skincare routine. Allow the product to fully absorb before applying additional layers or makeup. If using multiple silicone-based products, monitor how your skin responds, as layering can occasionally lead to buildup in those with very sensitive or congestion-prone skin.

Silicone Quaternium-28 is generally well-tolerated and considered safe for topical use in cosmetics. Those with silicone sensitivity or prone to product buildup should patch-test before full application.