Silicone derivatives like dimethicone dominate beauty products for their silky texture and occlusive properties.

Pros:

Creates a protective barrier on skin/hair, locking in moisture.

Improves product spreadability.

Non-comedogenic in low concentrations.

Cons:

Environmental persistence: Accumulates in ecosystems.

Potential scalp buildup causing hair dryness.

Biodegradability concerns led to EU restrictions on cyclomethicone.

Brands like Dove and L’Oréal now blend silicones with plant oils to balance performance and sustainability.