Hydrogenated Styrene/Isoprene Copolymer

Hydrogenated Styrene/Isoprene Copolymer is a synthetic polymer derived from petroleum-based raw materials. It belongs to a class of film-forming agents commonly used in cosmetic formulations to modify texture, consistency and stability.In skincare products, this ingredient functions primarily as a viscosity controller, helping to thicken formulations and maintain uniform texture. It also aids in suspending other ingredients evenly throughout a product, preventing separation and improving the sensory experience during application.

This polymer works by increasing the viscosity of a formulation, meaning it makes liquids thicker and more gel-like. When added to a product, the polymer chains interact with the surrounding ingredients to form a network that holds the formula together.Unlike occlusive ingredients that sit on the skin's surface, this polymer typically remains largely in the formulation matrix, helping deliver other active ingredients more effectively while maintaining product stability from manufacture through to use.

This ingredient is typically a background component in formulations rather than a standalone active treatment. It will be listed in the ingredient declaration, but its presence does not dictate how you should use a product. Follow the usage instructions provided for the overall formulation.

Generally well-tolerated in cosmetic concentrations. No significant skin irritation or sensitising potential is documented, though individual sensitivities are always possible.