Acrylates/Polytrimethylsiloxymethacrylate Copolymer

Acrylates/Polytrimethylsiloxymethacrylate Copolymer is a synthetic polymer—a chain of linked molecules created through chemical synthesis. It combines acrylate compounds with silicone-based elements to create a material with both flexible and adhesive properties.

In skincare, this ingredient functions primarily as a film former, meaning it creates a thin, breathable layer on the skin's surface. This layer can help improve skin feel, provide temporary smoothing effects, and enhance the adherence of other formula components. It also conditions the skin by reducing moisture loss through this protective coating.

When applied to skin, this copolymer dries to form a continuous, flexible film across the surface. The acrylate component provides adhesion, whilst the silicone element contributes elasticity and breathability. This combination allows the film to move with skin without feeling rigid or uncomfortable.

The polymer is designed to be removable—it can be washed away with cleansing without disrupting the skin barrier or leaving residue. The breathable nature of the film is significant; unlike occlusive coatings, it allows some moisture vapour to pass through, making it suitable for regular skincare use.

This ingredient is typically present in small amounts (around 0.5% or less) and requires no special usage instructions. Products containing it can be applied as directed by the specific formulation. Allow products containing film formers to dry fully on skin for optimal effect. It can be used daily as part of your routine, but always cleanse thoroughly at the end of the day to remove the film.