Acrylates/Dimethicone Copolymer

Acrylates/Dimethicone Copolymer is a film-forming rheology/texture polymer used at low concentrations (typically well under a few percent) to improve slip, water resistance, and wear. As a high–molecular weight, non-volatile polymer, it has minimal skin penetration and is generally non-irritating in patch testing and real-world use; reactions are uncommon and usually relate to occlusion or individual sensitivity rather than intrinsic chemical reactivity. Given its broad tolerability even in sensitive skin but acknowledging rare irritation in highly reactive/eczema-prone patients, a very gentle score is appropriate. Safety Notes: In commercial leave-on products (serums, primers, sunscreens), Acrylates/Dimethicone Copolymer is often used at very low levels (~0.05–0.3%) as a film former to improve slip, wear, and water resistance, with similar low levels also appearing in rinse-off cleansers for sensory/anti-redeposit effects. High-strength consumer-available products (long-wear primers, blur/mattifying bases, transfer-resistant sunscreens, and water-resistant makeup) can push it into the ~2–8% range to build a more continuous film and stronger payoff; above this, texture, pilling risk, and formulation viscosity typically become limiting.