Vp/Eicosene Copolymer

VP/Eicosene Copolymer is an inert, high–molecular weight film-forming polymer used at low levels (typically a few percent or less) to improve slip, wear, and water resistance, with minimal skin penetration. Clinical irritation and patch-test signals for this class of copolymers are generally very low, with reactions more often related to occlusion/feel than true irritancy. I score it 0.1 (not 0.0) because even “non-reactive” polymers can rarely trigger intolerance in severely compromised barrier states, but the intrinsic irritation potential is exceptionally low. Safety Notes: Vp/Eicosene Copolymer is most often used as a film former/texture aid in leave-on color cosmetics and skincare (e.g., sunscreens, primers, long-wear moisturizers) where it appears at low supportive levels around 0.1–1%. In higher-hold or more water-resistant consumer products (long-wear makeup, transfer-resistant sunscreens, styling-type skin films), real-world use can rise into the mid-to-high single digits, with specialty OTC formulations observed up to ~10–12% to maximize film integrity and wear. There is no specific EU/FDA maximum for this polymer in cosmetics; practical upper limits are driven by aesthetics, viscosity, and processing/stability rather than regulation.