Silmer UR-5050 (INCI: Bis-Hydroxypropyl Dimethicone/SMDI Copolymer) is a versatile silicone-urethane resin that provides stay-in-place properties, imparts water-repellency and adds softness, all while maintaining flexibility. It displays compatibility with organic ingredients, elicits uniform coverage and aids with moisture retention. It is ideally suited for lip applications.