Polyurethane-115 is a urethane polymer that is made by reacting a pre-polymer of Epsilon-Caprolactone and hexamethylene carbonate with Bis-Hydroxypropyl Dimethicone, Neopentyl Glycol, and Isophorone Diisocyanate. The resulting polyurethane is then capped with Hydroxypropyl Methacrylate.