Hair Oil contains a single D2, water-soluble silicone called Dimethicone to meet our performance standards for shine (high) and weight (low). Dimethicone is also noncomedogenic, meaning it won't clog pores. The silicone substitutes Hair Oil contains include Isodecane to protect from moisture loss, Coconut Alkanes (Ecocert-certified) with similar light-reflecting properties to silicone, and Heptyl Undecylenate derived from castor oil.