Yes, Elf Poreless Face Primer is silicone-based. Silicone is used in many cosmetics as it provides a smooth and even texture to the skin, creating a perfect canvas for makeup application. Silicone also helps to minimize the appearance of pores and fine lines, giving the skin a flawless finish. Elf Poreless Face Primer contains a blend of silicone, plant extracts, and vitamins that work together to smooth and blur the appearance of pores, leaving skin looking smoother and more even-toned.