Urban Decay Eyeshadow Primer Potion: Eyeshadow Primer Potion features space-age polymer technology that fills in any imperfections on the skin’s surface, prepping your lids for ALL-day shadow. This primer keeps your eyeshadow crease-free while making color more vibrant and providing a smoother application. Formulated with polymer technology, it fills in any imperfections on the skin’s surface, prepping lids for all-day wear. It glides on smoothly, blends beautifully on all skin tones, and dries on invisibly.