MUA Make Up Academy Pro Base Primer Oil 15ml MUA Primer oil is a super aborsbent oil based primer which will leave your skin with a flawless base. This product leaves a dewy finish to help your skin have a radiant look. Shake before use. Before makeup application, using fingertips, massage a few drops onto clean skin. Allow primer to absorb into skin before applying makeup. For an extra dewy finish, apply on top of makeup above the cheekbone.