A flowable media dispensing device is shown that includes a removable sealing device that seals a dispensing opening of the dispensing device when not in use, and is removed to expose the dispensing opening during application of the flowable media. The use of a sealing device permits the user to leave unused media such as drywall joint compound inside the dispensing device when not in use. The time consuming step of cleaning the dispensing device after every use is therefore eliminated. Further, media such as drywall joint compound that would previously have been wasted during the cleaning process is saved, providing more efficient use of the dispensing device.