Crayola® Model Magic® can be sealed once your piece is completely dry. It generally takes 24 hours to dry to the touch; 72 hours to dry completely. Once dry, an acrylic varnish can be used. We recommend testing its compatibility before applying it to a finished piece. Sealing your work will not waterproof it. Exposure to water and outdoor elements will have a negative effect on Model Magic, so we recommend displaying your sculpture indoors.
If you have additional questions, we would love to hear from you! Feel free to call or text us at 1−800−272−9652 weekdays between 9 AM and 4 PM Eastern Time.