Sealing the edges of your pie dough keeps delicious juices from bubbling out and helps to keep your oven clean at the same time. Pastry chef Carolyn Weil demonstrates how easy it is to crimp or flute the edges of a berry pie.Sealing the edges of your pie dough keeps delicious juices from bubbling out and helps to keep your oven clean at the same time. Carolyn Weil, a professional baker and author who focuses on making baking approachable for the home cook, demonstrates how easy crimping or fluting the edges of a berry pie can be. For more of Carolyn’s baking tips, see the related videos on this Web site.