A pastry brush or basting brush is a tool use to spread oil or glaze on food. Traditional basting brushes are made of plastic fiber similar to paint brushes, while modern pastry brushes are frequently made out of silicone. In roasting meats, a basting brush will be used to sop up juices or drippings from under pan and spread them on the skin of the animal to crisp the skin. In baking breads and pastries, a pastry brush is used to spread a glaze on the crust or surface of the food.