The brand name of an FDA-approved nonstick baking and countertop sheet produced by several manufacturers. It's made of silicone with a reinforced glass weave, does not require greasing and provides even heat transfer. Silpat is effective at temperatures ranging from 40°F to 480°F. It comes in several sizes, the most popular being 16 X 117⁄8 inches (fits in a jelly roll pan), 24½ X 16½ inches (for countertop use in rolling out doughs and such) and a 10¼-inch octagonal shape for microwave ovens. Silpat mats can be found at gourmet shops and many department store kitchenware sections.
From The Food Lover's Companion, Fourth edition by Sharon Tyler Herbst and Ron Herbst. Copyright © 2007, 2001, 1995, 1990 by Barron's Educational Series, Inc.