The Silicone Appli-Fuse Mat is made of a silicone and glass fiber material that is heat resistant up to 500 degrees F (260 degrees C.). That means it is the perfect surface for all of your fusing, ironing, and gluing needs. Fusible Applique Place the applique design under the Appli-Fuse mat. Since the mat is transparent, the cut applique shapes can be placed perfectly. Since it is heat resistant, multiple layers can be placed simultaneously and pressed with a hot iron. The layered appliques can then be picked up as one piece and placed on the background fabric. An added bonus? The mat is slightly tacky so the pieces won?t migrate when positioned. Glue Guns Since the Appli-Fuse mat can withstand temperatures up to 500 degrees F. (260 degrees C.), it is the perfect working surface whenever using a glue gun. Any globs of glue will flake off easily and protect the table underneath. Cleaning Clean the mat with soap and water or place it in the dishwasher.