The Gas Grill Splatter Mat™ protects the surfaces under gas grills, covers existing stains, and is easy to clean. Composed of 2 non-woven fiber materials separated by a patented barrier media that protects surface from grease and sauce drippings. 100% recyclable. Will not bond or adhere to composite decking. Lightweight, durable non-woven polypropylene and polyurethane.