The Gas Grill Splatter Mat is a 30-inch by 48-inch flexible pad, composed of two non-woven fiber materials separated by a patented barrier media that protects surfaces from grease and sauce drippings. The materials are 100% recyclable and unlike similar products on the market today, the non-woven surface areas of the splatter mat will not bond or adhere to composite decking. 30-inch by 60-inch size also available for larger gas grills. Please note: We continue to test new deck products for compatibility with “The Gas Grill Splatter Mat,” and they are compatible with many of the composite product and exotic woods we have tested. The Mat will not stick to a composite deck surface as it contains no rubber backing material. As with any object resting in one place for extended periods, weather and exposure conditions of the area protected by “The Gas Grill Splatter Mat” will differ from the surround area not protected by the Mat. Therefore, you may notice differences in appearance between the area directly under “The Gas Grill Splatter Mat” and surrounding, unprotected areas upon removal of the Mat. With proper maintenance, you will have no trouble keeping your Mat and deck in great shape for many years!