Composite material of silicone cured to the surface and weave of a high temperature fiberglass substrate, weighing .72 lb/sq ft with a total thickness of .070″. Because the silicone attaches itself to the textile, there is no separation, and no flow of air or liquids through Koolmat. It has great resistance to abrasion, radiant heat, gasses and oils, no matter what temperature. The silicone side will withstand continuous temps up to 500ºF; the fiberglass side to 1100ºF. Flexible and easy to install. Meets requirements of FAR 23.853(a) for flammability. Kool Mat also is an excellent sound deadener, reducing noise by 23db. .070 thick x 30″ wide, sold by the running ft.