Our aluminized ceramic fabric is good up to 2000 degrees F and you get 2 running yards, 40" wide. It is used in the molten metal industry to protect duct work where molten metals are being poured.  I think it's safe to say probably good enough for our Interceptors. First we cover all of the firewall, heater box and footwells with foam (two foam kits available, 1/2 inch and 1/4 inch - Part Numbers P49/22 and P49/23) and then this cloth. Use good quality upholstery contact cement to adhere and you'll keep the radiant heat out of the cabin!