I used 1/8" thick fiberglass tape from McMaster-Carr. The stuff I used for the door was about 2.5 inches wide, but they have narrower widths if you want it. I got the kind with sticky backing, and it holds up just fine under heat.
http://www.mcmaster.com/
They call it "Slotted Fiberglass Seals"
8813K31 is the 1" wide stuff
There might be something better out there but this stuff worked perfectly.
Steve