Sealant for gas home heater

[rfj62]

My home gas forced air unit wasn't working so I had to do some digging into the innards of the heater. I had to open up the chamber where the pilot light and burner are, there was a orange strip of sealant between the 2 metal pieces. So what sealant do I need to use to seal it back up? Do I just need RTV or do I need some special heat resistant stuff? Thanks, Jeff

 

[Toyo FJ40]

High temp RTV , usually red is what you need.