Working on a firebox for a small boiler and the plans call out for asbestos sheet to line it. Not real keen on lung cancer + cannot find a source for it anymore.
What is a modern replacement for 1/8" thick flat asbestos sheeting? (used to protect the aluminum firebox from the propane burners) Is there any sort of kiln brick that would work (I think I can easily modify the plans to use 1/4" liners if needed)