Just go get the product designed for soldering copper pipe in plumbing
section at a hardware store. It's usualy fiberfrax with a AL backing.
I made an electric brass melting furnace using the commercial stuff as
insulation instead of refractory.
Karl


On Sep 26, 12:56 pm, Louis Ohland wrote:
I'm looking for something that will not transfer heat very well so
something can be brazed on it without significant heat loss. Would
carbon fiber stand up to a MAPP torch?