im taking on the task of building a big 6x4x4 double walled smoker, now heres my question, insulation? is this a good enough insulation between the walls?
I contacted Thermafiber's technical support and was told it is made from molten slag. When melting iron the impurities rise to the top and form slag. This byproduct is heated to a molten state and spun forming the microfibers. The same process is used for making fiberglass only glass is used.
Thermafiber would not say if it is safe for food or not. They said Owens Corning does the manufacturing and could be reached at 1-800-get pink.