Reporting question for Fiberboard - Vulcanized, 3" x 15", .062" Thick

Product:
Fiberboard - Vulcanized, 3" x 15", .062" Thick

Question:
What operating temperatures can this product handle? Can this be used as a base for resistor assemblies?

Answer:
I don't have an exact rating on operating temperatures for this product. However, this fiberboard is very commonly used in guitar amplifiers where high voltage caps and resistors are mounted.