Mica Board Insulation Sheet Mica Board can be utilized on a variety of applications due to its thermal and electrical insulation properties: high voltage applications, extruders, heat barriers, and dies. Unique properties include resistance to electric arc and erosion, pressure resistance, and its non-permeability to high-frequency waves. Mica Board is the ideal replacement for asbestos-cement plates. Mica Board provides rigid insulation around mold perimeters, between molds and platens, heat barriers, or on sheet dies. IDEAL FOR: Mold perimeters Heat Barriers Molds and platen Sheet dies BENEFITS Heat resistant up to 930˚F FLow thermal conductivity Resists oil & moisture High pressure resistant Asbestos-free