... product 1/2-1/5 2, heat-resistant than the cement pressure plate, gypsum board high 400-600 °C, the ... thermal conductivity, high temperature work to reduce heat loss. 2, than other inorganic insulating board strength. 3, can withstand high temperatures ... thermal conductivity, high temperature work to reduce heat loss. 2, than other inorganic insulating board strength. 3, can withstand high temperatures ...