Graphite sponge is a low-density, compressible fireproof and heat-insulating product. The product has a low expansion multiple, and after expansion, it can produce a compact carbon layer with good heat-insulating properties. It is suitable for fireproofing large through holes, such as cable tray through holes and ventilation duct through holes.

Thickness：10~200 mm

Length ：≤1000 mm

Density：100kg/m3

Free Expansion Times：450℃，15min

Volume  ≥1 %（moisture content）

Activation Temperature: 200℃