Graphite polystyrene insulation board (SEPS), commonly known as "black foam". It is made of imported graphite modified polystyrene new material and new technology. It has all the performance of EPS insulation board in addition to the general, its fire performance to reach the inflammable B1 class, due to contain special graphite particles and infrared absorbent, can reflect heat radiation. Compared with polyurethane insulation materials, it has obvious cost advantage.