... and durability 4. High quality 1. EPS Sandwich wall panel brief introductions:EPS Sandwich wall panel uses colored steel plate as surface materal, ... help you cut cost and time dramatically.2)Light weight,Thermal&fire-proof,insulation,sound-proof,cold-proof ... protect the steel of panelslifetime15~20 yearsCharacterLight in weight, heat insulation, fireproof and waterproof, environmentalUsevarious roofs ...