... bonding 4. Good compressive 5. Anti-corr PU Insulation Core Reinforced FRP Sandwich Panel (China Best) for Cold Room Refreezer Typical ... ) •No joins (to breed bacteria)Structure: FRP skin + PU (Polyurethane foam) + FRP skin Bonding technology vacuum with high ... Warm / dry compartment, large span structure, roof, walls, thermal insulation (or fire) plant, purification plant, high profile portfolio of ...