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Fire Retardant 750ml 500ml 300ml B2 B3 Fire Class Fire Expandable Polyurethane PU Spray Foam, Find Details and Price about PU Foam Polyurethane Foam Manufacturing from Fire Retardant 750ml 500ml 300ml B2 B3 Fire Class Fire Expandable Polyurethane PU Spray Foam - Shanghai Junbond Building Material Co., Ltd.