Blend Polyol, Flame Retardant, Polyether Polyol manufacturer / supplier in China, offering B2 Insulation of Building External Wall Building Wall Insulation Spray Rigid PU Foam Blend Polyol (SDP1222), 0 Odp Rigid PU Foam Spray Insulation of Polyethylene Winding Prefabricated Directly Buried Pipes Blend Polyol (2207), 0 Odp Hfo Blowing Agent Blend Polyol Insulation Closed-Cell Medium Density, Spray Applied, Rigid PU Foam (SDP1237) and so on.