B2 Grade Blend Polyol Spray Rigid Polyurethane Foam for Building External  Wall Insulation - China Polyether Polyol, Polyurethane Foam

B2 Grade Blend Polyol Spray Rigid Polyurethane Foam for Building External Wall Insulation - China Polyether Polyol, Polyurethane Foam

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Rigid High B2 Grade Fireproof Isocyanate Polyol Polyurethane Foam

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