... steel 2.Inside material:good fireproof polyurethane 1.The introduction of polyurethane cold storage wall panelsThicknessColored Galvanized Steel Sheet :0 ... ),Light weight, reducing the weight of whole roof and the building cost.3),Treatment of waterproof, which is simple, convenience ... and better.4), Mildewproof, high ability of acid and alkali-resistance.5),Dry work, which can’t ...