... sandwich panel 1. Light weight, high strength, 2. Flat surface,heat insulation,cement-covered on surface Competitivle price building ... ratio;2,very low thermal conductivity factor3,high impermeability4,good compression resistanceTechnical performanceprojectperformanceCompression strength(kpa)≥ ... direct sunlight exposure for a long time. High Quality Cement Covered XPS Insulation Sandwich Panel