Gensin soundproof polycarbonate sheet, has high impact resistance light weight and ... heat: 1.16J/kgk 13) Heat deflection temperature: 140oC 14) Soundproof index: 4mmthickness--27dB, 5mm--28dB, 6mm--29dB, 8mm--31dB, 10mm ... 34dB Applications: Soundbarrier for highwayrailroad, soundbarrier for residential, etc. Tag: Soundproof PC Sheets, Polycarbonate Sheets Learn more about products detailed description ...