... SOUND INSULATION, 3.HIGHLY WATERPROOF, 4.LONG SERVICE LIFE. EPS sandwich panel:Technical functionUnitIndexQualificationFibre averagediameterμ m4-7GB/T13350-92Densitykg / m 37-18GB ... -700 Moisture rate% < 5 Detailed parameters:1. Composition: Core materials: EPS, Rock wool, Glass wool, Surface materials: PPGI, GI, Stainless steel ...