High Strength Rock Wool Board With high mechanical strength, the high-strength mineral wool broad is suitable for exterior thermal insulation of building -- roof and exterior wall, the production of color-steel sandwich board and other occasions where high mechanical strength is required. the density of high-strength mineral wool board: >120 kg/m3 Compressive strength: ≥40KPa (With 10% deformation) Delamination strength: ≥7.5KPa Other performance parameters: See page 12 All performance parameters comply with the requirements of ASTM C 612 / JIS A 9504 and other standards.