... 4 low performance of water imbibition Rock Wool Sandwich Board Materials:steel plate and mineral wool. Advantages:1.heat,sound insulation.2. ... Ships, metallurgy, electric power, construction and other industries.Our Rock Wool Panel mostly used for building wall, roof heat preservation sound ... well fire and noise reduction. Normal size:thickness of Rock Wool:50,75,100mm.upper plate :0.4-0.5mm,lower ...