... stability 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 ... well fire and noise reduction. Normal size:thickness of Rock Wool:50,75,100mm.upper plate :0.4-0.5mm ...