Bought as bundles of 6 panels per case. Roxul Rockboard 40LT 4lb density acoustic insulation is used to construct broadband acoustic panels and bass traps.
Mineral Wool Insulation in 4lbs per unit density.
Nice as Acoustic insulation or as a soundproofing subject matter
Price effective and Very Top NRC Rating, higher than Owens Corning 703
Water repelling – hydrophobic- Magnificence A fireplace rating
Rigid Boards, very best for making acoustic panels and bass traps