Our Sound Dampening Panels are made from high density polyester fiber, 300lbs per cubic yard, better Sound Insulation than other soundproofing foam panels! Our acoustic foam panels are sound proofing and flame retardant, odorless, non-toxic, non-slip, corrosion resistant, and fade resistant.o adhesive included. Our soundproof wall panels can be easily installed using construction adhesive and double-sided tape. Simply attach construction adhesive or 3M double-sided tape (not included) to the back of each soundproof foam and adhere in the desired position. Our panels will improve the acoustics at your bedroom, living room, home office, blog room etc.