Designed to work with sheets of plywood and drywall, our soundproof foam is available in 4'x8' sheets.  Easily installed with either a foam adhesive, or simply using pins in the corners, this foam is versatile and light weight.
 
The egg carton design allows sound waves to be absorbed into the foam, lessening the transfer of sound from one area to another.  Although this foam is not rated directly for soundproofing, we have sold it for years with a great success rate.