AK TRADING CO. Sound Damping Products, Charcoal, 1.5" X 24" X 18" (EGGCRATE-24x18x1.5_CHX)

Is the material self adhesive or do you need to provide your own adhesive? If so, what did you use? Thanks,

Does this soundproof a room, even alittle bit?

The order comes with only 1 sheet or 2 sheet?

Is this open cell or closed cell foam?