dB-Bloc is a heavy mass loaded vinyl. Simply cut to fit the cavity size of your wall using a straight edge and utility knife, and anchor mechanically to your surface using a staple gun, sheetrock screw, or other method. Do not use glue, this material is too heavy. Then apply your firring strips or resilient channels over the top of the material and your final layer of drywall. For added value, you could opt to layer dB-Bloc between two sheets of drywall and apply to your disconnected wall surface. Remember that anything you do to add and vary the densities, thicknesses and dead air gaps in your common surface treatment, the better your results will be.
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