The problem of establishing a sound seal around piping passing through walls has always been difficult.  Normally a sleeve is left in the wall and the pipe passed through later.  The periphery is eccentric, so fiberglass packing becomes makeshift and caulking even more nebulous.  Only a skilled, supervised worker can do the job properly.  The SWS acoustical wall seal is a simple positive device that does an excellent job and presents a neat appearance.  Installation is simple as described below.

Mason Type SWS Datasheet

INSTALLATION PROCEDURE

If pipe is in place before wall construction:
1. Clamp SWS in place around pipe.
2. Build or pour wall around SWS.
3. Pack concrete around SWS and caulk any cracks.

If hole is broken or left in wall:
1. Pass pipe through opening.
2. Clamp SWS in place.
3. Pack concrete around SWS and caulk any cracks.

Mason Type SWS Datasheet