The space around pipes passing through wall, floors and ceilings is often packed with fibreglass and caulked to prevent sound transmission. Efficiency is too dependent on field conditions and supervision.

We suggest a factory fabricated split seal clamped around the pipe with closed cell neoprene sponge as the filler. The seal is placed before the concrete pour or an opening is formed to be back packed later.
Fibreglass is used when temperatures exceed 225°F (107°C).


Where pipes pass through structural openings, the space shall be sealed by a 2 piece clamp lined with 3/4”(19mm) thick Neoprene Sponge. Concrete or block shall be poured or built around the clamp or back packed with concrete. 10 Lb. density fibreglass with caulked ends will replace the sponge where temperatures exceed 225°F (107°C).

Seals shall be type SWS as manufactured by Mason Industries, Inc.