Fire retardant foam insulation also blocks noise at a pipe chase (C) Daniel Friedman Acoustical Sealant Choices
Sound control in building includes isolating sound transmission pathways

  • ACOUSTICAL SEALANT CHOICES - CONTENTS: who supplies acoustical sealants? List of acoustical sealant suppliers.Use of acoustical sealant for the lap joints between sheets of polyethylene vapor barriers in buildings. Use of & sources for tapes to seal poly vapor barrier joints. Solar Age Magazine Articles on Renewable Energy, Energy Savings, Construction Practices
  • POST a QUESTION or READ FAQs about using acoustical sealants in buildings for moisture control and for sound control

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Acoustical sealants:

This article explains the use of acoustical sealants for sealing lap joints between polyethylene vapor barriers & sources of acoustical sealants. Our page top photo illustrates use of a fire-retardant foam used at a drain pipe penetration through building walls and floors - a step that also improves sound insulation.

Our second photo (below) shows how we finished the plastic pipe chase with foam insulation to stop noise transmission into the occupied building space.

Sketch at page top and accompanying text are reprinted/adapted/excerpted with permission from Solar Age Magazine - editor Steven Bliss.

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Use of Acoustical Sealant for Sealing Vapor Barriers on Interior Walls

Foam insulation also blocks noise at a pipe chase (C) Daniel Friedman

The question-and-answer article about the indoor use of acoustical sealants or tape products to seal vapor barriers, quotes-from, updates, and comments an original article from Solar Age Magazine and written by Steven Bliss.

Question: where do I buy acoustical sealants for use on poly vapor barrier lap joints?

The use of acoustical sealant for sealing lap joints between sheets of polyethylene vapor barriers was mentioned in Solar Age Magazine articles (November & December 1982).

Do you have any information as to acoustical sealant brand names, suppliers of acoustical sealants, or other products suitable for sealing poly vapor barrier lap joints?

Answer: sources of non-skinning, non-curing acoustical sealants for drywall & wall penetrations

Wood floor soundproofing schematic (C) Steve Bliss J Wiley InspectApediaThe acoustical sealant mentioned in those magazine articles is a non-skinning, non-curing sealant developed for sound control in drywall construction and in wall perforations (wall penetrations such as around electrical boxes).

One such acoustical sealant is available in one-quart cartridges from Tremco.

A variety of tapes useful in sealing polyethylene vapor barrier lap joints are available from Ideal Tape, Inc.

Their products include a clear polyethylene tape (#415) suitable for all-weather use, and a 2-mil aluminum tape (#488,487) for use with foil surfaces such as foil-faced solid foam insulating board.

And almost certainly, poly vapor barrier sealing tapes using foil, poly, or other materials are available from 3-M Corporation.

At SOUNDPROOFING MATERIAL PROPERTIES, Steve Bliss elaborates a bit about acoustical sealants used for sound proofing or noise control:

While special non hardening acoustical sealants are often specified in commercial work, any high-quality sealant that remains flexible can be effective in blocking sound transmission. Butyl, silicone, and urethane caulk can all be used.

To prevent sound leaks, use sealant around electrical boxes, plumbing penetrations, and any other penetrations in the wall or ceiling surface.

For walls with STC ratings in excess of 35, apply a flexible sealant at the joint where the drywall meets the floor.

Acoustical sealant is also used to seal around the perimeter of walls or ceilings hung from resilient channel.

Readers who need to know more about placement and sealing of vapor barriers should



Here we include solar energy, solar heating, solar hot water, and related building energy efficiency improvement articles reprinted/adapted/excerpted with permission from Solar Age Magazine - editor Steven Bliss.

Original Acoustical Sealant Article:


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