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Closed-Cell Foam Blocks for Sound Insulation: SoundAway Mat SoundAway Mat, 2" x 4' wide, price per linear foot

SoundAway Mat, 2" x 4', is a high density, soundproofing closed cell foam designed to block and absorb sound. Maximum sound reduction across a wide range of frequencies.

Our Price: $32.50

Window Plugs for Soundproofing

In most cases, installation is as simple as cutting the 2" SoundAway Mat to fit inside the window frame. The width and length needs to be cut approximately 1-1/2" greater than the width and height to allow the plug to fit tight inside the window opening. For windows larger than 3', in either width or length, may require support to keep the plug in place. This page describes the installation procedure for small and large windows.

Click here to download installation instructions for large windows SoundAway Window Plug Installation


  • Straightedge
  • Measuring Tape
  • Sharp knife or electric carving knife
Small Windows
A small window is loosely defined as smaller than 3' x 3' or 4' x 2'.


  • Measure width across the opening of the window frame
  • Measure length from the base of the frame opening to the top
  • Measure both ends of the Mat, before cutting, to ensure a straight cut
  • Trim window plug 1-1/2" greater than width
  • Trim window plug 1-1/2" greater than length
  • Insert window plug into window frame
  • For larger windows refer to next section

Large WindowsSoundAway Window Plug Backer Board

  • For large window plugs, typically greater than 3' in either width or length, add support
  • Select a lightweight, rigid, board such as 1/4" thick plywood to use as a Backer Board
  • Optional, install 2 drawer handles on Backer Board for ease-of-useTrim Baker Board 1" less than width
  • Trim Backer Board 1" less than length and width
  • Apply adhesive, 3M 27 spray or similar, on the back of the window plug and on the Backer Board
  • Center and adhere window plug to Backer Board
  • Alternate to Backer Board: Use one or two tension rods (used to hang shower curtains) across the width along top or bottom or both