Emseal QuietJoint

Acoustic Partition CLosure EMSEAL QuietJoint SHH PartitionToMullion small
Mass Loaded Partition To Window Closure EMSEAL QuietJoint SHG Window To Partition small
QuietJoint 2sided 154
QuietJoint 3sided 154

Emseal QuietJoint is a sound, draft, heat, cold, and dust blocking acoustic partition closure and joint filler for interior, non-moving joints and gaps.  It is a non-mechanical, high-STC (Sound Transmission Class), non-invasively anchored closure that quickly and easily mates partitions to windows, mullions, or stud walls.

It is colourized, versatile, and ideally suited as a closure for gaps between the ends of permanent, semi-permanent, or movable partitions, window-wall, curtain-wall, head-of-wall and other conditions.

QuietJoint features a mass-loaded fire-resistant foam core coated with commercial-grade silicone. The foam core is a custom-density open-cell foam infused with a fire-resistant, acrylic-based mass-loading agent.


  • End of partition to mullion (SHH 2-sided coating)
  • End of partition to window (SHG 3-sided coating)
  • End of partition to wall (SHH)
  • Head of wall (SHH)
  • To block any flanking path
  • To fill construction-created voids and gaps


  • Mass-loaded acoustic seal (STC-53, OITC-38, ASTM E-90)
  • Fire-resistant (Smoke and Flame Spread Class A, ASTM E-84-12)
  • Insulates (R-value 2.85/in depth, ASTM C-518-04)
  • Sound attenuating
  • Non-mechanical
  • Non-metallic
  • Rapid installation - new or retrofit
  • Non-invasive anchoring
  • Aesthetically and practically versatile
  • Easily handles curves
  • Helps control HVAC balance between rooms

Material Configuration

  • QuietJoint comes coated on either 2 sides (SHH) or 3 sides (SHG).
  • SHH (two-sided silicone) is ideal for gaps between opaque or solid partitions, walls or mullions.
  • SHG (three-sided silicone) is typically used to fill gaps between the glass of curtainwall or windows on one side and solid substrates on the other. The third coating aesthetically covers the foam core so that the foam is not visible from the outside through the glass.
  • QuietJoint is supplied in full-story, 3 metre (10 foot) lengths, and is shipped in loosely laid coils inside a cardboard box.
  • The material is sized to be approximately 10% larger than the field-measured joint width.

Insulation Value

  • QuietJoint helps to control HVAC balance and energy loss between rooms
  • The R-value of QuietJoint foam is R-2.848/inch of depth

Performance Limitations

  • Over compressing QuietJoint can result in backpressure that could exceed the ability of certain substrates to resist this pressure. User is assumed to have tested all applications to ensure suitability for use
  • With SHG the coating can be the same colour on all three faces or different on each face to coordinate with wall coverings. (Note: colour transitions between different colored faces may blur)
  • Not intended for use in moving joints or traffic areas - for watertight, moving structural joint gaps contact Allco



QuietJoint - Safety Data Sheet


QuietJoint - Install Data


QuietJoint - Tech Data - Allco


The Emseal Checklist