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Treatment Strategy

  • Source Airborne

Application Use

  • Industrial In-plant
  • Industrial New Con.
  • Architectural Finishes
  • Architectural Walls/Ceilings
  • HVAC


Permanently Flexible Acoustical Sealants

  HSAC-100 HSAP-200
Description Acoustical Caulk Acoustical Putty
Fire Rating Class "A" per ASTM E-84 1 hour to ASTM E814
UL Rating UL 723 UL 1479
Size Gunnable 29 oz. tubes 7" x 7" x 1/8" thick sheets
Color White Blue/Green
Formulation Easily extruded latex bead 1 oz/in.3 putty
Non Hardening Yes Yes



  • Pliable seal against airborne sound, air infiltration and moisture
  • Adheres to wood, metal, concrete, gypsum board and other construction materials and building substrates
  • Maintains STC value (Sound Transmission Class) of sound rated walls, systems and assemblies
  • Non-hardening and non-migrating
  • Will not shrink, crack or dry out
  • Asbestos free and odorless
  • Fast, smooth, easy application and clean-up
  • Formulations for bead applications and moldable putty
  • UL tested and classified




  • Exposed and unexposed applications
  • Building structure perimeter joints
  • Metal/wood floor and ceiling runners
  • Around electrical boxes, outlets and switches in sound rated wall assemblies
  • To seal gaps around pipe, duct, conduit, utility lines and other penetrations of sound rated structures
  • Dual service acoustical and thermal insulation treatments
  • Sound rated doors and windows
  • Seams and joints in high performance pipe and duct insulation (external) systems
  • Any industrial, commercial or residential sound rated construction



Duct & Pipe Penetrations Through Walls


HUSH SEALANT™ is available in 29 oz. tubes to fit commercially available caulk guns.