SC-175 Draft & Acoustical Sound Sealant | GLT Products

SC-175 Draft & Acoustical Sound Sealant

OSI GreenSeries SC-175 Draft and Acoustical Sound Sealant is a non-flammable, latex-based sealant specifically designed to reduce sound transmissions and drafts in all types of wall systems where sound-rated assembly is required. GreenSeries SC-175 is paintable, remains flexible and adheres firmly to wood, metal studs, concrete, drywall and most other building materials, while achieving and maintaining the specific STC (Sound Transmission Class) values. Meet LEED® requirements.

OSI GreenSeries SC-175 Draft & Acoustical Sound Sealant was developed primarily for commercial construction utilizing light weight cavity walls and floor systems. This sealant can be used in office buildings, hotels, apartment complexes and other types of commercial and residential construction. Use it for exposed and unexposed applications at perimeter joints, floor and ceiling runners, cutouts in gypsum board, veneer plaster systems and other areas where a sound rated assembly is required. This sealant can also be applied or buttered around all electrical boxes and outlets, cold air returns, heating and air conditioning ducts and other equipment penetrating wall surfaces for increased acoustical performance. Works well for sealing sill and base plates in residential construction.


  • Ultra-low VOC formulation
  • Easy water clean-up
  • Reduces draft and sound transmission
  • Paintable and flexible
  • Maintains STC values


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