OSI GreenSeries Draft & Acoustical Sound Sealant is a latex-based sealant specially designed to reduce sound transmissions and drafts in all types of wall systems where a sound-rated assembly is required. Its primary function is to achieve and maintain the specific STC (Sound Transmission Class) value of the system designed. This paintable sealant remains flexible and adheres firmly to wood, metal studs, concrete, gypsum board and most other common building materials.

This sealant can be used in office buildings, hotels, apartment complexes and other types of commercial and residential construction. Use it to seal 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.  OSI SC-175 is a more affordable alternative to Green Glue Noiseproofing Sealant.