OSI® GreenSeries™ Draft & Acoustical Sound Sealant is a non-flammable, 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. The paintable sealant remains flexible and
adheres firmly to wood, metal studs, concrete, gypsum board and most other building materials. The
easy-to-use sealant cleans up easily with soap and water.
Developed primarily for commercial construction utilizing light weight cavity walls and floor
Used successfully in office buildings, hotels, apartment complexes and other types of
commercial and residential construction
Used 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.
Sealant can also be applied or buttered around all electrical boxes and outlets, cold air
returns, heating and air conditioning ducts and other utility equipment penetrating wall
surfaces for increased acoustical performance.
Works well for sealing sill and base plates in residential construction.
Not Recommended For::
Underwater applications or permanent water immersion
Applications requiring temperature resistance greater than 170°F (77°C)
Use on mirrors and metals that will corrode
Bonding two non-porous surfaces
Polyethylene, polypropylene, Nylon™ or Teflon™
Cement Board (Durock™)
For a 28 fl. Oz. (825 mL) cartridge: A ¼” (6 mm) bead extrudes approximately 86 ft. (26 m).
A 3/8” (9.5 mm) bead extrudes approximately 38 ft. (12 m).
Tools Typically Required:
Utility knife, caulking gun and tool to puncture inner seal of cartridge.
Preparation: The temperature of the product, the surfaces and the working area must be above 40°F (4°C). For best performance, apply sealant at 70°F
(21°C). Ensure surfaces to be sealed are clean, dry, structurally sound and free of dust, grease, oil, and other foreign contaminants. Cut off tip
of cartridge at a 45° angle to desired bead size (3/8” recommended). Puncture inside seal of cartridge.
General Construction Use:
Sealant should be applied as specified in the sound-rated system being installed (either wood or metal studs). Maximum joint size should not
exceed 5/8” (15.9 mm) x ½” (12.7 mm). If necessary, sealant can be painted as applicable to meet project requirements after 24 hours.
Bottom and Top Runners:
Apply a continuous 3/8” (9.5 mm) round bead of sealant on runners before setting gypsum board. Press gypsum board firmly into sealant,
ensuring complete contact with adjacent materials. Fill joint on top runners to complete the seal. Repeat procedure for double-layer
Cut-Outs and Perimeter Joints:
Backs of electrical boxes, pipes, duct systems and other types of utility equipment penetrating wall surfaces shall be buttered with sealant. Seal
all joints at perimeter edges including abutting surfaces and corner joints.
Clean tools and uncured adhesive residue immediately with warm water and soap. Cured adhesive may be carefully cut away with a sharpedged