STI Firestop SpecSeal Series SNS Smoke ‘N’ Sound Acoustical Sealant White


  • Economical – high performance without the high price
  • Water resistant – will not re-emulsify when dry
  • Water-based – easy installation, cleanup, and disposal
  • Remains flexible – allows movement
  • Acoustically tested, reduces noise transmission
  • UL® GreenGuard Gold Certified

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SpecSeal Smoke ‘N’ Sound Sealant is a high quality acrylic latex sealant designed for sealing through-penetrations (such as pipes, conduits, cabling, busways, openings), membrane penetrations (such as p-traps and outlet boxes) in smoke rated walls. SpecSeal Smoke ‘N’ Sound may also be used in linear applications such as wall-to-wall and head-of-wall joints where joints are designed to be either static or minimally dynamic. SpecSeal Smoke ‘N’ Sound Sealant is available in a single grade that has excellent caulking properties as well as high build properties on vertical or overhead surfaces. This single grade may be caulked (standard cartridge or bulk loaded), knifed or troweled. In addition, SpecSeal Smoke ‘N’ Sound contains no PCB’s nor asbestos.

Physical Properties

Density/Weight per Gallon13.6 lb/gal (1.63 kg/L)
Solids Content by Weight81.8%
Solids Content by Volume70.1%
Flame Spread5**
Smoke Development0**
Mold & Fungus Growth Rating (ASTM G21)0
CoverageFor more information on product coverage see the following documents for Linear Joint & Penetration
pH7.0 to 7.5
In Service TemperatureLess than 185°F (85°C)
Storage Temperature40°F (4°C) to 95°F (35°C)
Applicaton Temperature35°F (2°C) to 100°F (38°C)
STC Rating (ASTM E90-04/ASTM C919)62 (Relates to Specific Construction)
VOC Content20 g/L****
Average Volume Shrinkage (ASTM C1241)30.9%
Shelf Life From Date of Manufacture24 months
ASTM C834Complies
ASTM D217260 77°F

*Tested to ASTM E84 (UL723) at 14% surface coverage (modified test for sealants and caulks)

**Per SCAQMD Rule 1168 (EPA Method 24)


STI Firestop


20 oz. Sausage, 29 oz. Tube, 5 Gallon Pail

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