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STI SpecSeal SNS120W Smoke N Sound Acoustical 20oz Sausage
SpecSeal SNS120W Smoke N Sound is a white acrylic latex acoustical and smoke sealant in a 20 oz sausage for penetrations, membrane openings, and joints in smoke-rated walls. It tools into a flexible smoke and sound barrier on vertical and overhead work.
- Seals pipes, conduits, cabling, outlet boxes, and head-of-wall joints where smoke and sound matter.
- Stays flexible after dry so minimally dynamic joints can move without cracking the barrier.
- Keeps cable jackets safer with a water-based formula that has no solvents.
$7.76
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SpecSeal SNS120W Smoke N Sound - 20 Oz Sausage
SpecSeal SNS120W Smoke N Sound is a white acrylic latex acoustical and smoke sealant in a 20 oz sausage for through-penetrations, membrane openings, and linear joints in smoke-rated walls. The single grade caulks, knifes, or trowels onto vertical and overhead work, bonds to common construction materials, and dries to a flexible water-resistant smoke and sound barrier.
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Key Features
- SNS120W is the 20 oz sausage of white Smoke N Sound acrylic latex for smoke-rated penetrations and joints.
- Tools as a single grade that caulks, knifes, or trowels with high-build hold on vertical and overhead surfaces.
- Seals smoke and reduces sound transmission so partitions stay quieter and more smoke-tight after tool-off.
- Stays flexible when dry so wall-to-wall and head-of-wall joints that are static or minimally dynamic stay sealed.
- Keeps cable jackets safer because the water-based formula has no solvents that attack those jackets.
- Cleans up with water before dry and can be painted once the sealant has dried.
- Bonds to common construction and penetrant materials without asbestos, PCBs, or inorganic fibers.
Technical Specifications
| Property | Value |
|---|---|
| Catalog number | SNS120W |
| UPC | 730573111512 |
| Packaging | 20 oz sausage, 36 cu in (592 ml) |
| Color | White |
| Chemistry | Water-based acrylic latex smoke and acoustical sealant |
| STC rating | 62 (relates to specific construction) |
| Application temperature | 35°F to 100°F (2°C to 38°C) |
| In-service temperature | Less than 185°F (85°C) |
| VOC content | 20 g/L |
| Shelf life | 24 months from date of manufacture |
Product documents: SpecSeal Smoke N Sound Smoke and Acoustical Sealant Product Data Sheet
Frequently Asked Questions
Where does SpecSeal SNS120W belong on a smoke-rated wall?
SNS120W Smoke N Sound is an acrylic latex acoustical and smoke sealant for through-penetrations such as pipes, conduits, cabling, busways, and openings; membrane penetrations such as p-traps and outlet boxes; and linear joints such as wall-to-wall and head-of-wall work that is static or minimally dynamic. It is built for smoke control, noise control, and dust or infectious-control sealing in smoke-rated assemblies, not as an intumescent firestop sealant.
How do crews apply the 20 oz Smoke N Sound sausage?
The sealant is a single grade with excellent caulking and high-build properties on vertical or overhead surfaces. It may be caulked from a standard sausage load, bulk loaded, knifed, or troweled. Apply between 35 F and 100 F (2 C to 38 C). Wear site PPE and follow the Safety Data Sheet. Product contains water and is conductive until dry.
Which Smoke N Sound size sits next to the SNS120W sausage on Indcon?
The live sister on Indcon is the SpecSeal Smoke N Sound 5 gallon pail (Magento name/url SNS205; entity 85582). The sealant-family PDS (amfile 865) also lists SNS129W 29 oz tube and SNS105W 5 gallon sealant pail. Manager should confirm whether the live 5 gal SKU matches sealant SNS105W or spray SNS205 before treating chemistry as identical across both sizes.
Is Smoke N Sound an intumescent firestop, and when should a crew pick firestop instead?
Smoke N Sound is a smoke and acoustical acrylic latex sealant. It is tested for smoke sealing, acoustical performance, and Class A ASTM E84 finish behavior, and it provides less than one cfm air leakage under UL1479 and UL2079 smoke-seal tests named on the PDS. When the published design calls for an intumescent firestop sealant, collar, pillow, or putty, choose that firestop product instead of Smoke N Sound.
What temperature and storage window applies to SNS120W?
Application temperature is 35 F to 100 F (2 C to 38 C). In-service temperature is less than 185 F (85 C). Store unopened material at 40 F to 95 F (4 C to 35 C). Shelf life is 24 months from the date of manufacture. The dried sealant is paintable, auto-bonding, water resistant, and will not re-emulsify when dry. VOC content is 20 g/L; STC is 62 on a specific construction.
What safety limit applies while SpecSeal SNS120W is still wet?
The PDS states the product contains water and is conductive until dry. Do not apply in the presence of exposed or energized electrical conductors. After dry it is water resistant and will not re-emulsify. STI designed the formula to be safe with plastics and cable jackets, yet still asks crews to confirm any pipe- or cable-maker restrictions before install.
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