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STI SpecSeal LCI320 Fire Barrier LCI Intumescent Sealant 20oz Sausage
SpecSeal LCI320 is a red one-part intumescent latex firestop sealant in a 20 oz sausage for penetrations and construction joints. It stays in place on vertical and overhead work so crews can close metallic pipe, plastic conduit, and cable openings.
- Seals metallic pipe, plastic conduit, cable, and joints in rated walls and floors.
- Stays on vertical and overhead openings so crews can tool a smoke-tight fill.
- Keeps plastic pipe and cable jackets safer with a water-based latex that has no solvents.
$21.64
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SpecSeal LCI320 Intumescent Sealant - 20 Oz Sausage
SpecSeal LCI320 is a one-part intumescent latex firestop sealant in a 20 oz sausage for penetrations and construction joints. The red water-based sealant stays on vertical and overhead work, bonds to common construction and penetrant materials, and tools into a smoke-tight fill on metallic pipe, plastic conduit, cable, and joints in concrete, masonry, gypsum, and wood-frame assemblies.
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Key Features
- LCI320 is the 20 oz sausage of red intumescent latex for penetrations and construction joints.
- Stays on vertical and overhead surfaces with high-build latex so the fill does not slump.
- Keeps plastic pipe and cable jackets safer because the formula has no solvents that attack those jackets.
- Seals smoke as well as fire so the opening stays a smoke barrier after tool-off.
- Stays water resistant after dry and will not re-emulsify if the assembly later gets damp.
- Cleans up with water as a water-based red latex and can be painted when dry.
- Works with SpecSeal collars and wrap strips on larger plastic pipe when the published design calls for that pairing.
Technical Specifications
| Property | Value |
|---|---|
| Catalog number | LCI320 |
| UPC | 730573011720 |
| Packaging | 20 oz sausage, 36 cu in (592 ml) |
| Color | Red |
| Chemistry | Water-based intumescent latex |
| Volume expansion | 10x free expansion |
| Expansion begins | 350°F (177°C) |
| Application temperature | 35°F to 100°F (2°C to 38°C) |
| In-service temperature | Less than or equal to 185°F (85°C) |
| Shelf life | 24 months from date of manufacture |
Product documents: SpecSeal LCI Intumescent Sealant Product Data Sheet
Frequently Asked Questions
Where does SpecSeal LCI320 belong on a firestop job?
SpecSeal LCI320 Intumescent Sealant is the 20 oz sausage of the same red intumescent latex used on penetrations and construction joints. Typical work includes metallic pipe and EMT, copper, plastic conduit and PEX, insulated HVAC pipe, cable trays and busways, low-voltage cabling, and metal duct, plus joints in concrete, masonry, gypsum, and wood-frame barriers. The PDS also notes use with SpecSeal collars and wrap strips on larger plastic pipe when the design requires that pairing.
When should a crew pick the 20 oz LCI sausage instead of the cartridge?
Choose SpecSeal LCI320 for longer firestop runs that finish faster from a 20 oz sausage (592 ml) than from 10.1 oz tubes. The live sister cartridge is SpecSeal LCI300. A 5 gallon pail (LCI305) and a 29 oz tube (LCI329) appear on the LCI PDS and are not currently live on Indcon. Chemistry matches the 10.1 oz cartridge.
What construction types can this 20 oz LCI sausage firestop?
LCI provides up to a 4-hour fire rating for typical service penetrations through concrete or wood floors, concrete or masonry walls, and gypsum board walls, per the PDS. It is tested to ASTM E814 (UL1479), ASTM E1966 (UL2079), CAN/ULC-S115, and the time-temperature curve of ASTM E119 (UL263). Class A flame spread and smoke development are 0 / 0 when tested to ASTM E84 (UL723) at 14 percent surface coverage. Follow the published design for the assembly.
Which plastics and metals does the LCI sausage seal?
Metallic penetrants include steel, iron, copper pipe, copper tubing, steel conduit, and EMT up to 36 in trade size. Non-metallic conduits and tubing include PVC, CPVC, ABS, and PEX. The formula contains no solvents that might adversely affect plastic pipes or cable jackets, and the PDS marks FBC System Compatible with FlowGuard Gold, BlazeMaster, and Corzan piping. Still confirm any pipe-maker restrictions before install.
What movement does the LCI PDS publish for the cured sealant?
The Indcon amfile PDS (ZSFOD5062 25171) publishes movement capacity of +/-12.5 for the material (ASTM E1399) and 33 percent compression, Class II, for the system (UL2079). Average volume shrinkage is 21.1 percent (ASTM C1241). STC is 62 on a specific construction (ASTM E90-04 / ASTM C919). VOC content is 26 g/L per SCAQMD Rule 1168 (EPA Method 24).
How should unused LCI320 be stored, and how long does it keep?
Store between 40 F and 95 F (4 C to 35 C). Shelf life is 24 months from the date of manufacture when stored per the manufacturer. The sealant is storage stable and will not separate or shrink when dried if applied per the recommendations. No maintenance is normally required; inspect rated barriers periodically and reseal damage with SpecSeal products per the original approved design.
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