STI LC155 ENDOTHERMIC SEALANT 5GL
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STI LC155 sealant is a latex-based, high solids firestop compound
This material, when properly installed, will effectively seal penetration openings against the spread of fire, smoke, toxic gasses and water.
STI LC155 is engineered to adhere well to virtually all construction surfaces and may be applied using a standard caulk gun or by troweling with a standard mason’s trowel or with a putty knife.
STI LC155 dries without shrinking to form a flexible shield against the propagation of fire. Its premium latex binder system is totally resistant to water and will not re-emulsify after drying. STI LC155 is non-halogenated, contains no asbestos, inorganic fibers or solvents.
Features and Benefits
- Water-Based
- for easy installation, cleanup, and disposal.
- Endothermic Fillers to absorb heat & release water.
- High Solids Formula means no shrinkage!
- Paintable (when dry)
- Safe … No Solvents! Non-Halogenated! Low VOC’s
- Red Color for easy identification and inspection.
- Installer Friendly – Excellent caulking properties along with high build capabilities.
- Excellent Smoke Seal
Applications
- Piping: non-combustible steel, iron, cast iron and copper up to 24” in diameter.
- Complex multiple penetrants
- Communication cabling systems.
- Construction joints.
- HVAC ducts.
Physical Properties
| Color | Red |
| Odor | Mild Latex |
| Density | 11.4 lbs/gal (1.36 kg/L) |
| Solids Content by Weight | 80% |
| Solids Content by Volume | 74.3% |
| pH | 7.4 to 8.4 |
| In-Service Temperature | ≤185˚ F ( ≤ 85˚ C) |
| Storage Temperature | 40˚F (4˚C) – 95˚F (35˚C) |
| Flame Spread | 0* |
| Smoke Developed | 10* |
| Movement | +/- 12.5% or 25% in compression only**** |
| STC Rating | 61 (Relates to specific construction) (ASTM E 90-04/ASTM C919) |
| VOC Content (EPA Method 24/ASTM D3960) | 0.50 lb/gal (60 g/liter) |
| Shelf Life | 2 Years |
| *ASTM E84 (UL723) @ 14% Surface coverage. (Modified test for sealants and caulks.) | |
| ****500 Cycles per UL2079, AC30 (ICBO) and ASTM E1399 | |
