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SpecSeal SIL300 Silicone Sealant is a high performance silicone firestop sealant tested to resist the passage of smoke, flame and water through construction joints and through-penetrations. SIL300 Sealant cures to form a flexible seal and carries a Class 1 W Rating for water resistance (Per ANSI/UL1479).
Physical Properties
As Supplied
| Property | SIL300SL (Self-Leveling) |
|---|---|
| Consistency | Pourable |
| Density/(Weight per Gallon) | 11.5 lbs/gal |
| Coverage | For more information on product coverage see the following documents for Linear Joint & Penetration |
| Viscosity | 25,000 cps |
| Storage Temperature | Less than 80°F (27°C) |
| Application Temperature | 35°F (-37°C) to 140°F (60°C) |
| VOC Content | Less than 47 g/L* |
| Shelf Life From Date of Manufacture | 18 months |
| Tooling Time | 25 to 30 minutes |
| Tack Free, ASTM C679 (77°F, 50%RH) | 50 to 60 minutes |
| Sag/Slump, ASTM D2202 | N/A |
| Storage Warranty Period | 12 months from date of shipment if stored in original unopened container at 80°F (27°C) |
Cured
| Property | SIL300SL (Self-Leveling) |
|---|---|
| Color | Gray |
| Flame Spread | 5** |
| Smoke Developed | 45** |
| Mold & Fungus Growth Rating (ASTM G21) | 1 |
| Movement Capabilities | ± 50% (ASTM C719), ± 15% (ASTM E1399) |
| In Service Temperature | -35°F (-37°C) to 300°F (149°C) |
| Shore A Hardness (ASTM D2240) | 26 |
| STC Rating (Relates to Specific Construction), (ASTM E 90-04/ASTM C919) | 61 |
| Weathering & U.V. Resistance | Excellent |
| Tensile Strength, psi (ASTM D412) | 110 psi (0.76 MPa) |
| Elongation % (ASTM D412) | 600% |
| Tensile at 100% Elongation (ASTM D412) | 60 psi (0.41 MPa) |
| Peel Strength (21 day cure @ 77ºF/50 RH), ASTM C794 | 12 pli |
*Per SCAQMD Rule 1168 (EPA Method 24)
**Tested to ASTM E84 (UL723) at 14% surface coverage (modified test for sealants and caulks)
