SpecSeal® SSS Intumescent Sealant is a latex-based, high solids firestop compound featuring STI’s patented and proprietary two-stage intumescent technology. Ready-to-use with a unique multi-viscosity formula, this single component sealant provides excellent caulking properties and high build capabilities on vertical or overhead surfaces, effectively sealing penetration openings against fire, smoke, hot gases, and water.
Key Features & Benefits
- Two-stage intumescent technology – extremely fast and directionalized expansion for superior protection
- Water-based formula – easy installation, cleanup, and disposal with minimal environmental impact
- Endothermic fillers – absorb heat and release water for enhanced fire protection
- High solids formula – minimal shrinkage with 79.2% solids content by weight
- Sandable and paintable – allows seamless finishing when dry
- Water-resistant – will not re-emulsify when dry for long-term durability
- Safe for plastic contact – contains no solvents that adversely affect plastic pipes or cable jackets
- Multi-viscosity grade – excellent caulking properties with high build capabilities
- Red color identification – easy identification and inspection compliance
- Non-halogenated formula – safe composition with no asbestos, PCBs, or inorganic fibers
- LEED™ v3 compliant – meets low emitting materials credit requirements
Applications & Penetration Types
Metallic Penetrations
- Large metallic pipes – tested for penetrants up to 36″ (914mm) trade size
- Steel, iron, copper pipes – comprehensive coverage for metal piping systems
- Copper tubing – plumbing and HVAC applications through all common constructions
Non-Metallic Penetrations
- PVC, CPVC, PVDF pipes – plastic piping systems and conduits
- PEX and PEX-AL-PEX – flexible tubing for water supply systems
- ABS and PB pipes – drainage and specialty piping applications
Multi-Service Penetrations
- Cable and cable trays – data, communications, and power cable systems
- Bus duct and HVAC ductwork – commercial building mechanical systems
- Insulated pipes – heating, cooling, and process piping with insulation
- AC line sets – refrigeration and air conditioning penetrations
- Service entrance – electrical, telephone, and TV service penetrations
- Wood floor applications – complete firestopping package for electrical, plumbing, HVAC, TV, and telephone
Technical Specifications & Performance
| Property |
Specification |
| Color |
Red |
| Density |
12.03 lb/gal (1.44 kg/L) |
| Solids Content (Weight) |
79.2% |
| Solids Content (Volume) |
70.2% |
| pH Level |
8.3 |
| VOC Content |
29.2 g/L |
| Flame Spread |
0 (ASTM E84/UL723) |
| Smoke Development |
0 (ASTM E84/UL723) |
| STC Rating |
62 (relates to specific construction) |
| Volume Expansion |
8x free expansion |
| Expansion Range |
230°F to <1,000°F (110°C to <538°C) |
| Two-Stage Expansion |
230°F (110°C) 1st stage, 350°F (177°C) 2nd stage |
| Service Temperature |
-10°F to 185°F (-23°C to 85°C) |
| Application Temperature |
35°F to 100°F (2°C to 38°C) |
| Storage Temperature |
40°F to 95°F (4°C to 35°C) |
| Shelf Life |
24 months from manufacture |
Installation Methods & Package Options
Application Methods
- Pumping – for large volume applications and continuous installations
- Caulking – standard cartridge or bulk loaded for precision application
- Knifing – manual application for detailed work and small areas
- Troweling – vertical and overhead surface applications
Available Package Sizes
| Size |
Volume |
Weight |
Case Qty |
Applications |
| SSS100 |
10.1 oz tube |
1.07 lbs |
12 pieces |
Small penetrations |
| SSS120 |
20 oz sausage |
1.86 lbs |
12 pieces |
Medium applications |
| SSS129 |
29 oz tube |
2.84 lbs |
12 pieces |
Larger penetrations |
| SSS102 |
2 gallon pail |
23.29 lbs |
Single |
Commercial projects |
| SSS105 |
5 gallon pail |
62.45 lbs |
Single |
Large installations |
Performance Standards & Certifications
Fire Resistance Testing
- UL Certified – tested to ASTM E814 (UL1479) standards
- FM Systems Approved – Factory Mutual approval for commercial applications
- CAN/ULC-S115 – Canadian fire test standards compliance
- ASTM E119 (UL263) – time-temperature requirements compliance
- Fire ratings – tested systems provide up to 4-hour fire resistance
- T Ratings capability – designed to match wall or floor assembly ratings
Environmental & Safety Compliance
- Mold and fungus resistance – 0 rating (ASTM G21)
- Storage stable – will not separate when stored properly
- Non-shrinking – maintains seal integrity when applied correctly
- Safe plastic contact – no adverse effects on plastic pipes or cable jackets
