Specified Technologies Series SSS Intumescent Sealant 5 gal. Pail 1,155 Cu. In. (19.0 Liters)

Reference#: 73461
Item#: SSS105


STI Firestop SSS Sealant - The original multi-purpose firestopping solution

How do you choose the right firestopping sealant? When the measuring stick is product performance, versatility, ease of application, and shear breadth of tested systems, SpecSeal® Series SSS Intumescent Firestop Sealant has been and remains the reigning champion of industrial-strength firestopping sealants!

Unmatched Performance: Triple S reacts to heat using our patented and proprietary two-stage intumescent technology to expand rapidly to close off the path of smoke and hot gasses ahead of the advancing fire. Using active ingredients that are insoluble in water assures performance that is unaffected by humidity or moisture.

Triple S adheres to all common construction surfaces and dries to form a tough yet flexible water-resistant seal that can be sanded and painted to match its surroundings if so desired. As little as 1/2″ is required to provide up to a 4 hour rating when tested to the rigorous requirements of UL 1479 (ASTM E 814).

Unmatched Versatility: Whether your applications are plumbing and mechanical or electrical and datacom, utilizing combustible or noncombustible penetrants… Triple S can do the job!

Tested & Proven: With over 200 powerful Classified Systems, Triple S can handle virtually anything that job site conditions can dish out.


  • Unmatched Versatility… Over 200 tested and UL Classified systems!
  • Water-Based for easy installation, cleanup, and disposal
  • Two Stage Intumescence features extremely fast and directionalized expansion
  • Remains Flexible allows normal pipe movement
  • Sandable & Paintable (when dry)
  • Water-Resistant Will not re-emulsify when dry!
  • Safe for contact with plastics
  • Red Color for easy identification and inspection
  • Excellent Smoke Seal

    Common Applications:
  • Metallic pipes including steel, iron, or copper pipe and tubing
  • Nonmetallic pipes, conduits and tubing including PVC, CPVC, PVDF, PEX, PEX-AL-PEX, ABS and PB
  • Cable, cable trays and bus duct
  • HVAC Ductwork
  • Insulated Pipes
  • Multi-service penetrations including AC line sets, electrical, telephone, or TV service entrance and interior penetrations
  • Complete wood floor firestopping package for electrical, plumbing, HVAC, TV and telephone
  • Specification


    Mild Latex
    Density9.4 lb/gal (1.13 kg/L)
    Solids Content by Weight80%
    Solids Content by Volume67.1%
    In Service Temperature-10°F (-23˚C) – 185°F (85˚C)
    Storage Temperature40°F (4˚C) – 95°F (35˚C)
    Flame Spread0*
    Smoke Developed*10*
    STC Rating (ASTM E90/ASTM C919)62
    VOC Content
    (EPA Method 24/ASTM D3960)
    0.18 lbs/gal (22.0 g/L)
    Shelf Life2 yrs
    Expansion Begins230°F (110°C) 1st Stage
    350°F (177°C) 2nd Stage
    Expansion Range230°F to > 1,000°F (110°C to > 538°C)
    Volume Expansion> 500% Free Expansion