STI SSS100 Intumescent Firestop Sealant (10oz Cartridge)


SpecSeal SSS Firestop Sealant is a premium grade water-based Intumescent firestop sealant. SpecSeal SSS Sealant incorporates our proprietary two-stage intumescent technology making it the go to choice for any combustible or non-combustible penetrants. As little as a 1/2″ applied depth of SSS Sealant is required to provide up to a 4 Hr Fire resistance rating when tested to ASTM E814/UL 1479.

  • Patented Two-Stage Intumescent Technology
  • Easily works into tight spaces between penetrants
  • Compatible with CPVC Piping
  • Can be sanded and painted to match its surroundings
  • Used in over 500 through-penetration UL® Tested Systems!


Physical Properties
Odor Mild Latex
Color Red
Density 9.4 lb/gal (1.13 kg/L)
Solids Content by Weight 80%
Solids Content by Volume 67.1%
pH 8.3
In Service Temperature -10°F (-23°C) to 185°F (85°C)
Storage Temperature 40°F (4°C) to 95°F (35°C)
Flame Spread 0*
Smoke Developed* 0*
STC Rating (ASTM E90/ASTM C919) 62
VOC Content (EPA Method 24/ASTM D3960) 0.24 lbs/gal (29.2 g/L)
Shelf Life 2 yrs
Expansion Begins 230°F (110°C) 1st Stage
350°F (177°C) 2nd Stage
Expansion Range 230°F to > 1,000°F (110°C to > 538°C)
Volume Expansion > 500% Free Expansion
* Tested to ASTM E84 (UL723) at 14% surface coverage (modified test for sealants and caulks)
Weight 1 lbs
Dimensions 2 × 2 × 10 in

SKU: SSS100 Category: Tags: , , , Barcode: 730573011003.
Weight 1 lbs
Dimensions 2 × 2 × 10 in