STI Firestop SmokeBlock 136 Caulk

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10.1 Oz. Tube – 18.2 cu. in. (300 ml)

  • Water-Based for Easy Clean-up
  • No Shaking or Mixing Required
  • Adheres to Wood and Masonry
  • Meets ASTM E136

SKU: SB100 Category: Tag:

SMOKEBLOCK Caulk is a non-combustible gun grade sealer for fireblocking and draftstopping in wood frame walls and floors. SMOKEBLOCK is designed for filling annular spaces around penetrants and along seams throughout the building envelope and is suitable for use in one or two family dwellings. Not Suitable for Use in Fire-Rated Construction.

Physical Properties

ColorLight Red
Density/Weight per Gallon14.3 lb/gal (1.71 kg/L)
Solids Content by Weight63.6%
Solids Content by Volume38%
Flame SpreadNon-Combustible ASTM E136**
Smoke DevelopmentNon-Combustible ASTM E136**
pH10.5 to 11.5
In Service Temperature0°F (-18°C) to 300°F (149°C)
Storage Temperature35°F (1.7°C) to 95°F (35°C)
Application Temperature35°F (1.7°C) to 95°F (35°C)
STC ratingN/A
VOC ContentLess than 2 g/L****
Shelf Life From Date of Manufacture12 months
Physical StatePaste
Evaporation RateGreater than 1.0 (BuAc=1)

*Tested to ASTM E84 (UL723) at 14% surface coverage (modified test for sealants and caulks)

**Per SCAQMD Rule 1168 (EPA Method 24)


STI Firestop

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