SKU: STI-SSM106

STI SpecSeal Firestop Mortar – Fire Barrier Penetration Seal

Specified Technologies, Inc.

$141.39

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This Portland cement-based sealant is designed as a lightweight and cost-effective firestop solution for sealing applications. It provides resistance and protection against fire, supporting use in construction environments where fire-rated performance is required.

The sealant can be easily applied into concrete walls and floors, allowing for efficient installation. It cures quickly and is formulated to resist spalling or cracking due to freezing conditions or temperature changes, maintaining consistent performance over time.

Property	Value
Color Pale	Pale Red
Odor	No perceptible odor
Density Mixed (Wet)	53 to 80 lb/cu. ft = 7.1-10.7 lb/gal (0.85-1.28 kg/L)
Density (Dry Mortar)	24 to 26 lb/cu. ft = 3.21-3.4 lb/gal (0.38-1.42 kg/L)
Flame Spread	0*
Smoke Development	Less than 5*
Application Temperature	35°F (2°C) to 100°F (38°C)
In Service Temperature	-10°F (-23°C) to 200°F (93°C)
Storage Temperature	No Limit
Ratio of Water/Mortar	17.4/22 to 22/22
Yield (Per 22 lb.)	1,250 cu. in (20.5 L) to 1,400 cu. in (22.9 L)
Open Time	30 Minutes working time
Shelf Life	No Limit

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