STI Firestop SpecSeal SSP Firestop Putty


  • Available in tubes or preformed pads
  • Remains pliable and workable for the lifetime of the installation
  • Acoustically tested
  • Will not harden overtime!

SKU: SSP100 Category: Tag:

SpecSeal SSP Firestop Putty excels at sealing cabling penetrations and outlet boxes. SSP Putty is non-hardening and easily hand works around grouped cabling penetrations forming a re-enterable seal allowing for future work. When applied with outlet boxes, SSP Putty easily works into voids and seams forming a continuous seal against fire and the products of combustion.

Physical Properties

Density1.45 kg/L (12.08 lb/gal)
Solids Content100%
Mold & Fungus Growth Rating (ASTM G21)1
Volume ExpansionGreater than 500% (free expansion)
Expansion Begins230°F (110°C)
In Service Temperature10°F (-23°C) to 120°F (49°C)
Installation TemperatureLess than 100°F (38°C)
Storage TemperatureLess than 100°F (38°C)
STC Rating (ASTM E 90-04/ASTM C919)62 (Relates to Specific Construction)
VOC0 g/L*
Shelf LifeNo Limit

*Per SCAQMD Rule 1168 (EPA Method 24)


STI Firestop


24" Stick, 36" Tube, 7.25" Square, 9" Square

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