STI Intumescent SSC Collar

Unmatched Performance for Protecting Plastic Pipes of All Types

We Guarantee to Have the Best Price

What's special about this firestop intumescent collar?

  • Expansion starts at 250°F (121°C) and continues up to 1000°F(538°C) to ensure fire and smoke do not travel through the pipes
  • Made of a heavy-gauge galvanized metal collar that houses a molded intumescent insert for highly directional expansion
  • Easy to connect, with a simple double hook and screw to fasten to the wall or floor
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ULMade in USA

The firestop SSC collar is used with many types of plastic piping in construction. Thanks to their water resistance, rapid expansion and economical pricing, these units affordably help prevent the spread of fire and smoke to other parts of the building.


STI-SSC600 Intumescent SSC Firestop Collar, for plastic pipe 6" 4.67 lbs

  • Rapid expansion means that burning penetrants will be choked off faster
  • Patented two-stage intumescent technology for extremely quick expansion
  • Long-term aging studies indicate no significant loss of physical or expansion properties after elevated temperature, humidity and immersion testing
  • Provides a minimum of 15X free expansion to completely cover small cracks and holes
  • Meets the exacting criteria of ASTM E814 (UL 1479)
  • Made in the U.S.A. USA



Size (diameter) 6 inches
Shell Construction 22 Gauge gal. Steel
Intumescent Insert Molded on piece
Expansion Begins 250°F(1st Stage)
  350°F (2nd Saage)
Volume Expansion 16 to 24x (free expansion)
In Service Temp. ≤130°F
Oven Aging No Change (60°C) *
Humidity Exposure No Change (60°C, 98% R.H.) *

* Evaluation of physical properties and total expansion.






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