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
  • ULMade 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
  • Click for More Features

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



Part # STI-SSC600
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.






STI RTC STI Intumescent Firestop RTC Collar
Designed to clamp securely around plastic pipes that penetrate through walls and floors, these intumescent collars expand upon exposure to fire to seal out smoke and flame, and prevent fire from traveling from room to room.

Firestop Sleeve KitsSTI Split Firestop Sleeve Kits
Ready™ Split Sleeves are designed with a split pathway and come with wall plates which allow them to be implemented around existing cable bundles.


firestop putty, SP100STI SpecSeal SSP Putty
An excellent product for retrofit jobs and cabling that call for a firestopping sealant. It is easy to apply and meets the highest quality standards. This 36 cubic inch bar is all you need for metallic conduits, telephone, data or electrical power cable penetrations as well as a variety of sleeved and non-sleeved applications.

Application of STI SpecSeal Triple S Intumescent Firestop SealantSTI SpecSeal® Intumescent Fire stop Sealant
This sealant is ideal for construction gaps and blank openings in walls or floors. Tested and approved for use with metallic penetrants up to 30", SSS can be safely combined with other SpecSeal products.

Do you have any question about this product?
Let our experts and customers resolve all your doubts

we will beat a competitor's quote by 5%

Did you know that we can give you a quote for most of our products, including shipping?

You can also call us toll free 866.222.0030

What can make this page better?

We do everything we can think of to provide you with the product specs, images and ordering info you need, but if we're missing something or still have room to improve, please let us know. Your comments, suggestions and questions are the best tools we have for serving you better!