Intumescent Firestop Collars

Perfect Choice For Firestopping A Variety Of Plastics

STI LCC Intumescent Collar

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STI LCC Intumescent Firestop Collars

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  • STI Series LCC Collars - icon
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Low Price GuaranteeWhat's special about these LCC collars?

  • Easy installation: just line-up the tabs, and you will have a perfect fit every time
  • Expands up to 60X when exposed to 320°F (160°C), to seal our harmful smoke and fire
  • Ul logoThe compact design allows you to fit it in tight spots for added security
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Using the LCC collar from STI will keep flames and smoke from traveling through pipes to other floors, rooms or ceilings. The intumescent technology will seal even the smallest crack, keeping your building safe and secure.

  • Protects a wide range of plastic pipes: PVC, PVC foam core (ccPVC), CPVC, ABS, and ABS foam core (ccABS) - great for any new or existing construction
  • The intumescent material has no water-soluble or hygroscopic ingredients, so it can be used on water pipes
  • Can be used with most common forms of masonry construction for versatility
  • Intumescent ingredients are securely fastened inside a molded flexible rubber matrix for safety
  • ASTM E814 (UL1479)



Part # STI-LCC150 STI-LCC200 STI-LCC300 STI-LCC400
Expansion Begins 320°F (160°C)
Volume Expansion 32 to 64X
In Service Temp ≤120°F (49°C)
Shelf Life No Limit
STI-LCC150 1.5" (3.8cm) Galvanized Steel 0.22 lb
STI-LCC200 2.0" (5.1cm) Galvanized Steel 0.25 lb
STI-LCC300 3.0" (7.6cm) Galvanized Steel 0.49 lb
STI-LCC400 4.0" (10.2cm) Galvanized Steel 0.73 lb

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.


sti firestop ssc collarSTI Intumescent SSC Collar
Shown to withstand humidity, temperature and immersion tests without significant loss of protective properties, these fitted intumescent pipe collars expand to seal through-wall pipe penetrations against flame and smoke.


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