Intumescent Wrap Strip

Prevent The Spread of Fire Around Pipe Passages and Pass-Throughs

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What's special about these fire wraps?

  • Designed to stop the spread of fire through floors, ceilings and walls via pipes for safety and security
  • Fast-acting intumescent technology expands to over 24 X its original size to seal out smoke and flame
  • Saves money by using 50% less wrap than other brands
  • Click for More Features

Specified Technology Inc's wrap strips provide you with a foolproof solution for preventing flame and smoke spread in through-ways. These easy to install intumescent strips expand to 24 times their original size when exposed to temperatures over 250°F, to completely seal cavities in walls, ceilings, and floors.


STI-SSWRED Red Wrap Strip 1.5" W x 0.25" Thick x 12' L 3.03 lbs 1
STI-SSWRC2 Metal Restraining Collar 25' Long 3.76 lbs 1
STI-WSC-8RED Pre-Formed Restraining Collar for 6" Plastic Pipe 6" Diameter 1.06 lbs 1
STI-SSWFT Foil Tape 2" x 30' 0.44 lb 6
  • Easy to install- takes only minutes to secure your building against a spreading fire
  • Safe for plastics tested on PVC, ccPVC, ABS, ccABS, PP, FRPP, and PVDF
  • Water-resistant will not break down or lose qualities when exposed to moisture
  • Conforms easily to the pipes to make installation a snap
  • UL classified for plastic pipe applications up to and including 3 hours
  • ASTM E814 and UL1479



Color Red
Thickness 1/4” (6 mm)
Width 1-1/2” (38 mm)
Length 12’ (3.7 m)
Weight 1.10 lbs (0.52 kg)
Expansion System Two-Stage
Expansion Begins 250° F (121° C)
Volume Expansion 16 to 24x
In Service Temp Less than 130°F(54°C)
Storage Temp Less than 120°F (49°C)
Shelf Life No Limit
Oven Aging No Change (60°C)
Humidity Exposure No Change (60° C; 98% R.H.)
UL Accelerating Aging Pass





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.
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.
STI firestop pillow applicationSTI SpecSeal® Firestop Pillow
Able to expand in all directions when exposed to extreme heat, these easy to use intumescent pillows block the spread of smoke and flame through wall penetrations and construction gaps.
STI Mortar FirestopSpecified Technologies SpecSeal® Mortar Firestop
With a combination of heat sinking and insulating properties, this lightweight, low-density mortar dries quickly and requires little support, making retrofit jobs fast and easy.
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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