STI Red Intumescent Wrap Strip

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Wrap strips from Specified Technology Inc are designed to provide protection and prevention in the spread of smoke and flames within through-ways. With an expansion of 24x they are able to seal cavities in floors, walls or ceilings completely.

Features and Benefits

•    Easy installation in a matter of minutes
•    Safe for most plastics including ABS, ccABS, PVC, ccPVC, PP, FRPP as well as PVDF
•    Moisture and water resistant: Doesn’t lose quality or break down when exposed to wet elements
•    Conforms with ease to piping making any installation quick and easy
•    A 3 hour rating under UL1479 and ASTM E814
•    Has been designed to prevent the spreading of fire through ceilings, walls and flooring through piping systems
•    When exposed to 250F it will expand to 24 times its normal size for an excellent seal
•    Money saver with the use of less wrap than other products – up to 50%

How would I install this product?

•    Clean area thoroughly so it is free from any substances such as dirt, oil and dust etc
•    Take wrap strip and encircle the penetrant
•    Secure the layers of wrap strip into place by using foil tape or steel wire when required
•    Slide the strip into position in the opening as per instructions by STI design or UL system
•    Take SpecSeal™ sealant and use when required for a proper smoke seal

Where would I use it?

•    Pipes
•    Plastic pipes
•    Within buildings and businesses with pipes running through them
•    Where there is a risk of fire spread through pipes


Specifications and Technical Notes


Part #





6 mm or ¼ inches


38 mm or 1-1/2 inches


3.7 m or 12’


0.52 kg or 1.10 lbs

(System) Expansion

Two Stage

(Begins) Expansion

160° C or 320° F

Expansion (Volume)

16 up to 24 times original size

(Temp) In Service

54°C or 130°F or less than

(Temp) Storage

49°C or 120°F or less than

Shelf Life


Oven Aging

60°C - No Change

Humidity Exposure

60° C; 98 percent R.H. - No Change

UL Accelerating Aging


 Safety Elements

•    Use according to the manufacturer’s instructions when installing
•    Make sure there are no holes between the wrap strip and the wall after installation
•    Store in a dry area
•    Inspect the areas and seals periodically for any gaps or cracks that may have occurred

Standards Endorsing this Product
•    UL1479
•    ASTM E814


Name of product: STI Instumescent Wrap Strip - Red Wrap Strip
Dimensions: 1.5" W x 0.25" Thick x 12' L  (38mm x 6mm x 3.7 m)
Weight: 3.03 lbs
Quantity: 1
Color: Red


Name of product: STI Instumescent Wrap Strip – Metal restraining collar
Description: 30 Gauge sheet metal restraining collar for ≤ 4" (102 mm) pipes (25' (7.6 m) roll.
Dimensions: 25' Long
Weight: 3.76 lbs
Color: Gray/silver
Quantity: 1


Name of product: STI-WSC-8RED STI Instumescent Wrap Strip – Pre-forming restraining collar for 6” (152 mm)plastic pipe
Dimensions: 6" Dia.
Weight: 1.06 lbs
Quantity: 1
Color: Silver/gray


Name of product: STI-SSWFT STI Instumescent Wrap Strip – Foil Tape
Dimensions: 2" x 30'
Weight: 0.44 lb
Quantity: 6
Color: Silver/gray

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