STI Ready® Sleeve Firestop Pathway Kits

A Complete Fire Stopping Kit For New And Existing Through-Wall Cable Penetrations

We Guarantee to Have the Best Price

What's special about these firestop kits?

  • The putty perfectly seals out superheated gases and dust, and minimizes the transmission of noise, fire and smoke
  • Kits come complete with sleeve, escutcheon plates, gaskets and putty for an economical fire -stopping solution
  • The 2" and 4" sizes include a rolled safety lip to eliminate sharp edges and prevent cable jackets from being accidentally stripped
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With STI's Ready® Sleeve Kits, there is no need to buy many different costly items to maintain the firestop in your wall or ceiling. Just choose from 1, 2, or 4" diameter sleeves, and the putty, firestop gaskets, mounting escutcheons and wall labels are all included.


STI-FS100 1" 1.116" 2.163" 1.25"
STI-FS200 2" 2.375" 3.375" 2.5"
STI-FS400 4" 4.500" 5.5" 4.5"
STI-FS201 2" 2.375" 4.5" 2.5"
STI-FS401 4" 4.5" 8" 4.5"
  • Enough putty is provided to seal the ends 1" deep for extra fire and smoke protection
  • The Ready® sleeves are great to use in concrete floors, walls, block walls, and gypsum board - perfect for most types of construction
  • Larger sizes of the Ready Sleeve include a built-in bushing that protects the cable jacket and allows for easy cable pulling
  • Putty doesn't harden, so it's a snap to add or subtract cables - just make your changes, and reapply putty to original depth
  • Standard-sized sleeves are perfect for gypsum board into which round holes can be easily drilled; larger sleeves are available for installation in masonry where drills could cause blowouts
  • UL tested and classified in accordance with ASTM E-814, UL 1479



Available Sizes 1" (25mm), 2" (51mm), and 4" (102mm)
Sleeve and Plate Construction 0.059" (1.5mm) thick steel (zinc plated)
Intumescent Gasket
Expansion Temp 350°F (177°C)
Volume Expansion 15x (free expansion)
In-Service Temp 130°F (54.4°C)
Putty Fill Material
Color Red
Odor None
Solids 100%
Expansion Temp 230°F (110°C)
Volume Expansion 8x (free expansion)
In-Service Temp 130°F (54.4°C)
VOC Content N/A
Shelf Life No Limit






firestop sleeveSTI 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. These sleeves weigh half of what competing threaded products do, and have fewer parts, which make them the product you need when you are working on ladders or in cramped spaces in rated and non-rated construction zones.

Cable Transit, FirestopAbesco CT120 Cable Transit
The Abesco CT120 Cable Transit is a Through Penetration Firestop Device designed to allow cables to penetrate fire-rated floors and walls.


STI Composite SheetSTI Firestop SpecSeal® Composite Sheets
Specifically created to firestop large and medium-sized openings, this intumescent composite sheet is easy to cut with sheet metal cutting tools, and provides 2 hours of fire protection.

STI Series FP Intumescent Firestop PlugsSTI Series FP Intumescent Firestop Plugs
Ideal for sealing cable penetrations, conduit and blank openings against the spread of fire and smoke, these intumescent plugs expand to 10 times their original size when exposed to high heat and flame.

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