STI Ready® Sleeve Firestop Pathway Kits

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


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.
  • Click for More Features
  • UL

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.

Part # Trade Size Sleeve Diameter Plate Diameter Maximum Opening Price
STI-FS100 1" 1.116" 2.163" 1.25"
Quick Ship
STI-FS400 4" 4.500" 5.5" 4.5"
Manufacturer Direct
  • 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

  • View Material Safety Data Sheet (PDF) PDF

    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


    Related Articles


    How-To Corner


    Request A Quote

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

    You can also call us toll free 1-833-3CABLEORG (1-833-322-2536)

    Questions & Answers


    How long is the sleeve?

    Asked by Anonymous user on 01.13 AM Tuesday, 11 April, 2017

    • - Hello, No matter the diameter of the kits, they are each 12" long.

      andrew b. on 03.19 PM Tuesday, 11 April, 2017

    According to STI system search there is no rated system going through a wood floor/ceiling assembly. Is there another product for that application, or is it possible for this to be approved for that use?

    Asked by Anonymous user on 11.16 AM Wednesday, 26 July, 2017

    • - Hello, There is no testing with Ready Sleeve in floor-ceiling assemblies. Our recommendation would be to use EZ Path.

      Anonymous user on 11.21 AM Friday, 28 July, 2017

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