Firestop Devices


Designed to prevent the spread of fire and smoke through openings and pass-throughs in walls, ceilings and floors, firestop devices are necessary for many types of buildings and environments.

Applications for our firestop devices include data centers, health-care facilities, business and educational buildings. We also carry firestop devices that are appropriate for residential use.
Made by STI, a leader in fire-stopping technology for more than 25 years, these products include firestop sleeves and kits available in a variety of sizes to fit your needs for internal or external firestop sealing. The sleeve kits include hardware and putty, giving you everything you need for quick installs.

Discount Low Voltage carries a huge selection of firestop sleeves, plugs, collars, grommets and devices. That means you can find exactly the firestop device you need for your project, whether you are tackling a minor renovation or major new construction.

We also carry plugs of different sizes suitable for single and grouped cabling in common construction materials such as concrete or gypsum board. Re-installable plugs are easy to install and provide quick retrofits.
In addition, you’ll find grommets for penetration of one or two small cables as well as pathways and pathway kits that are easy to install and provide maximum cable protection with zero maintenance. Our collars are available for pipes of different sizes and provide affordable solutions, as do our wrap strips, available in rolls or pre-cut strips.
Check out our selection of other firestop supplies here.

These products let you take an economical approach to firestopping while providing added safety. Take advantage of free shipping for eligible orders. Orders shipped outside the state of California pay no sales tax.


You can find a tremendous amount of information on these products by watching Mercy’s short videos on the individual product pages. Downloadable spec sheets are also available there. Of course, our expert staff is here to answer any questions you have via email or phone.