Firestop, Smoke, and Sound Solutions for Mechanical Contractors

Formulated with the Contractor in Mind
SpecSeal® LCI Intumescent Sealant works into tight annular spaces between ducts and wall or floor assemblies as well as within AC Linesets. LCI Sealant's formulation makes it equally suited for wall, floor, and overhead application without slumping or sagging. Requiring minimal tooling and no special tools for application, LCI is the go to solution for maintaining fire, smoke, and sound protection for mechanical penetrations in fire-rated construction.
Eliminate Multi Step Inspections
FyreFlange® HVAC Firestop Angle eliminate the multi step inspection process of a traditional firestop sealant and reinforcing angle installation. FyreFlange® Angle is a powder-coated steel angle incorporating a factory applied intumescent gasket that resists the passage of smoke and flame while also reinforcing protected ductwork preventing ductwork from collapsing under fire exposure.


Solutions for Mixed Mechanical Penetrations
SpecSeal® SBR Firestop Blocks expand when exposed to high temperatures to resist the passage of fire, smoke, and hot gases. SBR Blocks easily compress and conform around any penetrant stacking in a brick-like manner. SBR Firestop Blocks may be used to seal new or existing mechanical penetrations range from small single penetrants conditions up to large openings with multiple penetrants making short work of complex penetration firestop conditions.
- Lightweight for ease of installation
- Easier wire screen requirements for large openings and 2 hour ratings
- May be cut to size
- No special tools required
- Superior air leakage ratings
- No cure time -> fast application
- Dust-free, fiber-free, halogen-free, and solvent-free
FyreFlange HVAC Firestop Angle Installation
FyreFlange Firestop Angle is a single step solution to addressing HVAC Ductwork penetrations. FyreFlange consists of a heavy steel angle with an intumescent gasket, sealing against fire and smoke while reinforcing ductwork under exposure. Eliminate the headaches of staging and multiple inspections of traditional HVAC firestopping with FyreFlange.
Watch More VideosEase of System Selection and Submittal Generation
Guided search for finding the right firestop system for your condition and building Firestop Submittals for submission to your AHJ.
- Find firestop systems on your phone, tablet, or the web
- Streamlined firestop system submittal package
- Integrate user documents, company logos, and Engineering Judgements
Firestop Penetration Design and Collaboration in Revit
Firestop Clash Management® (FCM) is our Autodesk® Revit® Plugin that takes the guess work out of firestop solution design and selection. Utilizing clash detection and model parameter data, FCM scans your model detecting locations where construction joints and penetrations occur and recommends appropriate firestop systems at these locations. Additionally, FCM places marker and product objects within the model ensuring that system selection are present within the model and accessible to project team members.
- Automates system selection and placement within the mode
- Functions at your workstation, no need to manually export to third party systems/services

Markets We Serve
Explore our diverse range of offerings tailored to cater to a wide spectrum of markets & industries.
Healthcare
We understand the challenges you face maintaining fire life safety compliance in the healthcare physical environment, and we can be your strategic partner in providing cost effective, sustainable solutions. STI offers a full catalog of tested solutions, as well as a dedicated team of Healthcare experts.
Learn more about our Healthcare SolutionsDate Center
The Data Center environment represents a unique challenge compared to other occupancy types. Beyond life safety, physical security, containment of conditioned air, and increased electrical and low voltage pathway infrastructure further complicate building design.
Learn more about our Data Center SolutionsGovernment
Protection and security for government facilities needs to be constantly maintained. STI partners with government agencies to help protect staff and critical infrastructure alike in disaster scenarios. EZ Path® not only protects lives and property, it’s maintenance-free design assures uninterrupted security.
Learn more about our Government SolutionsHigher Education
Fire life safety and acoustic protection are critical background elements of any successful educational intuitions. Providing robust and reliable protection for students and staff alike while creating a peaceful environment free of distractions for students to excel in.
Learn more about our Higher Education SolutionsFinance
Privacy, security, and safety are major priorities for financial institutions. EZ Path® not only protects lives and property, it’s maintenance-free design assures uninterrupted security. When it comes to protecting critical infrastructure, EZ Path is the only logical choice.
Learn more about our Finance Solutions
Tools & Resources
We’ve curated an extensive collection of tools and resources tailored to meet the specific needs of professionals in the industry. Our assortment focuses on functional tools and references for Firestop solutions, providing professionals with the knowledge, guidance, and tools necessary to ensure safety, compliance, and precision in their projects, ultimately enhancing the integrity of their construction work.
- Guided search for finding the right firestop system for your condition and building Firestop Submittals for submission to your AHJ
- Find firestop systems on your phone, tablet, or the web
- Streamlined firestop system submittal package
- Integrate user documents, company logos, and Engineering Judgements
Automatically find firestop systems from within AutoDesk® Revit®
Track fire life safety systems on your project via your tablet, phone, or web browser.
Find any and all LEED Credits associated with our firestop products in one place
See how EZ-Path is the best return on investment cable pathway solution on the market
Determine how many EZ-Path Fire-rated Pathways you need based on cable size and count
These powerful tools guarantee the right systems are selected for the fastest and most cost-effective installation for all your projects.
LCI Intumescent Firestop Sealant
SpecSeal LCI Sealant has excellent caulking properties making it easy to apply in vertical applications as well as overhead.
SBR Firestop Blocks
SpecSeal® Firestop Blocks are penetration firestop products resembling foam bricks.
FyreFlange HVAC Firestop Angle
FyreFlange Firestop Angle is a single step solution to addressing HVAC Ductwork penetrations.
SSB Firestop Pillows
SSB Firestop Pillows easily compress and conform around any penetrant. Equally suited for new or existing conditions, SpecSeal Pillows make short work of even the most complex through-penetration firestop conditions.