STI Marine

What STI Marine does

Specified Technologies Inc., operating as STI Marine and STI Firestop, is a privately held US-based manufacturer founded in 1989 and headquartered in Somerville, New Jersey. The company develops and sells firestop systems — intumescent sealants, collars, wraps, fire-rated cable pathways, and protective wraps — designed to impede the spread of fire, smoke, and toxic gases through penetrations and joints in fire-rated walls, floors, and marine divisions. Its technology foundation is proprietary intumescent chemistry, including a differentiated two-stage intumescent formulation in SpecSeal SSS Sealant, supplemented by digital specification tools such as a Revit-based Firestop Clash Management plugin and a web-based System Search & Submittal Builder.

STI generates revenue primarily through one-time sales of firestop products via a two-tier channel — regional manufacturer representatives for specification-stage engagement and industrial/construction distributors for fulfillment — with secondary revenue from engineering support services. The portfolio is organized under brands SpecSeal, EZ Path, SpeedFlex, FyreFlange, and E-Wrap, addressing healthcare, data center, marine, curtain wall/facade, industrial, MEP contractor, and emerging mass timber and modular construction segments. The company markets globally through regional websites covering North America, Brazil, Mexico, Europe, the Middle East & South Asia, and South East Asia, supported by AIA, ICC, and BICSI continuing-education programs that drive specifier adoption.

The company's commercial differentiator is regulatory and testing depth: 106 individually UL Certified solutions for curtain wall and facade applications — described by the company as exceeding the combined testing of all other listed manufacturers — alongside ISO 9001 quality certification and marine type approvals. New product cadence in 2024 (EZ Path Series 84+, SpecSeal EXC Collar, Quick Clip expansion, SNS high-viscosity spray, and Insulated Metal Panel UL listings) targets the high-growth data center and modular construction verticals, indicating active portfolio expansion rather than reliance on legacy product cycles.

Name

STI Marine

Legal name

Specified Technologies Inc.

Website

https://stimarine.com

Company type

Private

Founded year

1989

Operating status

Operating

Headcount range

51–100 employees

Short description

STI Marine (Specified Technologies Inc.) is a US-based, privately held manufacturer of intumescent firestop products — sealants, collars, fire-rated cable pathways, and protective wraps — serving healthcare, data center, marine, curtain wall, and construction markets globally through representatives and distributors.

Ownership category

akta.pro rank

Product category

Firestop Systems and Fire Protection Products

SIC

Gaskets, Packg & Sealg Devices & Rubber & Plastics Hose (3050)

akta.pro primary industry

Firestop & Penetration Sealing Materials (IMADAGAL)

akta.pro secondary industries

Firestopping & Fire-Resistant Sealants (IMADAOAI), Firestopping, Seismic Bracing & HVAC Installation Accessories (IMADANAK), Insulation, Fire Protection & Acoustic Materials (IMAJAKAK)

Keywords

• Firestop systems
• Intumescent sealants
• Fire-rated pathways
• Perimeter fire barriers
• Construction joint protection

Headquarters

HQ city

Somerville

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Technology or R&D, Operations, Marketing or Sales, Infrastructure

Revenue model

1. Firestop Products: Sale of firestop products including caulks, sealants, putties, collars, wrap strips, fire-rated pathways, and accessories for construction and marine applications. Products are sold through distributors and representatives.
2. Engineering Services: Technical engineering support services for system selection, specification, and compliance verification. Available through support center.

Go-to-market motion2 records

Distribution channels2 records

Marketing channels6 records

Core offering

STI Marine designs, manufactures, and distributes a full line of firestop products — including intumescent caulks, sealants, putties, collars, wrap strips, cast-in devices, fire-rated cable pathways (EZ Path), curtain wall perimeter fire barrier systems, construction joint solutions, and marine-specific firestop devices — to seal penetrations and joints in fire-rated walls and floors. The company also provides engineering support services for firestop system selection, specification, and code compliance verification. Products are sold globally through regional representatives and authorized distributors.

Product overview

STI Marine (Specified Technologies Inc.) is a global leader in developing innovative firestop solutions for marine and building applications. The company's product portfolio is organized into four main categories: Penetrations (firestopping for cables, pipes, and ducts through fire-rated walls/floors), Curtain Wall/Facades (perimeter fire barrier systems), Construction Joints (interior joint solutions), and Smoke & Acoustical (pathway solutions). Core brands include EZ-Path (fire-rated and smoke/acoustic cable pathways, including marine-specific MDM150 transits), SpecSeal (caulks, sealants, collars, wraps, sprays, and intumescent products), SpeedFlex (high-movement joint solutions), FyreFlange (HVAC ductwork firestop), and E-Wrap (endothermic protective wraps). Marine-specific products include MFS Marine Firestop Sealant and MSS Snap-Seal Cable Plugs. The company also provides digital tools including System Search & Submittal Builder, FCM Firestop Clash Management for Autodesk Revit, Firestop Locator, LEED Credit Calculator, and Detail Sheet Generator. STI serves markets including marine, data centers, healthcare, industrial, curtain wall, interior finish, MEP, modular construction, wood frame, and mass timber construction.

Differentiator

Problem solved

Functional benefit

Brands

• SpecSeal: Product brand for contractors offering firestop solutions including sealants, caulks, collars, wraps, and intumescent products.
• EZ Path
• SpeedFlex
• FyreFlange
• E-Wrap
• EZ-Firestop Grommets

Products and services

• EZ-Path Fire-Rated Pathway Series Fire-rated pathway devices designed for high cable volume conditions through fire-rated walls and floors, eliminating the burden of ongoing maintenance. Includes Series 44+ and Series 84+ variants that remain always-compliant even when cables are added or removed.
• EZ-Path Series 44NEZ Smoke & Acoustical Pathway Smoke and acoustic cable pathway providing leakage and acoustical performance with tested cable capacities ranging from 0% up to 100% visual fill.
• EZ-Path Retrofit Device Device for instantly remediating overfilled cable pathway sleeves, stubs, and trays by restoring fire ratings without reducing cable fill or removing existing firestopping products.
• EZ-Path MDM150 Fire-rated Cable Transit Zero-maintenance marine fire-rated cable transit device designed to seal fire-rated divisions in non-watertight marine applications without mechanical sealing of openings.
• EZ-Firestop Grommet Product for sealing penetrations of individual and small bundles of cables through gypsum board walls.
• SpecSeal Caulks, Sealants & Putties Comprehensive line of intumescent sealants, caulks, and putties for firestopping penetrations in fire-rated walls and floors.
• SpecSeal Collars, Wrap Strip & Cast-In Devices Factory-manufactured firestop devices including intumescent collars, wrap strips, and cast-in devices sized to plastic pipes and various penetrant types.
• SpecSeal SSS Intumescent Firestop Sealant Two-stage intumescent technology sealant suitable for combustible or non-combustible penetrants in healthcare and other critical applications.
• SpecSeal EXC Intumescent Firestop Collar Largest factory-made firestop collar on the market for non-metallic pipes measuring 16" (406 mm) or 18" (457 mm) in diameter.
• SpecSeal LCC Intumescent Firestop Collar Factory-manufactured firestop collars sized to plastic pipes of up to 4 inches.
• SpecSeal Cast-in Firestop Device Sleeve, concrete form and firestop rolled into a single device for cast-in applications during construction.
• SpecSeal Smoke N Sound (SNS) Spray High-viscosity acrylic latex spray for joints or gaps in non-fire-rated walls and floors, optimized for high-build applications on vertical and overhead surfaces.
• SpecSeal Quick Clip Insulation Hangers System designed to accelerate installation of curtain wall insulation for perimeter fire barrier systems, with self-locking fasteners that eliminate impaling pins and stiffeners.
• SpecSeal AS200 Elastomeric Spray Latex-based elastomeric firestop spray for construction joints and perimeter fire barrier applications.
• SpecSeal Fast Tack Firestop Spray Weather and wash-out resistant firestop spray for perimeter fire barrier applications.
• SpecSeal EP Powershield Electrical Box Insert Product engineered to protect electrical boxes and maintain fire-resistance ratings of wall assemblies.
• SpeedFlex TTG Track Top Gasket Joint solution designed for high movement and high rate of application, eliminating waste while providing movement capability and speed of installation for gypsum board construction joints.
• FyreFlange HVAC Firestop Angle Single-step solution for HVAC ductwork penetrations consisting of a heavy steel angle with an intumescent gasket, sealing against fire and smoke while reinforcing ductwork under fire exposure.
• E-Wrap Endothermic Wrap Protective wrap designed for fire protection of critical circuits and infrastructure such as fire pumps, signaling equipment, elevators, alarms, process control equipment, ERCES, and fuel oil piping.
• SpecSeal Firestop Block Intumescent urethane foam blocks installed in openings by compressing and stacking in a brick-like fashion, expanding in high temperatures to impede fire, smoke, and gas passage.
• MFS Marine Firestop Sealant Advanced hybrid polymer sealant that cures in the presence of atmospheric moisture, designed for fire-rated divisions in marine applications.
• MSS Snap-Seal Cable Plug Split-design cable plug for installation around new or previously installed penetrants, designed for small cables and metallic/plastic tubes in marine environments.
• SpecSeal Closet Flange Gaskets Product for sealing toilet drain penetrations, designed to prevent interference with proper closet flange installation after firestopping.

Quantifiable outcome

• EZ Path Series 84+ provides 93% capacity increase based on 0.236 in OD Cat6 Cable
• +1 more outcomes

Segments10 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Two partnerships are on record, tiered core.

• AutodeskcoreTechnology or IntegrationIntegration of FCM (Firestop Clash Management) plugin for Autodesk Revit, enabling clash detection for firestop systems during design phase. This digital tool helps identify and resolve firestop conflicts in building information models.
• UL (Underwriters Laboratories)coreTechnology or IntegrationUL certification and testing of firestop systems. STI has 106 individually tested and UL Certified solutions - more testing than all other listed manufacturers combined at UL.

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Hilti: Hilti offers a comprehensive firestop product line (sealants, collars, wraps, sleeves) under its CFS family, targeting the same MEP, curtain wall, and penetration applications as STI. Both compete for specification through distributor networks and digital tools, with Hilti operating at significantly larger global scale.
• Tremco illbruck: Tremco illbruck produces firestop sealants, wraps, and passive fire protection products (including the Nullifire brand) for the same building envelope, penetration, and joint applications STI serves. It is a direct competitor in both new construction and refurbishment markets, with particular strength in Europe.
• Nullifire: Nullifire (part of the Tremco CPG group) specializes in intumescent firestop sealants, coatings, and fire-resistant systems for construction joints and penetrations—directly overlapping with STI's SpecSeal and EZ Path product families in building applications.
• RectorSeal: RectorSeal (a CSW Industrials company) markets firestop sealants, collars, and intumescent products under brands such as Metacaulk and Biostop. It is one of the most direct US competitors to SpecSeal and EZ Path in the contractor distribution channel.
• Trelleborg (marine sealing & transits): Trelleborg's engineered polymer business supplies marine sealing systems, cable transits, and fire-rated penetration solutions for shipbuilders and offshore operators. It competes directly with STI Marine in marine fire-rated divisions and cable transit applications.
• Roxtec: Roxtec is a global leader in modular cable and pipe transit systems with strong marine and offshore certifications. It directly competes with STI's MDM150 marine transit and MSS Snap-Seal products in shipbuilding and offshore applications, and increasingly in data center cable management.

Broad incumbents

• Promat (Etex Group): Promat produces passive fire protection boards, sprays, and penetration systems for commercial, industrial, and marine applications. It overlaps with STI's E-Wrap and SpecSeal product families and is particularly strong in European and Asia-Pacific markets.
• ICP Group (3M Fire Protection heritage): ICP Group acquired several fire protection brands historically associated with 3M, offering firestop sealants, sprays, and devices under multiple labels. As a broad building products platform, it competes with STI across penetration and joint applications at scale.
• BASF Master Builders Solutions: BASF Master Builders Solutions offers firestop mortars, sealants, and passive fire protection products as part of its broader construction chemicals portfolio. It competes with STI primarily on large commercial and infrastructure projects where specifiers prefer bundled chemical solutions.

Emerging players

• Fischer (fischer Group of Companies): Fischer offers firestop systems including sealants, collars, and boards primarily in European markets. As a smaller, more regional player, it competes with STI on comparable penetration and joint products but with narrower geographic reach and product depth.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/sti-firestop
• Xx.com/STI_Marine
• Facebookfacebook.com/STIMARINE

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about STI Marine