Glass-Steel

What Glass-Steel does

Glass-Steel, Inc. is a privately held industrial fabricator founded in January 1979 in Conroe, Texas, specializing in fiberglass reinforced plastic (FRP) structures for municipal and industrial water/wastewater treatment, chemical processing, petrochemical, offshore oil and gas, pulp and paper, and oil production applications. The company designs and builds custom composite products — including effluent troughs, baffle walls, Stamford baffles, walkable launder covers, tank and channel covers, weir plates, scum baffles, stop logs/gates/plates, walkway/handrail systems, ladders, cabletray, platforms, clarifier bridges, trash racks, Parshall Flumes, and EXTREN pultruded structural shapes — using proprietary sandwich panel construction (glass-fiber skins with polymer concrete core) and isophthalic polyester or vinyl ester resin systems. Core technical differentiators include 50-foot clear-span capability without intermediate supports, a 25-year no-corrosion warranty on stop logs, NSF 61 compliance for potable applications, and compliance with OSHA, NEMA FG1, and AWWA F101-07 standards.

The company operates a sales-led, project-based custom fabrication model: products are quote-priced and manufactured to customer specifications rather than sold as standardized SKUs, with no e-commerce or self-serve channel. Revenue is generated through one-time project orders targeting engineering and procurement departments at municipal utilities (e.g., Laredo, Parkersburg, Ontario, Fort Kamehameha) and industrial enterprises (e.g., Dow Chemical, Saudi Arabia petrochemical project). The distribution model is direct sales from a single Texas headquarters, with affiliated sister company Spagco, Inc. producing complementary Parshall Flumes. Glass-Steel has been continuously operating for over 45 years, holds a registered Glass-Steel® trademark, and has not raised external funding, undergone M&A, or pursued public listing.

Name

Glass-Steel

Legal name

Glass-Steel, Inc.

Website

https://glasssteelinc.com

Company type

Private

Founded year

1979

Operating status

Operating

Headcount range

11–50 employees

Short description

Glass-Steel, Inc., founded 1979 in Conroe, Texas, is a privately held industrial fabricator of custom fiberglass reinforced plastic (FRP) structures — including troughs, baffles, covers, stop logs, walkways, and platforms — serving municipal water/wastewater treatment plants, chemical, petrochemical, and offshore industrial customers.

Ownership category

akta.pro rank

Product category

Industrial Fiberglass Fabrication

NAICS

Plastics Product Manufacturing (3261)

SIC

Miscellaneous Plastics Products (3080)

akta.pro primary industry

FRP/GRP & Composite Materials (Resins, Fibers, Core Materials) (IMAJAKAC)

Keywords

• Fiberglass fabrication
• FRP structures
• Composite materials manufacturing
• Water treatment equipment
• Industrial fiberglass products

Headquarters

HQ city

Conroe

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Custom Fiberglass Structure Fabrication: Project-based custom fabrication of fiberglass reinforced plastic structures for industrial and municipal applications. Products include troughs, baffles, covers, stop logs/gates/plates, flumes, and complete structural systems. Revenue generated through one-time project orders and custom specifications rather than standardized product sales.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

Glass-Steel, Inc. is a custom manufacturer and fabricator of fiberglass reinforced plastic (FRP) structures and components. The company designs and builds sandwich-panel FRP structures with polymer concrete cores and pultruded EXTREN fiberglass shapes, delivering single-piece fabrications up to 50 feet long, and supplies a wide catalog of standalone FRP products (troughs, baffles, stop logs/gates/plates, covers, walkways, ladders, grating, Parshall flumes, FRP buildings/enclosures, and structural shapes) to water/wastewater, chemical, petrochemical, and offshore oil & gas customers, backed by a 25-year warranty.

Product overview

Glass-Steel, Inc. is a manufacturer of fiberglass reinforced plastic (FRP) structures with stainless steel hardware, serving industrial and municipal water/wastewater treatment plants since 1979. The company offers a comprehensive portfolio of standard and custom fiberglass products including Fiberglass Composite Troughs, Baffle Wall Systems, Stamford Baffles, Walkable Launder Covers, Tank and Channel Covers, Weir Plates, Scum Baffles & Brackets, Stop Logs, Stop Gates, Stop Plates, Walkway & Handrail Systems, Ladders & Ladder Cages, Cabletray, Platforms, Clarifier Bridges, Trash Racks, Parshall Flumes, and EXTREN Fiberglass Structural Shapes. The product line also includes offshore structures, buildings, and enclosures. Products utilize pultruded fiberglass, sheet molded components, and composite construction with polymer concrete cores for superior structural properties.

Differentiator

Problem solved

Functional benefit

Brands

• Spagco: Spagco, Inc. is a sister company to Glass-Steel, Inc., producing Parshall Flumes constructed from fiberglass composite with polymer concrete core.

Products and services

• Fiberglass Composite Troughs Custom-fabricated fiberglass reinforced plastic troughs used in water and wastewater treatment process flows. Designed for corrosive service where metal troughs would degrade.
• Baffle Wall Systems Custom FRP baffle walls including Stamford, Scroll, and Standard Sloped configurations for water and wastewater treatment basins. Used to direct flow, control residence time, and improve treatment efficiency.
• Stamford Baffles Stamford-style FRP baffles for water/wastewater treatment applications, used to optimize flow distribution and treatment performance in clarifiers and contact basins.
• Walkable Launder Covers Load-bearing, walkable fiberglass covers for launder troughs in water treatment plants, providing operator access while containing odors, vapors, and weather exposure.
• Tank & Channel Covers Custom FRP covers for process tanks and channels in water/wastewater and industrial treatment facilities, used to control vapor emissions, debris ingress, and operator safety.
• Weir Plates FRP weir plates for flow measurement and level control in clarifiers and treatment basins, providing corrosion-resistant overflow surfaces in place of metal weirs.
• Scum Baffles & Brackets FRP scum baffles and mounting brackets used at the surface of clarifiers and sedimentation basins to retain floating scum and debris for removal.
• Stop Logs FRP stop logs used to isolate sections of channels, weirs, and tanks in water and wastewater treatment plants for maintenance or flow control, replacing heavier metal stop logs.
• Stop Gates FRP stop gates for isolating flow in channels and conduits at treatment plants, providing corrosion-resistant alternatives to metal slide gates.
• Stop Plates FRP stop plates used to seal or block flow in channels, weirs, and tank outlets in treatment facilities for maintenance and operational isolation.
• Walkway & Handrail Systems FRP walkway and handrail systems for water, chemical, and industrial facilities, providing corrosion-resistant, non-sparking access routes around process equipment.
• Ladders & Ladder Cages FRP ladders with safety cages for vertical access in chemical, petrochemical, and offshore facilities where metal ladders would corrode or pose spark risk.
• Fiberglass Cabletray FRP cable tray systems for routing electrical and instrumentation cabling in corrosive chemical, petrochemical, and offshore environments where metal tray would degrade.
• Platforms & Walkway Systems Custom FRP platforms and walkways for offshore, chemical, and industrial facilities, providing corrosion-resistant elevated access around equipment and process areas.
• Clarifier Bridges FRP clarifier bridges spanning circular clarifier tanks in water and wastewater treatment plants, providing a corrosion-resistant structural deck for drive mechanisms and operator access.
• Fiberglass Grating Molded or pultruded FRP grating panels used as flooring, trench covers, and platform decking in water, chemical, and industrial facilities where slip resistance and corrosion resistance are required.
• EXTREN Fiberglass Structural Shapes Pultruded EXTREN-brand fiberglass structural shapes (angles, channels, beams, etc.) supplied as raw structural members for use in chemical, water, and industrial fabrications.
• Parshall Flumes FRP Parshall flumes supplied in partnership with Spagco, used for flow measurement in open-channel water and wastewater treatment applications.
• Offshore Fiberglass Structures Custom FRP structures designed for offshore oil & gas platforms and marine terminals, including cabletray, ladders, ladder cages, platforms, walkways, handrails, and other salt-spray-rated components.
• FRP Buildings & Enclosures FRP buildings and enclosures for housing equipment and controls in corrosive water, chemical, and industrial environments, providing weather and corrosion protection where metal buildings would degrade.

Named customers8 records

Segments5 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• Spagco, Inc.coreOthersSpagco, Inc. is a sister company to Glass-Steel, Inc. Spagco produces Parshall Flumes constructed from fiberglass composite with polymer concrete core. The two companies share manufacturing capabilities and operate as affiliated entities in the fiberglass fabrication industry.

Scale indicators2 records

Recent moves5 records

Expansion highlights4 records

Direct peers

• AIMS International: Houston-based custom FRP fabricator serving chemical, oil & gas, and water/wastewater customers with structures, grating, and handrail - geographic and end-market overlap with Glass-Steel's Texas-anchored industrial customer base.
• Strongwell Corporation: The largest US pultruded FRP manufacturer, producing structural shapes, grating, handrail, and ladder systems for the same industrial and municipal markets Glass-Steel serves - most direct competitor on EXTREN-style profiles and custom water/wastewater structures.
• Enduro Composites: Manufacturer of fiberglass reinforced plastic (FRP) products including structural shapes, grating, and custom fabrications for industrial and water/wastewater applications - comparable custom-fabrication capabilities and customer overlap.
• Bedford Reinforced Plastics: Producer of EXTREN competitor profiles, fiberglass grating, handrail, and structural shapes used in water/wastewater, chemical, and architectural applications - directly competes with Glass-Steel on FRP structural product categories.
• Fibergrate Composite Structures (RPM International): National FRP grating, structural shape, and stair systems manufacturer serving industrial, municipal, and offshore markets with standardized and custom FRP walkways - comparable scope to Glass-Steel's handrail, platform, and grating products.
• Creative Pultrusions (Exel Composites): Manufacturer of EXTREN pultruded fiberglass structural shapes - the very product family Glass-Steel distributes - making it both a peer and a strategic supplier dependency for structural shapes and custom FRP profiles.

Others

• McNichols: National metals and FRP product distributor carrying fiberglass grating, structural shapes, and handrail - comparable product catalog but functions as a distribution and fabrication partner rather than direct bid competitor on custom municipal projects.

Regional players

• Fiber Reinforced Plastics (FRP) of Texas: Regional Texas-based FRP manufacturer producing similar grating, handrail, and structural products for industrial and municipal customers - competing primarily in the same Southwest geography.

Broad incumbents

• Joslyn (A Hubbell brand): Broader industrial supplier offering fiberglass products among a much wider electrical, utility, and infrastructure portfolio - addresses similar municipal/water markets from a portfolio position rather than specialization.

Emerging players

• Marco Fiberglass: Smaller custom FRP fabricator for industrial and water/wastewater customers - overlapping product categories at smaller scale, competing on similar bespoke trough and baffle work.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

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 Glass-Steel