What Stahlin does

Stahlin Enclosures is a US-based manufacturer of non-metallic electrical and instrumentation enclosures, organized around three material platforms: fiberglass, polycarbonate, and PVC. Founded in 1935 in Belding, Michigan, and operated since 1977 as a brand under family-owned conglomerate Robroy Industries (Verona, Pennsylvania, established 1905), Stahlin pioneered the world's first electrical fiberglass enclosure in the 1960s. The catalog spans 885+ products across multiple named series including Diamond Shield, PolyStar (White and Black), N Series, J/JW, RJ/RJW, CF, F, Disconnect, DuraBoxx, Classic, NewSentry, and PolySlim, all certified to UL, CSA, NEMA, and IEC standards with select models tested to MIL-STD-285 for EMI/RFI shielding.

The company sells both standard off-the-shelf enclosures and customized units through three branded service programs: SelectRight for product selection, ModRight for factory modifications (holes, cutouts, windows, silk-screening, EMI/RFI shielding, custom sizes and colors, value-add assembly), and DeliverRight for logistics including on-time delivery, kitting, and custom labeling. Distribution combines a field sales rep network across 10 North and Central American countries, ANSI X12 EDI for B2B transactions, a MyAccount e-commerce portal for standard and custom quoting, and supporting marketing through content, video, case studies, and trade events.

Stahlin serves OEMs and industrial end-users across 12+ verticals including solar, wastewater treatment, utilities, telecommunications, electrical equipment manufacturing, food and beverage, agriculture, car washes, mining, oil and gas, marine, and lighting control. Over 95% of products are manufactured in the United States. The company is privately held with no external institutional investment or public listing, operating as a stable, mature industrial brand within the larger Robroy Industries portfolio.

Name

Stahlin

Legal name

Stahlin

Website

https://stahlin.com

Company type

Private

Founded year

1935

Operating status

Operating

Headcount range

101–250 employees

Short description

Stahlin Enclosures manufactures non-metallic electrical enclosures (fiberglass, polycarbonate, and PVC) for OEM and industrial customers across solar, wastewater, utilities, telecom, and food and beverage sectors, primarily in North and Central America.

Ownership category

akta.pro rank

Product category

Non-Metallic Electrical Enclosures

NAICS

Other Electronic Component Manufacturing (334419)

SIC

Electrical Industrial Apparatus (3620), Electronic & Other Electrical Equipment (No Computer Equip) (3600)

akta.pro primary industry

Wiring Devices & Receptacles (switches, sockets, plugs, industrial outlets, pin & sleeve) (IMAGAEAF)

akta.pro secondary industry

EMI/EMC & Filtering Components (Common-mode chokes, filters, shielding materials) (IMAGAJAN)

Keywords

• Non-metallic enclosures
• Fiberglass enclosures
• Polycarbonate enclosures
• Electrical enclosures
• Enclosure customization

Headquarters

HQ city

Belding

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Non-Metallic Enclosure Sales: Sale of fiberglass, polycarbonate, and PVC enclosures and accessories for electrical and instrumentation applications. Products sold through direct sales, representative network, and e-commerce channels. Includes both standard off-the-shelf products and custom ModRight modified enclosures.
2. Customization Services (ModRight): Value-added modification services including custom holes and cutouts, custom windows, EMI/RFI shielding, custom sizes, custom colors, custom back panels, and value-add assembly for OEM applications.
3. Accessories and Replacement Parts: Sale of enclosure accessories including back panels, breathers/drain vents, hole plugs, cable glands, pole mount kits, and replacement covers.

Pricing tiers

Go-to-market motion3 records

Distribution channels5 records

Marketing channels7 records

Core offering

Stahlin designs and manufactures non-metallic electrical and instrumentation enclosures in fiberglass, polycarbonate, and PVC materials, offering both standard in-stock catalog products (Diamond Shield, PolyStar, N Series, J/JW Series, RJ/RJW Series, Disconnect, DuraBoxx, Classic, NewSentry, PolySlim, CF Series, F Series) and customized enclosures through its ModRight factory modification program. The company sells directly to industrial OEMs and end users in solar, wastewater, utilities, telecommunications, electrical equipment manufacturing, food and beverage, mining, oil and gas, marine, agriculture, and other verticals, complemented by accessories (HMI covers, back panels, vents, drains, pole mounts) and the DeliverRight logistics service.

Product overview

Stahlin Enclosures is a manufacturer of non-metallic electrical and instrumentation enclosures, organized into three primary material types: Fiberglass, Polycarbonate, and PVC enclosures. The product portfolio includes multiple distinct series under sub-brand names such as Diamond Shield Series, PolyStar (White and Black), N Series, J/JW Series, RJ/RJW Series, CF Series, F Series, Disconnect Series, DuraBoxx Series, Classic Series, and NewSentry Series. These are complemented by accessories including SolarShield HMI Covers, Polycarbonate Replacement Covers, SpeedPanel panels, Back Panels, Vents, Drains, and Cable Glands. Stahlin offers three service programs: SelectRight for product selection, ModRight for custom modifications (holes, cutouts, windows, printing, colors), and DeliverRight for logistics and delivery. The company positions its enclosures as corrosion-resistant alternatives to metallic enclosures, meeting IEC IP66/IP68 and NEMA 4X/6P ratings.

Differentiator

Problem solved

Functional benefit

Brands

• Diamond Shield: Fiberglass enclosure series featuring hinged designs with lockable pull latches, available in clear and opaque cover options.
• SolarShield
• PolyStar
• NewSentry
• PolySlim
• DuraBoxx
• Classic Series
• SelectRight
• ModRight
• DeliverRight

Products and services

• Diamond Shield Series Enclosures Premium fiberglass enclosures featuring hinged designs with lockable pull latches, available in clear and opaque cover options, designed for demanding industrial environments requiring robust protection.
• PolyStar Black Series Enclosures Tough, sleek black polycarbonate enclosures designed for applications requiring a dark aesthetic with impact resistance, chemical resistance, UV stability, and thermal insulation properties.
• PolyStar White Series Enclosures White polycarbonate enclosures offering robust sidewall impact resistance, corrosion resistance, and UV degradation protection for industrial and commercial environments.
• SolarShield HMI Covers Human-machine interface protection covers designed specifically for solar applications, providing UV protection and durability for HMI components in outdoor environments.
• PolySlim Low-Profile Enclosures Cutting-edge low-profile polycarbonate electrical enclosures designed for OEMs and installers requiring space-efficient solutions with the lightweight and durable properties of polycarbonate.
• Pole Mount Solutions Mounting solutions for pole installation of enclosures, designed for outdoor electrical applications with enhanced strength and smart design.
• N Series Enclosures Fiberglass wall mount and freestanding control tower enclosures, one of the original product families dating to the 1960s-1970s, still in production as a thriving product line.
• J Series and JW Series Enclosures Pushbutton enclosures and related configurations for industrial control panel installations, originally developed in the 1960s-1970s.
• Disconnect Series Enclosures Enclosures designed specifically for disconnect applications in electrical systems, providing reliable protection and code-compliant housing.
• RJ and RJW Series Junction Enclosures Junction box enclosures designed for electrical and instrumentation applications requiring reliable protection in indoor and outdoor environments.
• CF Series Small Junction Enclosures Compact junction enclosures for space-constrained electrical applications, manufactured in fiberglass for corrosion resistance and durability.
• F Series PushButton Enclosures Pushbutton enclosures for industrial control panel installations in fiberglass construction.
• DuraBoxx Series Enclosures Durable enclosure series designed for demanding industrial and commercial environments requiring reliable protection against environmental hazards.
• Classic Series Enclosures Traditional enclosure designs offering reliable protection for standard industrial applications across electrical and instrumentation installations.
• NewSentry Series Enclosures Fiberglass enclosures designed for sentry applications requiring robust environmental protection.
• Polycarbonate Replacement Covers Replacement covers for polycarbonate enclosures enabling easy maintenance and component upgrades.
• SpeedPanel for Diamond Shield Enclosures Panel accessory for Diamond Shield enclosures designed to enhance installation speed and structural strength for industrial enclosure applications.
• Enclosure Accessories (Back Panels, Vents, Drains, Cable Glands) Supplementary enclosure components including back panels (Aluminum, ABS, Painted Carbon Steel, and other materials), breathers/drain vents, hole plugs, cable glands, and pole mount kits for Stahlin enclosures.
• ModRight Custom Modification Service Factory-based custom enclosure modification service for engineers and designers, offering custom holes and cutouts, custom windows, EMI/RFI shielding, custom sizes, custom colors, custom back panels, silk-screening, digital printing, and value-add assembly to address OEM applications that standard off-the-shelf products cannot solve.
• DeliverRight Logistics Service Customer-first delivery service ensuring on-time delivery, direct shipment, bulk packaging, kitting, and custom labeling options for enclosure orders.
• SelectRight Product Selection Service Product selection service providing extensive standard, configurable, and off-the-shelf enclosure options to help customers meet specific application requirements and optimize initial costs.

Quantifiable outcome

• Corrosion resistance eliminates rust and degradation, reducing long-term maintenance costs compared to metal enclosures
• +2 more outcomes

Segments12 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Scale indicators4 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Rittal: Rittal is one of the world's largest enclosure manufacturers, offering a broad portfolio including polycarbonate and fiberglass enclosures. As a global broad incumbent, Rittal competes with Stahlin across industrial verticals and brings greater scale, configurator tools, and global reach.
• nVent (Hoffman brand): nVent's Hoffman brand is a leading global manufacturer of electrical enclosures, including both metallic and non-metallic offerings. While much larger and more diversified, Hoffman competes directly with Stahlin in industrial, utility, and OEM enclosure markets.
• Schneider Electric (Spacial enclosures): Schneider Electric's enclosure portfolio (Spacial, Thalassa) competes with Stahlin in industrial, energy, and infrastructure applications. As a global broad incumbent, Schneider offers both metallic and non-metallic solutions as part of a much larger electrical equipment portfolio.
• Hammond Manufacturing: Hammond Manufacturing produces electrical enclosures, cabinets, racks, and electronic packaging. As a broad incumbent, Hammond offers both metallic and non-metallic enclosures and competes with Stahlin across industrial and OEM segments.
• Eaton (Crouse-Hinds): Eaton's Crouse-Hinds division offers hazardous-location and industrial enclosures, competing with Stahlin in oil & gas, mining, and heavy industrial verticals. Eaton is a broad incumbent with significantly greater scale and global reach.

Direct peers

• Fibox: Fibox specializes in polycarbonate and ABS enclosures for industrial and electrical applications, competing with Stahlin's polycarbonate product lines. The company serves similar OEM and industrial customers with comparable NEMA/IP-rated products.
• Allied Moulded Products: Manufacturer of fiberglass and polycarbonate non-metallic electrical enclosures. Allied Moulded is the closest direct competitor to Stahlin, offering similar NEMA-rated enclosures for industrial, solar, and wastewater applications with comparable customization services.
• Polycase: Polycase manufactures plastic and metal electronic enclosures, with a strong focus on polycarbonate offerings. As a direct peer in non-metallic enclosures, Polycase serves similar industrial and electronic OEM customers with comparable customization options.
• Stahlin Shop: Attabox manufactures polycarbonate enclosures designed for industrial and corrosive-environment applications. Attabox is a direct peer to Stahlin's polycarbonate product lines, serving similar water/wastewater and outdoor industrial customers with comparable NEMA 4X ratings.
• Integra Enclosures: Manufacturer of polycarbonate and ABS plastic enclosures for electrical and electronic applications. Integra is a direct peer focused on the same non-metallic enclosure niche, with comparable NEMA-rated product lines targeting industrial and OEM customers.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks7 records

Key highlights7 records

Customer concentration

• Xx.com/_stahlin
• Facebookfacebook.com/StahlinEnclosures
• LinkedInlinkedin.com/company/stahlin

Compliance10 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

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 Stahlin