Name

Spunstrand

Legal name

Spunstrand, Inc.

Website

https://spunstrand.com

Company type

Private

Founded year

1960

Operating status

Operating

Headcount range

11–50 employees

Ownership category

akta.pro rank

Product category

Fiberglass Reinforced Plastic (FRP) Duct and Piping Manufacturing

NAICS

Plastics Pipe, Pipe Fitting, and Unlaminated Profile Shape Manufacturing (32612)

SIC

Plastic Materials, Synth Resins & Nonvulcan Elastomers (2821), Gaskets, Packg & Sealg Devices & Rubber & Plastics Hose (3050)

akta.pro primary industry

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

akta.pro secondary industry

Fiber- & Mineral-Filled Reinforced Compounds (Glass/Carbon/Talc/CaCO3) (IMANABAI)

Keywords

• Fiberglass reinforced duct
• Corrosion-resistant ductwork
• Industrial scrubber systems
• Chemical storage tanks
• Mine ventilation duct

Headquarters

HQ city

Coeur D'alene

HQ country

United States

HQ region

North America

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. FRP Duct and Piping Sales: Manufacture and sale of filament wound fiberglass reinforced plastic duct and piping for HVAC, industrial, and municipal applications in standard sizes 2 to 120 inches diameter
2. Scrubber Systems: Carbon scrubbers, bio-scrubbers, and chemical fume exhaust scrubbers ranging from 200 CFM to 46,000 CFM capacity; includes vertical bed, horizontal bed, and custom configurations
3. FRP Storage Tanks: Custom configured chemical and water storage tanks with filament wound construction; includes fittings, stiffening ribs for burial, insulation options, and specialty curing systems
4. Couplings and Accessories: Strand-Tite commercial couplings and Strand-Lock industrial couplings sold as premium upcharge options with labor savings benefits
5. Engineering and Consulting Services: Design assistance, duct sizing, structural calculations, shop drawing reviews, quality control procedures, on-site factory training, and field support services

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels4 records

Core offering

Spunstrand manufactures fiberglass reinforced plastic (FRP) duct, scrubbers, dampers, chemical storage tanks, and couplings using a proprietary in-line filament winding process that controls glass-to-resin ratios for high strength and corrosion resistance. Its products target commercial construction, industrial plants, municipal utilities, mining, and tunneling applications, with engineered-to-order capabilities supported by an in-house engineering services group. The portfolio spans Underslab HVAC duct, industrial/municipal duct, thermoplastic duct, mine and tunnel ventilation duct, Zero-Leak and balancing dampers, Strand-Tite and Strand-Lock couplings, FlameStar flame-resistant duct, carbon/chemical/bio scrubbers, and FRP storage tanks.

Product overview

Spunstrand Inc. manufactures fiberglass reinforced plastic (FRP) products for industrial, municipal, and commercial applications. The product portfolio centers on duct systems (underslab HVAC, industrial/municipal, thermoplastic, mine ventilation), air pollution control equipment (carbon scrubbers, chemical fume exhaust scrubbers, bio scrubbers), storage tanks, and accessories (couplings, dampers). The company operates as a single unified manufacturing operation with products designed for direct burial, corrosive fume handling, and environmental control applications. Key product lines include Underslab HVAC Duct for commercial/residential buildings, Industrial/Municipal duct for corrosive environments, Carbon and Bio Scrubbers for odor/VOC control, FRP Tanks for chemical storage, and specialized couplings (Strand-Tite, Strand-Lock) and dampers (Zero-Leak, Balancing).

Differentiator

Problem solved

Functional benefit

Brands

• Strand-Tite: Strand-Tite commercial coupling - underground couplings developed to save labor on prep and install, exceeding toughest burial conditions. Highly corrosion resistant and watertight under extreme hydrostatic pressures. Available in sizes 3"Ø up to 24"Ø, tested to 5 PSI with 5 to 1 safety factor.
• Strand-Lock
• Flow-Strand
• Green-Strand
• Green-Strand Flex
• Fiber-Max
• Unobtainium
• FlameStar

Products and services

• Underslab HVAC Duct Fiberglass reinforced plastic duct engineered for direct burial under concrete slabs in residential and commercial HVAC systems; resists corrosion, moisture, and compression for underslab air distribution.
• Industrial/Municipal Duct Corrosion-resistant fiberglass reinforced plastic ductwork for industrial plants (chemical, petrochemical, semiconductor, pharmaceutical, electronics, pulp and paper) and municipal water/wastewater facilities, available with isophthalic or vinyl ester resin constructions.
• Carbon Scrubbers Vapor-phase carbon scrubber systems designed to remove contaminants from industrial exhaust streams, sold alongside FRP duct for air pollution control applications.
• Chemical Fume Exhaust Scrubbers FRP scrubber systems engineered for chemical fume exhaust applications, manufactured alongside Spunstrand's duct-to-scrubber transitions for integrated air pollution control.
• Biological (Bio) Scrubbers Biological scrubber systems designed for odor and VOC control at municipal and industrial sites, integrated with FRP ductwork for complete air treatment solutions.
• Mine & Tunnel Ventilation Duct FRP ventilation duct engineered for underground mining and tunneling applications, with flame-resistant and abrasion-tolerant construction and MSHA approval.
• FRP Chemical Storage Tanks Above-ground fiberglass reinforced plastic chemical storage tanks in single-wall and double-wall configurations for industrial and municipal chemical containment applications.
• Thermoplastic Duct Thermoplastic ductwork for applications requiring chemical resistance beyond standard FRP, complementing Spunstrand's FRP duct portfolio.
• Zero-Leak (ZL) and Balancing (BA) Dampers FRP dampers including Zero-Leak models with elastomeric sealing for tight shutoff and Balancing Dampers for airflow regulation in industrial and commercial exhaust systems.
• Strand-Tite Commercial Couplings FRP couplings designed for commercial fiberglass duct joining without specialty tools, enabling faster installation on job sites.
• Strand-Lock Industrial Couplings Industrial-grade FRP couplings engineered for secure joining of fiberglass duct in demanding industrial and mining applications.
• FlameStar Flame-Resistant Duct Flame-resistant fiberglass duct designed to reduce flame propagation in mining and tunneling ventilation systems, complementing Spunstrand's mine and tunnel duct offering.
• Engineering Services In-house engineering services group supporting bid specification review, drawing development, design-build, and custom FRP fabrication for engineered-to-order projects.

Quantifiable outcome

• 50-75% labor savings in the field with Strand-Tite/Strand-Lock couplings compared to flanges or butt and wrap field joints
• +3 more outcomes

Named customers10 records

Segments4 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

One partnership is on record.

• GES BiotekcoreTechnology or IntegrationPartnership with GES Biotek for bio-scrubber and bio-trickling filter media. GES provides over 25 years of experience and supplies multiple media types including Flow-Strand lava rock, Green-Strand recycled glass media, and Fiber-Max organic media. GES has supplied over 3 million cubic feet of bio-oxidation media to municipal wastewater industry.

Scale indicators6 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Strongwell: Strongwell is a major U.S. manufacturer of FRP structural products using pultrusion and filament winding. Like Spunstrand, it serves industrial, commercial, and infrastructure customers with fiberglass reinforced composites, making it directly comparable in process, materials, and end markets.
• Plasti-Fab: Plasti-Fab manufactures FRP duct and corrosion-resistant products for industrial and commercial HVAC applications, overlapping directly with Spunstrand's underslab and industrial/municipal duct lines in materials, customer base, and channel approach.
• Enduro Composites: Enduro Composites produces fiberglass reinforced tanks, duct, and pipe for chemical, oil & gas, and water applications. It is a direct filament-wound FRP competitor to Spunstrand's industrial/municipal duct and storage tank product lines.
• Creative Pultrusions: Creative Pultrusions is a U.S. composite fabricator making pultruded and filament-wound FRP profiles, grating, and structural shapes. It competes with Spunstrand in supplying FRP materials and fabricated parts to industrial and infrastructure customers.
• Bedford Reinforced Plastics: Bedford Reinforced Plastics manufactures FRP rebar, profiles, and structural shapes serving construction, industrial, and utility markets. It is comparable to Spunstrand as a U.S. FRP fabricator with overlapping end customers and material systems.
• Xerxes (Shawcor): Xerxes, part of Shawcor's Pipeline & Industrial Services, is one of the largest North American manufacturers of FRP underground storage tanks for petroleum, chemical, and water applications. It competes directly with Spunstrand's FRP storage tank product line in comparable end uses.

Broad incumbents

• NOV (National Oilwell Varco): NOV operates a broad energy and industrial equipment portfolio that includes fiberglass pipe and tank systems (formerly Ameron/Fiberglass Systems). It overlaps with Spunstrand in FRP pipe, duct, and tank products for industrial and oilfield customers, but as one of many lines within a much larger industrial conglomerate.

Others

• Composites One: Composites One is North America's largest distributor of raw materials used in FRP fabrication, including resins, fiberglass reinforcements, and core materials. It is comparable as a key supplier into the FRP value chain in which Spunstrand operates rather than a direct competitor.
• Owens Corning: Owens Corning is a leading global supplier of fiberglass reinforcements and composite materials used in FRP fabrication. It is an upstream materials provider to fabricators like Spunstrand rather than a direct duct-and-tank competitor.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance7 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 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 Spunstrand