Have you ever noticed how often fiberglass pultruded profiles are used in everyday industrial environments? From corrosion-resistant walkways and wastewater treatment facilities to railway infrastructure and electrical insulation systems, pultruded fiberglass has become an important alternative to traditional steel and other materials. But what happens when you need to source the right fiberglass pultrusion products for your project in the UK? How do you compare manufacturers, evaluate technical specifications, control lead times, and ensure that the profiles meet your project's performance requirements?
This article is your guide to the world of fiberglass pultrusion manufacturers in the UK. Whether you're a construction contractor looking for durable structural profiles, an engineer seeking reliable load-bearing GRP sections, or an industrial buyer sourcing customized FRP components, this guide will introduce key manufacturers and suppliers, compare their product ranges and manufacturing capabilities, and help you understand the factors that matter most when selecting a fiberglass pultrusion partner.
The List of Fiberglass Pultrusion Companies in the UK
| Manufacturer | Main Fiberglass Pultrusion Products | Key Industries | Manufacturing Capabilities |
|---|---|---|---|
| SUSDURA | Custom FRP structural profiles, pultruded tubes, rods, and sections | Construction, infrastructure, industrial engineering, water treatment | Custom profile manufacturing and composite material solutions |
| Pultrex Ltd | Pultruded tubes, solid rods, flat bars, and structural sections | Construction, railways, electrical applications, ladders, and walkways | Multiple pultrusion lines, standard profiles, and profile development |
| RBJ Reinforced Plastics Ltd | GRP rods, round tubes, square tubes, rectangular tubes, and custom sections | Industrial OEM, construction, sports and recreation, electrical applications | Pultrusion, pull winding, filament winding, and custom profile development |
| SAN Composites Ltd | Pultruded rods, round tubes, square tubes, angles, and channels | Electrical, construction, marine, automotive, and medical applications | Standard profile dies, custom pultrusion, and composite machining |
| Fibrolux GmbH | GRP special profiles, C-channels, structural profiles, and reinforcement bars | Chemical processing, infrastructure, energy, and water management | Standard and custom pultrusion, machining, pre-assembly, and engineering |
1. SUSDURA
Headquarters: China, Zhejiang Province, Ningbo
Main Fiberglass Pultrusion Products: Custom pultruded FRP structural profiles, fiberglass tubes, pultruded rods, and customized structural sections.
Company Overview: SUSDURA provides FRP composite solutions for industrial and infrastructure applications, making it an international sourcing option for UK buyers looking for lightweight, corrosion-resistant alternatives to conventional metal components. Its product offering focuses on composite profiles and customized solutions for projects that require particular cross-sections, material properties, and component dimensions. For UK construction contractors, equipment manufacturers, water-treatment projects, and industrial OEMs, custom pultruded profiles can help reduce component weight and maintenance requirements in demanding operating environments. As a China-based supplier rather than a UK manufacturer, SUSDURA offers an additional sourcing option for buyers comparing customized FRP profiles, production requirements, and international supply arrangements. Product specifications and manufacturing processes should be confirmed for each requested profile.
Company Advantages: International OEM sourcing, customized composite profile options, and the ability to discuss profile requirements for industrial applications.
Suitable Customers: UK industrial OEMs, construction contractors, infrastructure suppliers, water-treatment equipment manufacturers, distributors, and importers.
2. Pultrex Ltd
Established: 2003
Headquarters: United Kingdom, England, Essex, Manningtree
Main Fiberglass Pultrusion Products: Pultruded fiberglass tubes, solid rods, flat bars, and structural angle, box, and channel sections.
Company Overview: Pultrex is a UK-based composite technology company with a dedicated profiles division supplying pultruded and pullwound products to UK and European customers. Its published product range covers standard sections used in handrails, ladders, walkways, cable management, construction components, and other industrial applications. The company reports operating five pultrusion lines around the clock for six days per week, supporting high-volume production requirements. Its profile development service also helps customers develop sections for specific applications rather than relying exclusively on off-the-shelf dimensions. For UK buyers, Pultrex is particularly relevant when local manufacturing, repeatable profile production, and established standard-section options are important purchasing criteria.
Company Advantages: UK-based production, five reported pultrusion lines, an established standard profile range, and experience supporting profile development from design through production.
Suitable Customers: UK construction companies, rail contractors, industrial OEMs, infrastructure suppliers, ladder manufacturers, and electrical equipment manufacturers.
3. RBJ Reinforced Plastics Ltd
Headquarters: United Kingdom, England, Hertfordshire, Rickmansworth
Main Fiberglass Pultrusion Products: Unidirectional GRP tubes, GRP square and rectangular tubes, fiberglass angle sections, and fiberglass channel sections.
Company Overview: RBJ Reinforced Plastics specializes in pultrusion, pull winding, and filament winding for glass-fibre-reinforced and carbon-fibre-reinforced profiles. The company states that it has more than 30 years of experience serving OEM customers in technically demanding applications. Its standard GRP range includes tubes and structural sections, while its custom manufacturing capability supports non-standard dimensions and profile requirements. Published product information describes pultruded GRP tubes made with a polyester matrix and square or rectangular profiles manufactured with cross-ply reinforcement arrangements for improved properties across the profile section. These options make RBJ relevant to UK customers seeking repeatable profile dimensions, specific mechanical characteristics, and technical support for components used in equipment and engineered assemblies.
Company Advantages: More than 30 years of stated experience, multiple composite processing methods, standard stock profiles, and the ability to manufacture non-standard profile thicknesses.
Suitable Customers: Industrial OEMs, composite component manufacturers, equipment designers, construction suppliers, sports equipment manufacturers, and electrical product manufacturers.
4. SAN Composites Ltd
Headquarters: United Kingdom, England, West Midlands, Coventry
Main Fiberglass Pultrusion Products: Pultruded GRP rods, round tubes, square tubes, angle profiles, and channel profiles.
Company Overview: SAN Composites manufactures and machines composite materials and engineering plastics, with a dedicated pultrusion offering for continuous profiles with constant cross-sections. Its published standard range includes rods, round and square tubes, angles, channels, GRP cable troughs, and custom profiles. The company describes its approach as selecting suitable resin systems, reinforcements, fillers, and additives to achieve the required balance of weight, mechanical performance, corrosion resistance, electrical insulation, and flame resistance. For UK buyers, this range is relevant to applications where profile geometry and material formulation must suit the intended operating environment. SAN Composites also offers machining alongside profile manufacturing, supporting customers who need composite components prepared for integration into larger assemblies.
Company Advantages: A broad range of standard pultrusion dies, custom profile options, knowledge of resin and reinforcement selection, and combined composite manufacturing and machining services.
Suitable Customers: Electrical equipment manufacturers, construction companies, marine equipment suppliers, automotive component manufacturers, medical equipment manufacturers, and industrial OEMs.
5. Fibrolux GmbH
Established: 1979.
Headquarters: Germany, Hesse, Hofheim am Taunus
Main Fiberglass Pultrusion Products: Standard GRP structural profiles, custom GRP special profiles, GRP C-channels, and FRP reinforcement bars.
Company Overview: Fibrolux is a European manufacturer of pultruded glass-fibre-reinforced and carbon-fibre-reinforced profiles. Since 1979, it has developed a manufacturing operation that combines materials expertise, pultrusion, machining, pre-assembly, and project support at its Hofheim am Taunus site in Germany. Its product range includes standard profiles, custom cross-sections, and machined profiles supplied cut to size, drilled, or milled. The company also supports project-specific profile development by considering geometry, fibre structure, resin systems, and subsequent assembly requirements. For UK buyers, Fibrolux offers an established European alternative for infrastructure, chemical processing, water management, and industrial projects requiring standard or customized GRP profiles.
Company Advantages: Manufacturing experience dating to 1979, standard profiles and customized cross-sections, integrated machining and pre-assembly, and European production serving international markets.
Suitable Customers: UK infrastructure contractors, chemical plants, water-treatment operators, renewable energy companies, industrial engineering firms, and GRP structure fabricators.
Frequently Asked Questions
1. What is the difference between buying stock GRP profiles and ordering custom pultruded sections?
Stock profiles usually avoid new tooling and may be available in standard lengths, while custom sections can require die development, sample approval, and a dedicated production run. Some UK suppliers offer stock lengths around 3 m, while other products may be stocked in 5 m or 6 m lengths; availability varies by supplier and profile. Before choosing, compare the required cross-section, available length, minimum quantity, machining needs, and delivery date. A stock profile may reduce initial cost, but it is not a suitable substitute if its dimensions or structural properties fail the project requirements.
2. Can pultruded GRP profiles be supplied with holes, cut lengths, or machined ends?
Many composite suppliers offer cutting and machining services, but the available operations depend on the profile geometry and supplier facilities. Specify the finished length, hole diameter and position, end treatment, quantity, and dimensional tolerances on a drawing. Ask whether machining is performed in-house or by a subcontractor, whether the quoted price includes inspection, and whether drilling or cutting requires additional finishing. For a new design, approve a sample before batch production to reduce the risk of incorrectly positioned holes or profiles that do not fit the assembly.
3. How can I calculate the load capacity of a pultruded GRP beam over a 2 m or 3 m span?
Do not calculate allowable load from tensile strength alone. Request the exact profile's section properties, flexural modulus, load tables, support conditions, and permitted deflection. A 3 m span can behave very differently from a 2 m span, even when the same profile is used, because bending and deflection depend on span, loading arrangement, and section stiffness. Ask the manufacturer or a qualified structural engineer to check the actual span, point or distributed loads, support spacing, and connection details against the project's design requirements.
4. Which resin should I choose for pultruded GRP profiles used in wastewater treatment plants?
Choose the resin according to the actual chemicals, concentration, temperature, and exposure duration. Polyester may be suitable for some general industrial environments, while vinyl ester or another specialist resin may be required for more aggressive chemical exposure. Do not assume that every GRP profile is suitable for continuous immersion or concentrated chemicals. Send the supplier the chemical names, concentrations, operating temperatures, and cleaning agents, and request written compatibility confirmation for the specific resin and profile.
5. Are pultruded fiberglass profiles suitable for outdoor use in the UK's wet climate?
Pultruded GRP profiles can be used outdoors, but suitability depends on the resin, surface finish, UV protection, and operating environment. For continuously exposed installations, ask whether the profile incorporates a UV-resistant surface veil, coating, or suitable resin formulation, and request relevant weathering information where available. For coastal locations, separately confirm resistance to salt exposure and the required mechanical performance. Moisture resistance alone does not establish long-term suitability for every outdoor application.
6. What dimensional tolerances should I confirm before ordering pultruded GRP profiles?
Confirm the finished cross-section dimensions, wall thickness, straightness, cut length, and any hole or machining tolerances on the approved drawing. Nominal dimensions are not necessarily guaranteed finished dimensions, and tolerance requirements may differ between standard and custom profiles. If the profile must fit an existing bracket or assembly, request a first-article sample and dimensional inspection report before authorizing the full batch. Specify tolerances numerically on the purchase order instead of relying on descriptions such as “precision cut.”
Conclusion
Choosing the right fiberglass pultrusion supplier in the UK depends on the profile geometry, structural performance, corrosion resistance, production volume, and delivery requirements of your project. Pultrex and RBJ offer UK-based pultrusion manufacturing, while SAN Composites provides standard and custom profile manufacturing alongside machining. Fibrolux is an established European manufacturer, and SUSDURA offers an international sourcing option for customized FRP profiles.
For UK buyers sourcing custom pultruded fiberglass structural profiles, SUSDURA is worth considering when project-specific dimensions and industrial application requirements are important. Its FRP profile solutions can be evaluated for construction, infrastructure, and water-treatment applications according to the required specifications. Visit SUSDURA to explore its composite solutions, or contact the SUSDURA team to discuss your profile requirements and request a project quotation.
