What Dartford Composites does

Dartford Composites Ltd is a UK-based specialist manufacturer of GRP (Glass Reinforced Plastic) and phenolic GRP (GRP(ph)) fire-retardant composites, founded in 1989 and operating from a single site at Jubilee Works, Ness Rd, Erith, Kent. The company designs, manufactures, and refurbishes composite components and assemblies for the rail industry — its primary vertical — producing custom train interior and exterior parts, replacement seat shells, toilet mouldings, sink units, and reverse-engineered replacements for obsolete rolling stock components, with selective fire-rated compliance (BS5746 pt 6 & pt 7 class 1/0). Beyond rail, the business runs adjacent service lines in marine lifeboat and vessel repair, anti-graffiti coating application for municipal assets, aircraft interior finishing, and general custom moulding for industrial customers.

Name

Dartford Composites

Legal name

Dartford Composites Ltd

Website

https://dartfordcomposites.co.uk

Company type

Private

Founded year

1989

Operating status

Operating

Headcount range

11–50 employees

Short description

Dartford Composites is a UK-based GRP and phenolic fire-retardant composites manufacturer founded in 1989, specialising in custom moulding and refurbishment for rail operators, with adjacent marine, aircraft interior, anti-graffiti, and general industrial service lines.

Ownership category

akta.pro rank

Product category

Composite Manufacturing and Rail Refurbishment

NAICS

Plastics and Rubber Products Manufacturing (326)

SIC

Plastic Material, Synth Resin/Rubber, Cellulos (No Glass) (2820)

akta.pro primary industry

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

Keywords

• GRP composite manufacturing
• Rail component refurbishment
• Phenolic resin moulding
• Fire retardant composites
• Marine repair services

Headquarters

HQ city

Kent

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Custom Manufacturing: Manufacturing of custom made GRP products for rail, marine, and general industrial applications. Services range from 'one-offs' through to complete long-term production runs. Includes reverse engineering of obsolete components.
2. Repair and Refurbishment Services: On-site and factory-based repair services for rail vehicles, ships, and life boats. Includes refurbishment projects for train interiors and exteriors. Revenue is project-based, responding to damage repair, vandalism, and fleet refresh programs.
3. Anti-Graffiti Solutions: Supply and application of anti-graffiti coatings and treatments for municipal assets including bus shelters, trains, lamp posts, and buildings. Includes ongoing maintenance and repair services.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels4 records

Core offering

Dartford Composites Ltd manufactures custom GRP (Glass Reinforced Plastic) and fire-retardant phenolic resin (GRP(ph)) components, primarily for the UK rail industry. The company delivers a one-stop composite manufacturing, repair, refurbishment, and anti-graffiti coating service spanning one-off prototypes through to long-term production runs, including reverse engineering of obsolete parts.

Product overview

Dartford Composites is a specialist GRP (Glass Reinforced Plastic) and GRP(ph) fire retardant composites manufacturer serving primarily the rail industry, with additional operations in marine, aircraft interiors, and general commercial moulding sectors. The company operates as a single unified service offering spanning five core service lines: Rail Repairs/Refurbishment, Rail Manufacturing, Marine Repairs, Anti Graffiti Solutions, and General Moulding. The Rail Manufacturing service encompasses specific products including seating systems, interior panels, toilet mouldings, sink units, and seat shells. Each service line functions as both a standalone offering and part of an integrated "one-stop shop" approach, with the company capable of handling everything from custom manufacturing to reverse engineering of obsolete components. The portfolio includes notable projects such as the Croydon Tram Refresh, C2C Replacement Seat Shells, Virgin East Coast Project 21 sink units, Eurotunnel Door Refurbishment, Trueform Street Furniture for TfL, and the Russian Orthodox Cathedral dome.

Differentiator

Problem solved

Functional benefit

Products and services

• Rail Repairs/Refurbishment
• Rail Manufacturing Custom manufacturing of rail components including seating, interior panels, toilet mouldings, sink units, seat shells, and GRP parts, including reverse engineering of obsolete components. Targeted at UK rail operators, train manufacturers, and rolling stock refurbishment programmes.
• Marine Repairs Specialist GRP repair services for ships, lifeboats, and similar marine craft, delivered both at the Erith factory and on-site at European ports. Includes time-critical emergency lifeboat repair with rapid turnaround. Targeted at shipping companies, port operators, and marine asset owners across Europe.
• Anti Graffiti Solutions Supply and application of anti-graffiti coatings and treatments for internal and external surfaces, including lamp posts, bus shelters, bridges, buildings, and transport assets, plus ongoing maintenance and graffiti removal. Targeted at local authorities, councils, and municipal asset owners.
• General Moulding Custom GRP moulding services producing parts from one-off prototypes through to complete long-term production runs, including tooling manufacturing. Targeted at industrial, automotive, utilities, construction, and home improvement customers requiring custom GRP components.
• Aircraft Interiors Aircraft panel finishing and refurbishment service operating on the same principles and quality processes as the rail interior service. Targeted at aircraft operators, MRO providers, and aircraft interior refurbishment customers.

Quantifiable outcome

• A substantial saving for c2c customer through innovative silicone mould vacuum system for seat shell replacement
• +3 more outcomes

Named customers9 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

One partnership is on record.

• Trueform EngineeringcoreStrategic or Co-development PartnerDCL worked with Trueform Engineering to develop the 'landmark shelter roof' for TfL. This new design roof is being rolled out throughout Greater London area with over 8,000 units planned. DCL provides GRP roofs and seats as part of this partnership.

Scale indicators5 records

Recent moves7 records

Expansion highlights5 records

Broad incumbents

• Strongwell Corporation: US-headquartered manufacturer of fibre-reinforced polymer (FRP) structural products, including pultruded and moulded composites for infrastructure, transit, and industrial applications. Comparable as a broader incumbent in FRP/GRP mouldings for transport, but at significantly greater scale.
• Exel Composites: Global pultruded and pull-wound composites manufacturer serving transportation, construction, and industrial markets. Comparable in fire-rated composite profiles and panels used in rail and transport infrastructure, but operates at a much larger scale across multiple geographies.
• Saint-Gobain Composite Solutions: Global materials group with composite and fire-rated product lines serving rail, aerospace, and construction. Comparable in fire-rated composite materials and components supplied to rail OEMs, but operating as part of a much broader materials portfolio.

Direct peers

• Permali Gloucester: UK-based manufacturer of GRP and composite components with a long-standing focus on rail, defence, and industrial applications. Highly comparable to Dartford Composites in terms of composite materials, fire-rated mouldings, and rail industry customer base in the UK.
• Alan Harper Composites: UK GRP and composite moulding manufacturer producing custom mouldings for rail, industrial, and architectural applications. Comparable in product type (custom GRP mouldings) and in serving UK rail customers with fire-rated and structural composite parts.
• Tufcot Engineering: UK-based manufacturer of composite wear parts and engineered components serving rail, marine, and industrial markets. Comparable in custom composite manufacturing, UK rail exposure, and small specialist manufacturer profile.
• Crosby Composites: UK manufacturer of advanced composite components serving motorsport, aerospace, and industrial markets. Comparable as a UK-based custom composite moulding specialist operating at a similar sub-£20m scale with project-based engineered work.

Emerging players

• Shape Machining: UK precision machining and composite components supplier serving motorsport, aerospace, and niche industrial customers. Comparable as a small UK-based custom composite component manufacturer with a similar project-based, engineered-product model.
• MPM Ltd (Moulded Plastics & Mouldings): UK custom plastics moulding and composite fabrication business serving industrial and transport customers. Comparable in custom moulding, GRP/phenolic fabrication, and small-batch engineered plastic products in the UK.

Regional players

• Brodie Smith Rail Refurbishment: UK rail vehicle refurbishment and repair services provider. Comparable as a UK-focused rail interior and exterior refurbishment business competing for similar TOC and OEM work, but focused on mechanical/electrical overhaul rather than GRP moulding.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 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 Dartford Composites