What CSD Sealing Systems does

CSD Sealing Systems is a Cramlington, UK-based specialist supplier of cable and pipe penetration sealing systems for safety-critical infrastructure. Founded in 1993, the company designs, manufactures, and installs proprietary products under seven registered trademarks — NOFIRNO®, FYLLOFOAM®, ACTIFOAM®, SLIPSIL®, GlandMod®, FYLLOFYS® and RISE® — providing certified multi-hazard protection against fire, water, gas, smoke and EMP. Core technology centres on proprietary intumescent and rubber-compound formulations, modular frames, and re-enterable sealing architectures; products are certified to EN 1366-3 (fire up to 4 hours, EI-240), EN 13501-1/2, KIWA ETA-18/0622, and sector-specific schemes (ATEX, DSEAR, WIMES, DNO approvals), and carry a 50+ year independently age-tested service life. The company maintains 1M+ seals installed across the UK and a portfolio of 3,000+ naval projects including the QEC Aircraft Carriers, Type 45 destroyers and Type 26 Frigates.

The company targets five primary verticals: Marine & Offshore, Power Generation & Transmission, Built Environment & Infrastructure, and Manufacturing & Industrial. Named enterprise customers span defence primes (BAE Systems, Babcock), telecoms (BT), engineering (Siemens), water utilities (Thames Water, Morrison Data Services, Anglian Water), construction (Kirby Engineering and Construction), and hyperscale data centres (Microsoft, KAO Data, K2 Data Centres). CSD’s go-to-market is direct enterprise field sales with full-service scope: design consultation, product supply, installation, training, inspection, and managed logistics. Pricing is project-based and not publicly disclosed, with revenue generated from one-time product sales, professional services (installation, training), and managed product supply.

CSD Sealing Systems is a privately held UK limited company (registration 2798799) with no disclosed institutional investors, funding rounds, M&A, or leadership changes. Its founder reference includes Hans Beele (Beele Engineering, Netherlands), suggesting an originating relationship with that Dutch technology partner, which today functions as an international enquiry-routing channel for non-UK/Ireland markets. Operating status is active, with an installed base spanning the UK and international infrastructure assets.

Name

CSD Sealing Systems

Legal name

CSD Sealing Systems

Website

https://csdsealingsystems.co.uk

Company type

Private

Founded year

1994

Operating status

Operating

Headcount range

11–50 employees

Short description

CSD Sealing Systems is a UK-based specialist supplier of certified cable and pipe penetration sealing systems serving marine, power, utilities, built environment, and manufacturing customers. Founded 1993 in Cramlington, it sells proprietary products including NOFIRNO® and ACTIFOAM® via direct enterprise field sales and installation services.

Ownership category

akta.pro rank

Product category

Cable & Pipe Penetration Sealing Systems

NAICS

Gasket, Packing, and Sealing Device Manufacturing (339991)

SIC

Gaskets, Packg & Sealg Devices & Rubber & Plastics Hose (3050)

akta.pro primary industry

Cable Glands, Sealing & Strain-Relief (glands, grommets, seals, cord grips, strain relief) (IMAGAEAI)

akta.pro secondary industries

Firestop & Penetration Sealing Materials (IMADAGAL), Hazardous-Location, Marine & Harsh-Environment Cable (IMADAMAO)

Keywords

• Cable transit systems
• Pipe penetration seals
• Fire stopping systems
• Cable duct seals
• Penetration sealing solutions

Headquarters

HQ city

Cramlington

HQ country

United Kingdom

HQ region

Europe

Offices1 record

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. Product Sales - Sealing Systems: Direct sales of proprietary cable and pipe penetration sealing products including NOFIRNO, FYLLOFOAM, ACTIFOAM, SLIPSIL, and related systems. Products are sold as complete sealing solutions with associated components and accessories.
2. Professional Services - Installation: Expert installation services by trained specialists ensuring compliant, high-performance sealing across all penetrations. Services include design consultation, site surveys, inspection, and remediation planning.
3. Training Services: Hands-on training programmes for installer and supervisor certification, covering preparation, installation, quality checks, and inspection. Delivered on-site or at training facilities.
4. Product Supply & Logistics: Managed logistics including phased deliveries, call-off scheduling, global export support, quality documentation, certification, and batch tracking. Tailored product supply matched to project cable/pipe schedules.

Go-to-market motion1 record

Distribution channels4 records

Marketing channels7 records

Core offering

CSD Sealing Systems designs, supplies, and installs certified cable and pipe penetration sealing systems that provide multi-hazard protection (fire, water, gas, smoke, and EMP) for critical infrastructure. Its proprietary product families (NOFIRNO, FYLLOFOAM, ACTIFOAM, SLIPSIL, GlandMod, FYLLOFYS) are complemented by design consultation, installation, training, and inspection services across marine, power, offshore, built environment, and manufacturing sectors.

Product overview

CSD Sealing Systems is a specialist provider of cable and pipe penetration sealing solutions for critical infrastructure. The product portfolio is centered around the NOFIRNO® product family (Multi Cable Transits, Rapid Duct Seal, Flexible Pipe Penetration Seals, and Plastic Pipe Penetration System), complemented by FYLLOFOAM® and ACTIFOAM® fire protection systems, FYLLOFYS® Fire Board, SLIPSIL® Sealing Plugs, and GlandMod® Multi-Gland System. Supporting infrastructure includes Transit Frames (Marine and standard), Frames and Conduit Systems, and Bolt Through Glands. Together, these products provide certified multi-hazard protection (fire, water, gas, smoke, and EMP) across diverse applications including marine, offshore, power, built environment, and manufacturing sectors. The systems are designed to be re-enterable, maintenance-free, and tested for 50+ year service life.

Differentiator

Problem solved

Functional benefit

Brands

• NOFIRNO®: Premium multi-hazard sealing product line including Multi Cable Transits, Rapid Duct Seal, Flexible Pipe Penetration Seals, and Plastic Pipe Penetration System. Provides fire, water, and gas protection with up to 4 hours fire resistance.
• FYLLOFOAM®
• ACTIFOAM®
• SLIPSIL®
• GlandMod®
• FYLLOFYS®
• RISE®

Products and services

• NOFIRNO® Multi Cable Transits Certified multi-cable transit system providing up to four hours of fire resistance and pressure-tested watertight performance for sealing mixed-diameter cables in walls, floors, and bulkheads. Durable, re-enterable, and used in civil, marine, offshore and industrial applications.
• NOFIRNO® Rapid Duct Seal Fast-install, high-performance duct sealing system designed for speed-critical or restricted-access environments, offering reliable water and gastight protection with full re-entry capability.
• NOFIRNO® Flexible Pipe Penetration Seals Versatile, certified system for metallic, GRP and plastic-coated pipes, providing up to four hours' fire resistance alongside watertight and gastight performance. Flexible and re-enterable for long-term durability.
• NOFIRNO® Plastic Pipe Penetration System Sealing system specifically designed for plastic pipes, providing certified fire and smoke protection while maintaining sealing performance as pipes soften or melt under heat. For civil, industrial and commercial projects.
• FYLLOFOAM® Fire Protection Lightweight, flexible foam-based sealing solution for grouped cables in walls, floors and bulkheads. Provides fire-rated protection while simplifying installation in irregular spaces. Certified to EN 13501-1 and EN 13501-2 with ratings up to EI-240.
• ACTIFOAM® Fire Protection Next-generation intumescent fire protection system for sealing grouped cables through walls, floors and bulkheads. Expands under heat to fill voids and maintain compartment integrity as cables burn away. Provides up to 2 hours fire resistance.
• FYLLOFYS® Fire Board Waterproof, lightweight fireboard system providing up to two hours of certified fire resistance. Combines fire stopping performance with water resistance, for damp environments, transport hubs, and marine applications.
• GlandMod® Multi-Gland System Modular gland system allowing multiple cables to pass through a single entry point with individual sealing for each. Reduces installation time while maintaining fire, water and gas protection.
• SLIPSIL® Sealing Plugs Maintenance-free, tool-less installation sealing plugs for single or trefoil cable and pipe penetrations. Provides gas and watertight seal that remains fully re-enterable without mechanical fixings.
• Multi-cable Transit Frames – Marine Specialist transit frames developed for marine and offshore installations. Built to withstand vibration, pressure and harsh conditions while ensuring compatibility with NOFIRNO and RISE sealing systems.
• Bolt Through Glands Compact, bolt-through gland systems providing a space-saving alternative to full transit frames. Certified for fire, water and gas protection where space or weight is at a premium.
• Frames and Conduit Systems Robust steel frames and conduit systems designed to house CSD sealing solutions. Available in multiple configurations to suit round, square or rectangular penetrations, with proven fire and watertight performance.
• Installation Services Expert installation by trained specialists ensuring compliant, high-performance sealing across all penetrations. Includes site surveys, inspection, and remediation planning.
• Training Services Hands-on training programmes for installer and supervisor certification, covering preparation, installation, quality checks, and inspection. Delivered on-site or at training facilities.
• Product Supply & Logistics Managed logistics including phased deliveries, call-off scheduling, global export support, quality documentation, certification, and batch tracking, matched to project cable/pipe schedules.

Quantifiable outcome

• 3,000+ naval projects completed including entire UK fleet (QEC Aircraft Carriers, Type 45, Type 26)
• +7 more outcomes

Named customers15 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature8 records

Scale indicators8 records

Recent moves6 records

Expansion highlights6 records

Regional players

• WT Henley (HellermannTyton): Cable management and sealing specialist with strong UK and European heritage serving utilities and rail. Comparable in target end markets (UK power, rail, infrastructure) though broader on cable accessories than on penetration sealing specifically.

Broad incumbents

• Hempel: Global coatings and sealing solutions provider serving marine, offshore oil and gas, and infrastructure. While primarily coatings-focused, its marine fire and protective systems overlap with CSD's naval and offshore sealing portfolio.
• Nelson Firestop (Emerson): Emerson-owned firestop products brand for through-penetration sealing in commercial, industrial, and utility environments. Competes with CSD's FYLLOFOAM and ACTIFOAM ranges in building and infrastructure fire-stopping applications.
• 3M: Diversified industrial conglomerate offering firestop and sealing products through its Safety & Industrial segment. Overlaps with CSD in cable transit and fire protection for buildings and infrastructure, but as part of a much larger portfolio.
• Hilti: Global construction tools and firestop systems provider with a broad portfolio including cable and pipe penetration seals. Competes with CSD in built environment and infrastructure fire-stopping, but operates across a much wider product range and geographic footprint.

Direct peers

• Beele Engineering: Dutch manufacturer of NOFIRNO and related sealing systems and CSD's principal product partner/distributor relationship for international enquiries. Effectively the product originator behind much of CSD's portfolio and a direct competitor/partner in non-UK markets.
• Roxtec: Swedish-founded global leader in cable and pipe penetration seals with modular systems for marine, power, and infrastructure. Closest direct competitor to CSD's NOFIRNO multi-cable transit portfolio, with overlapping certifications and customer base in shipbuilding, offshore, and utilities.
• MCT Brattberg: Swedish manufacturer of multi-cable transit frames and seals for marine, offshore, and industrial applications. Direct competitor to CSD's transit frames and RISE/NOFIRNO transit systems with overlapping certifications (EN 1366-3, EI ratings).

Others

• Prysmian Group: Global cable manufacturer with complementary fire-resistant and marine cable systems. Not a direct seal competitor, but adjacent in the same naval, offshore, and infrastructure specification ecosystem.

Emerging players

• Specified Technologies (STI): US-based specialist in firestop systems for through-penetrations in buildings and infrastructure. Comparable in product scope (cable and pipe penetration seals) but with primary focus on the North American built environment rather than UK marine/power markets.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/csdsealing
• Facebookfacebook.com/csdsealing
• LinkedInlinkedin.com/company/csd-sealing-systems

Compliance7 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 CSD Sealing Systems