What Pyroplex does

Pyroplex Ltd is a UK-based manufacturer of passive fire protection products, operating as a core subsidiary of the privately held Reddiplex Group. Founded in 1989 and headquartered in Droitwich, Worcestershire on a 30,000m² manufacturing site, the company produces intumescent strips, fire door seals, glazing seals, pipe collars, pipe wraps, fire-rated sealants and foams, air transfer grilles, and acoustic seals (the latter marketed under the Harmony sub-brand), all based on a proprietary graphite-based intumescent compound manufactured in-house since 2014. The compound is protected by a European Patent (1996) and a Worldwide Patent (1997), and is engineered to expand up to 25:1 by volume when exposed to temperatures above 180°C, providing fire resistance ratings of 30 to 240 minutes depending on application.

Pyroplex serves the construction industry across both commercial and residential buildings, with end applications spanning fire doorsets, service penetrations (pipes, cables), glazing apertures, and linear gap joints. Revenue is generated through one-time product sales distributed via a global channel of authorised distributors and stockists, complemented by direct export operations and wholly-owned regional offices in Hong Kong (Reddiplex Asia, operating for 30 years) and Spain (Pyroplex Iberica). Products carry extensive third-party certifications including Certifire, IFC, CE Marking, multiple European Technical Assessments, ISO 9001 and ISO 14001, as well as regional approvals (PSB Singapore, UL EC), which function as the primary regulatory barrier to entry in specification-driven construction markets. Pyroplex also offers custom profile design and bespoke extrusion services (single, co-extrusion, and triplex) for major project requirements, leveraging in-house tooling and an on-site indicative fire testing furnace for ongoing product development.

The company employs 101-250 people and is led by Group Managing Director Neil Dallamore (appointed February 2019). Most recent disclosed corporate activity is the parent Reddiplex Group's March 2025 acquisition of Veker Extrusions & Gaskets Ltd, indicating continued inorganic expansion of the group's sealing and extrusion capabilities, of which Pyroplex is the fire-protection-focused operating arm.

Name

Pyroplex

Legal name

Pyroplex Ltd

Website

https://pyroplex.com

Company type

Private

Founded year

1989

Operating status

Operating

Headcount range

101–250 employees

Short description

Pyroplex is a UK-based manufacturer of passive fire protection products, including intumescent strips, fire collars, and sealants, serving the global commercial and residential construction industry via distributors and direct export offices in Hong Kong and Spain.

Ownership category

akta.pro rank

Headquarters

HQ city

Worcester

HQ country

United Kingdom

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Passive Fire Protection Products: Pyroplex generates revenue through the manufacture and sale of passive fire protection products including intumescent strips, fire door seals, fire collars, pipe wraps, sealants, foams, glazing seals, air transfer grilles, and acoustic seals. Products are sold through a global distributor network as well as direct export. Revenue is generated through one-time product sales, with no subscription component.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels6 records

Core offering

Pyroplex is a UK-based manufacturer of passive fire protection products, designing and producing intumescent fire door seals, fire glazing seals, CE-marked pipe collars and pipe wraps, intumescent and silicone sealants, fire-rated PU foam, air transfer grilles, mineral fibre sheets, and acoustic seals for the construction industry. All products are built around Pyroplex's proprietary graphite-based intumescent compound, which is compounded in-house and extruded at its Droitwich facility, and are supplied through a global distributor and direct export network.

Product overview

Pyroplex is a UK-based manufacturer specializing in passive fire protection products for over 30 years, operating as part of the Reddiplex Group. The product portfolio comprises two main categories: Fire Sealing products (intumescent strips with various configurations including brush pile, pile with fin, and flipper technology; flexible door strips; Eurostrip; and glazing seals for 30 and 60-minute applications) and Fire Stopping products (CE marked pipe collars in 200 and 400 series; CE marked pipe wraps; and associated sealants including intumescent acrylic, silicone, and PU foam). Supporting products include mineral fibre sheets, air transfer grilles, acoustic seals under the Harmony brand, and custom seal design services. All products utilize Pyroplex's proprietary graphite-based intumescent compound manufactured in-house at their UK facility.

Differentiator

Problem solved

Functional benefit

Brands

• Harmony: Acoustic seals brand providing perimeter and threshold sealing solutions for doors
• Eurostrip

Products and services

• Intumescent Strips (Fire Only) Traditional fire-only intumescent seals for fire rated timber door edges and frames, suitable for rebates in single and double action doors, available in 2.1m lengths with self-adhesive backing and multiple colours. Targeted at fire door manufacturers and installers needing code-compliant fire seals.
• Intumescent Strips with Brush Pile Fire, smoke, and acoustic seals with brush pile technology for timber door edges and frames, providing combined intumescent and smoke sealing performance for fire door manufacturers and contractors.
• Intumescent Strips with Pile and Fin Fire, smoke, and acoustic seals with pile and centre fin for timber door edges and frames, providing combined fire, smoke, and acoustic sealing performance.
• Thermally Fused Flipper Intumescent Strips (Single/Twin/Triple/Side Flipper) Rigid box intumescent strips with thermally fused flipper technology providing tamper-resistant, durable fire, smoke, and acoustic sealing for fire door edges and frames, for use by fire door manufacturers and specifiers.
• Intumescent Door Strip Basic intumescent seal for fire rated metal and timber door leaves and frames, also suitable for gap filling in suspended floors, soffits, and ducting. Aimed at contractors and door installers.
• Flexible Door Strips Permanent intumescent seals for fire rated timber and metal door edges and frames, supplied in continuous coils with coloured polymer cover for high-volume door manufacturers.
• Eurostrip Economical intumescent sealing solution for high-volume steel doorset manufacturers, expanding up to 20 times its original volume when exposed to heat.
• Fire Glazing Seals (30-Minute) Intumescent glazing seals (U-Channel, with Fin, without Fin, Low Sightline, Glazing Strip) for 30-minute fire protection of glazed apertures in fire doors, available in multiple profiles and colours.
• PFG1HR 60-Minute Fire Glazing System Three-part 60-minute fire glazing seal system with integral fins accommodating tolerance variations in glass and door cores, for fire door and partition manufacturers.
• 200 Series Slimline Pipe Collar CE marked slimline pipe collars for sealing plastic flammable pipes (50-160mm diameter) in walls and floors, providing up to 120 minutes fire resistance for contractors and MEP installers.
• 200 Series Pipe Collar CE marked fire collars for plastic pipe penetrations (55-160mm diameter) in concrete and masonry partitions, providing up to 120 minutes fire resistance.
• 400 Series Pipe Collar Heavy-duty CE marked pipe collars for large diameter pipes (25-400mm), offering up to 240 minutes fire resistance with a stainless steel casing.
• CE Marked Pipe Wraps (200 & 400 Series) CE marked fire wraps for sealing pipe penetrations through walls and floors, available in 2-hour and 4-hour fire ratings for service penetration contractors.
• Intumescent Acrylic Sealant One-part halogen-free intumescent sealant for linear gap joints and movement joints, providing up to 240 minutes fire resistance for construction joint sealing applications.
• CE Intumescent Acrylic Sealant CE marked intumescent sealant for linear joints and penetration seals, providing up to 240 minutes fire resistance with an extended shelf life, for European construction projects.
• Fire Rated PU Foam Flame retardant polyurethane expanding foam for cavity gap sealing around doors, window frames, and service penetrations, providing up to 120 minutes fire resistance (Certifire CF828).
• Fire Rated Silicone Sealant One-part neutral cure silicone sealant for construction joints and pipe penetrations, fire rated up to 4 hours with UV and temperature resistance for exterior or interior applications.
• Pressure Exerting Sealant Multi-directional expanding sealant for cable tray and pipe penetrations, providing up to 240 minutes fire resistance (IFCC1029).
• Putty Pads Pre-cut ablative pads for reinstating fire performance of compartment walls penetrated by electrical outlets, providing up to 120 minutes fire resistance.
• Mineral Fibre Sheet Intumescent sheet for fire resistant door assemblies and electrical protection, expanding up to 20:1 volume ratio when exposed to elevated temperatures.
• Air Transfer Grilles Intumescent grilles allowing air circulation through fire resisting doorsets while providing a fire barrier when exposed to heat, providing up to 60 minutes fire resistance (IFCC1001).
• Harmony Acoustic Seals Perimeter and threshold acoustic seals under the Harmony sub-brand, including corner seals, twin fin seals, and drop-down door seals, for restricting noise, smoke, and air passage in commercial and residential buildings.
• Custom Seals Bespoke intumescent seal profile design and manufacturing service, ranging from single material extrusions through to co-extrusion and triplex extrusion, with in-line finishing options, for major projects requiring non-standard profiles.

Quantifiable outcome

• Expansion ratio of 25:1 by volume for perimeter applications and 10:1 by volume for glazing applications
• +2 more outcomes

Segments2 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Twelve partnerships are on record, tiered core and minor.

• Reddiplex Asia LimitedcoreChannel Partner/ Reseller/ DistributorReddiplex Asia Limited operates as the Asia Pacific regional hub for Pyroplex products from their office at J2, 8/F, MG Tower, 133 Hoi Bun Road, Kwun Tong, Kowloon, Hong Kong. The office has been servicing Asia Pacific customers directly for 30 years, providing local sales, technical support, and product distribution with local warehouse for fast servicing of customer requirements.
• Fire Seals DirectcoreChannel Partner/ Reseller/ DistributorUK-based authorised distributor of Pyroplex fire sealing and fire stopping products. Located at Sir Alfred Owen Way, Pontygwindy Industrial Estate, Caerphilly, CF83 3HU. Stocks and distributes the full range of Pyroplex products.
• Norseal LtdcoreChannel Partner/ Reseller/ DistributorUK-based authorised distributor of Pyroplex fire sealing and fire stopping products. Located at 5 Regents Drive, Prudhoe, Northumberland, NE42 6PX.
• Noberne Seals LtdcoreChannel Partner/ Reseller/ DistributorUK-based authorised distributor of Pyroplex fire sealing and fire stopping products. Located at Larchfield Road, Hunslet, Leeds, LS10 1QP.
• Reddiseals LtdminorChannel Partner/ Reseller/ DistributorRelated company within the Reddiplex Group, also an authorised distributor of Pyroplex fire sealing products. Located at Building 3, Ten Acres, Unit 1, Berry Hill Industrial Estate, Droitwich, Worcestershire, WR9 9BG.
• Pyroplex Iberica S.L.coreChannel Partner/ Reseller/ DistributorPyroplex subsidiary company operating in Spain. Located at C/ Boyer, 4, 28052 Madrid. Acts as both subsidiary operation and distributor for Spanish market.
• dormakaba Gulf FZEminorChannel Partner/ Reseller/ DistributorInternational door hardware and access solutions company operating as a distributor for Pyroplex products in the Middle East region. Located in Jebel Ali South, Dubai, UAE.
• Warringtonfire (Warrington Certification Limited)coreTechnology or IntegrationThird-party certification body providing Certifire certification for Pyroplex products including fire door seals, pipe collars, pipe wraps, glazing systems, and expanding foam. Conducts ongoing certification maintenance and product testing verification.
• IFC CertificationcoreTechnology or IntegrationThird-party certification body providing IFC certification for Pyroplex products including Pressure Exerting Sealant (IFCC1029), Intumescent Acrylic Sealant (IFCC1366), and Air Transfer Grilles (IFCC1001).
• ASDMA (American Steel Door Manufacturers Association)minorOthersTrade association membership providing industry networking, standards development participation, and fire door industry representation in the United States.
• IFSA (International Fire Suppression Alliance)minorOthersInternational trade association membership supporting the fire suppression and protection industry globally through education, standards, and advocacy.
• BWF Fire Door AllianceminorOthersUK trade association for fire door manufacturers and suppliers. Pyroplex holds membership supporting industry standards development and fire door best practices.

Scale indicators4 records

Recent moves6 records

Expansion highlights6 records

Broad incumbents

• Tremco CPG (illbruck brand): Tremco Construction Products Group, including the illbruck brand, offers fire-rated sealants, intumescent products, and construction sealing solutions. It competes with Pyroplex in fire-rated sealants and firestop categories as part of a much broader construction products portfolio spanning sealants, coatings, and waterproofing.
• 3M Company: 3M operates a substantial firestop products business within its Safety & Industrial segment, offering sealants, wraps, and penetration sealing solutions. As a broad industrial conglomerate, 3M is a much larger incumbent whose firestop range competes with Pyroplex in service penetration sealing globally, though firestopping is only one of many product categories for 3M.
• Würth Group: Würth is a global distributor and manufacturer of fastening, assembly, and construction consumables, including firestop products such as sealants, collars, and wraps. Its firestop range overlaps with Pyroplex's fire stopping category, though Würth operates across many thousands of product lines in construction and MRO.
• Hilti Corporation: Hilti is a global construction tools and consumables company with a meaningful firestop product line including sealants, collars, wraps, and foam. While Hilti operates broadly across fastening, tooling, and firestopping, its firestop range competes with Pyroplex in MEP penetration sealing and is a recognized incumbent in the broader fire protection specification market.

Direct peers

• Sealmaster: Sealmaster is a UK-based specialist in fire door seals and intumescent products for the construction industry. It competes directly with Pyroplex in fire-rated door seals, smoke seals, and acoustic seals, serving similar timber and metal door manufacturers with comparable certification-backed offerings.
• Bossong S.p.A. Bossong is an Italian manufacturer specializing in chemical anchors and firestop products for service penetrations, including intumescent sealants and fire collars. It overlaps with Pyroplex's fire stopping and sealant categories, particularly in European construction and MEP applications.
• Lorient Group: Lorient is a UK-based manufacturer of fire and acoustic seals for doorsets, including intumescent strips and glazing seals. It is one of Pyroplex's closest direct competitors in the UK passive fire protection market, serving the same door manufacturer and construction customer base with overlapping product ranges and certifications.
• Firetherm (TBA Protective Technologies): Firetherm, part of TBA Protective Technologies, manufactures intumescent fire protection products including fire collars, fire wraps, and fire-rated sealants. It directly overlaps with Pyroplex's fire stopping product range and serves similar UK/EU construction and MEP penetration sealing applications.
• Nicro (formerly Norsound): Nicro is a UK-based manufacturer of fire, smoke, and acoustic seals for door and glazing applications. It competes with Pyroplex in intumescent door seals and acoustic seals, serving door manufacturers and the construction industry with comparable certified product ranges.
• Zero International: Zero International is a US-based manufacturer of fire and smoke seals, intumescent strips, and acoustical seals for commercial doors. It competes with Pyroplex in the broader fire seal category with a similar focus on certified, specification-driven products for door OEMs and the construction industry.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/pyroplex-limited
• Xx.com/pyroplex

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles13 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 Pyroplex