FSI
FSi Promat is a UK-based manufacturer of passive fire protection products — including intumescent sealants, collars, wraps, coatings, mortars, and open-state cavity barriers — serving architects, contractors, and developers through its own Firesafe & Sound distribution network.
- Company typePrivate
- Founded2000
- HeadquartersMeasham, United Kingdom
- Headcount51–100
- GTM typeB2B
- OfferingHardware or Manufacturing
What FSI does
FSi Limited, trading as FSi Promat, is a UK-based manufacturer of passive fire protection products and a wholly-owned subsidiary of Belgian building materials conglomerate Etex N.V. Founded in 2000 and headquartered in Measham, Leicestershire, the company operates from a manufacturing site in Measham and a distribution centre, Firesafe & Sound, in Grays, Essex. It self-describes as the UK's largest manufacturer of passive fire protection products, employing 51-100 people and offering a portfolio of more than 20 SKUs across penetration seals, linear gap seals, and cavity barriers.
The core technology is built on proprietary intumescent and ablative material formulations, mineral wool composites, and reactive fire-stopping devices tested to EN 1366-3, EN 1366-4, EN 13501-1, and EN 13501-2 standards. Products are manufactured under ISO 9001:2015 procedures and carry UKCA, CE, UL-EU, and IFC third-party certifications, with key brands including Pyrocoustic, Pyrolastic, PYROPRO, Stopseal, Silverliner (including the OSCB open-state cavity barrier range), PipeBloc, Silverseal, Flexi-Coat, NS Putty, S-Line, Pass-It, and Paraflam. In October 2023, the company consolidated sister brand Promat's UK fire-stopping portfolio under the FSi Promat brand, combining 88 years of experience across the two legacy brands.
Revenue is generated through direct hardware sales of fire-stopping and cavity-barrier products to architects, contractors, installers, facade contractors, and developers, supplemented by technical consultancy and specification services. Distribution is handled through the wholly-owned Firesafe & Sound logistics centre with next-day UK and same-day London delivery, plus channel-partner distributors in Ireland, the UAE, and the Netherlands. Pricing is quote-based and not publicly disclosed. The company targets early-stage specification via RIBA-accredited CPDs, ASFP seminars, a Product Selector App, and 2024-launched specification packs and online product training.
FSI firmographics
Firmographics- Name
- FSI
- Legal name
- FSi Limited
- Website
- https://fsiltd.com
- Company type
- Private
- Founded year
- 2000
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Short description
- FSi Promat is a UK-based manufacturer of passive fire protection products — including intumescent sealants, collars, wraps, coatings, mortars, and open-state cavity barriers — serving architects, contractors, and developers through its own Firesafe & Sound distribution network.
- Ownership category
- akta.pro rank
FSI industry classification
Industry- Product category
- Passive Fire Protection Products
- SIC
- Chemicals & Allied Products (2800)
- akta.pro primary industry
- Firestopping & Fire-Resistant Sealants (IMADAOAI)
- akta.pro secondary industries
- Fireproofing & Intumescent Coatings (IMAIAKAH), Firestop & Penetration Sealing Materials (IMADAGAL)
Keywords
Where FSI is headquartered
LocationHeadquarters
- HQ city
- Measham
- HQ country
- United Kingdom
- HQ region
- Europe
Offices2 records
Markets served
FSI business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Personnel, Supply Chain, Operations, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- Passive Fire Protection Products: Manufacture and sale of fire stopping products including sealants, batts, collars, wraps, pillows, coatings, and cavity barriers for the construction industry. Products are sold directly through Firesafe & Sound distribution center and through channel partner distributors.
- Technical Support and Specification Services: Technical consultancy services including system consultancy, installation guidance, and specification pack support for architects and fire engineers.
Go-to-market motion1 record
Distribution channels2 records
Marketing channels6 records
FSI product offering
Product offeringCore offering
FSi Promat manufactures passive fire protection products including fire stopping sealants, intumescent pipe collars and wraps, mineral wool batts and coatings, gypsum-based mortars, fire pillows, and open state cavity barriers for the construction industry. Products reinstate fire resistance of wall and floor constructions where joints and service penetrations exist, and protect building envelope voids in ventilated facades. The company manufactures in-house to ISO 9001:2015 standards, tests products to EN 1366-3, EN 1366-4, EN 13501-1, and EN 13501-2, and distributes through its Firesafe & Sound logistics centre offering next-day UK delivery.
Product overview
FSi Promat is a manufacturer of passive fire protection products, operating as part of the Etex Group. The company produces a comprehensive portfolio of fire stopping and cavity barrier systems for the construction industry. The product range is organized into three main categories: Penetration Seals (including sealants, coatings, coll ... raps, pillows, mortars), Linear Gap Seals (sealants for joints), and Cavity Barriers (for ventilated facades and external envelope protection). Core penetration seal products include Pyrocoustic® Sealant, Pyrolastic® Silicone, PYROSEAL 2K, PYROPRO® HPE, Pyropro® LST, Stopseal® Batt, Stopseal® Ablative Spray Coating, PS Coating, and Pyrocoustic® Trowel Grade. Pipe protection is provided through PipeBloc® PCP (collar), PipeBloc® EL (wrap on roll), and PipeBloc® PWP (wrap). Additional sealing solutions include NS Putty®, NS Putty® Pads, PenoPatch, S-Line® Pillows, Silverseal® HS Compound, Silverseal® Compound, and Pass-It® Transit. Cavity barriers include Silverliner® Open State Cavity Barrier (OSCB) and Paraflam® SEB, with Flexi-Coat® Coating offering flexible movement accommodation. Products are tested to EN and ISO standards, carry CE and UKCA marking, and are supported by the Firesafe & Sound distribution center offering next-day UK delivery.
Differentiator
Problem solved
Functional benefit
Products and services
- Pyrocoustic Sealant
Quantifiable outcome
- Water waste reduction of 550,000 liters per year through wastewater treatment system
- +2 more outcomes
Companies that use FSI
Customer profileNamed customers1 record
Segments4 records
Ideal customer profiles3 records
FSI technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature5 records
FSI partnerships and signals
Strategic signalPartnerships
Seven partnerships are on record, tiered core, major and minor.
- Firesafe & Sound LtdcoreFiresafe & Sound (FSS) is the distribution center and logistics team behind FSi Limited. Part of FSi Promat since 2000, FSS handles all customer service, order fulfillment, and delivery operations including next day UK delivery and same day London delivery.
- IFC CertificationmajorPartnership with IFC Certification to provide third-party certification for Silverliner OSCB products. This certification strengthens market position and provides independent verification of product performance and quality.
- PromatcorePromat and FSi have combined under the FSi Promat brand. Promat specializes in protective board solutions while FSi Promat handles fire stopping and cavity barriers. Both are part of Etex Group with 88 years combined experience.
- Tennants (Ireland)minorIrish distributor for FSi Promat fire stopping products in the Republic of Ireland.
- MHI (UAE)minorUAE-based distributor for FSi Promat fire stopping products in the Middle East.
- DFI Trading (Netherlands)minorDutch distributor for FSi Promat fire stopping products in the Netherlands.
- RIBA (Royal Institute of British Architects)majorPartnership to deliver RIBA-accredited CPD courses for architects on passive fire protection, raising awareness of legislation and product types.
Scale indicators7 records
Recent moves7 records
Expansion highlights5 records
FSI competitors and assessment
Company assessmentDirect peers
- Nullifire: Nullifire (Tremco CPG) is a leading UK-based manufacturer of intumescent firestopping sealants, coatings, and cavity barriers. Direct head-to-head competitor to FSi Promat across the same product categories, customer base (architects, contractors), and UK distribution model.
- Specified Technologies Inc (STI Firestop): STI is a US-headquartered specialist manufacturer of firestopping systems including sleeves, collars, wraps, and sealants. Comparable in product depth to FSi Promat, though with stronger North American presence. Direct product category overlap in penetration seals and intumescent technologies.
Broad incumbents
- Hilti: Hilti is a global construction product manufacturer with a substantial firestop product line, including sealants, collars, wraps, and modular transit systems. It directly competes with FSi Promat at the contractor and installer level, with particular strength in Pass-It Transit and PipeBloc-style solutions.
- Knauf: Knauf is a global manufacturer of drywall, insulation, and firestopping systems. Comparable to FSi Promat in combining fire protection products with broader construction materials, though Knauf's portfolio is significantly wider and includes the structural assemblies within which FSi's products are installed.
- Sika: Sika is a global specialty chemicals company with a construction sealants and firestopping product line. Its Sikaflex and Sika firestop products compete directly with FSi's Pyrocoustic, Pyrolastic, and PyroPro lines in penetration and linear gap seal applications.
- Würth: Würth is a global construction and industrial supplier with a firestopping product line including sealants, collars, and cavity barriers. Competes with FSi Promat at the contractor and installer level, leveraging its vast distribution network and tradesperson relationships.
- Rockwool: Rockwool is a global manufacturer of stone wool insulation and fire protection products, including firestopping and fire-rated cavity barriers. It competes with FSi in penetration and cavity barrier applications, particularly for stone wool-based products like Stopseal Batt and Silverliner core.
- BASF (MasterSeal / MasterFire): BASF's Master Builders Solutions brand offers MasterSeal and MasterFire firestopping products, including sealants, mortars, and intumescent systems. A broad incumbent chemical company competing with FSi Promat in chemical-based firestopping products, particularly in larger commercial construction projects.
- 3M Fire Protection: 3M manufactures a broad range of firestopping products including intumescent wraps, sealants, and putty products under the FireDam brand. A broader incumbent competing against FSi Promat in penetration seal applications, particularly in larger commercial and institutional projects.
Others
- Promat: Promat is FSi's sister brand within Etex Group, specializing in fire protective boards and high-temperature insulation. Following the 2023 FSi-Promat UK rebrand, Promat UK fire stopping products were transferred to FSi Promat, making them a directly aligned sibling brand rather than independent competitor.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
FSI social profiles
Digital presenceFSI compliance and trust
Trust signalCompliance6 records
FSI financial estimates
Financial estimateRevenue estimate
Valuation estimate
FSI leadership team
Management profileNumber of profiles
Profiles9 records
FSI subsidiaries and ownership
Company hierarchySubsidiaries1 record
FSI funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
FSI M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about FSI
What does FSI do?
FSi Promat manufactures passive fire protection products including fire stopping sealants, intumescent pipe collars and wraps, mineral wool batts and coatings, gypsum-based mortars, fire pillows, and open state cavity barriers for the construction industry. Products reinstate fire resistance of wall and floor constructions where joints and service penetrations exist, and protect building envelope voids in ventilated facades. The company manufactures in-house to ISO 9001:2015 standards, tests products to EN 1366-3, EN 1366-4, EN 13501-1, and EN 13501-2, and distributes through its Firesafe & Sound logistics centre offering next-day UK delivery.
Is FSI a public or private company?
FSI is a private company. It is classified as corporate owned and is currently operating.
When was FSI founded?
FSI was founded in 2000. It employs 51 to 100 people.
Where is FSI based?
FSI is headquartered in Measham, United Kingdom, in the Europe region.
How does FSI make money?
Two revenue lines are on record. Passive Fire Protection Products are the primary driver. The others are technical Support and Specification Services.
Who are FSI's main competitors?
Direct peers on record are Nullifire and Specified Technologies Inc (STI Firestop). Broad incumbents are Hilti, Knauf, Sika, Würth, Rockwool, BASF (MasterSeal / MasterFire) and 3M Fire Protection. Promat is listed as an others.
Does FSI have an API?
No public API is recorded for FSI.
What industry is FSI in?
FSI's product category is Passive Fire Protection Products. Its primary akta.pro industry code is IMADAOAI, Firestopping & Fire-Resistant Sealants, with a secondary code of IMAIAKAH, Fireproofing & Intumescent Coatings. Its SIC code is 2800.