Sealmaster of Cambridge
Sealmaster of Cambridge manufactures intumescent fire seals, acoustic seals, draught and weather seals, and structural fire protection products as a division of Dixon International Group Limited. The company sells primarily to UK architects, contractors, and fire door manufacturers through direct sales and the NBS specification platform.
- Company typePrivate
- Founded1964
- HeadquartersCambridge, United States
- Headcount1–10
- GTM typeB2B
- OfferingHardware or Manufacturing
What Sealmaster of Cambridge does
Sealmaster of Cambridge is a UK-based manufacturer of architectural seals and passive fire protection products, operating as a division of Dixon International Group Limited since its founding in 1964. The company produces intumescent fire and smoke seals, acoustic seals, draught and weather seals, fire glazing systems, ironmongery protection, and structural fire seals, organized across 10 product categories with 96+ SKUs. Core technology centers on graphite-based intumescent materials, elastomeric compounds, and aluminium carrier systems with silicone and neoprene inserts, validated through multiple third-party fire certifications (Certifire CF462, CF5597, CF5645, CF5387, CF5428, CF221) and compliance with BS 476 Part 22, BS EN 1634-1, BS EN 1363-1, and EN ISO 10140-2 standards. Products deliver up to 4 hours of fire resistance, up to 40dB acoustic attenuation, cold smoke leakage below 3m³/m/hr, and 1 million operational cycle durability.
The business operates a sales-led, direct-to-specifier go-to-market model, primarily via phone (01223 832851) and email ([email protected], [email protected]), supplemented by an NBS specification platform listing, channel partnership with Firewise Supplies, and co-development relationships with major UK fire door manufacturers including Deanta, Metflam, Halspan, and Mann McGowan. Revenue is generated through one-time product sales to architects, contractors, fire door OEMs, and building owners, with trade account terms of 30 days payment and free UK mainland carriage on orders above £1,250. Marquee project references include The Shard, Burj Khalifa, BBC Studios, English Heritage, the British Antarctic Survey, and recognition from the Building Research Establishment, positioning Sealmaster as an established, heritage brand in the UK construction seal market. Geographic reach is primarily domestic UK, with international exposure driven by specifier-led showcase projects rather than dedicated overseas distribution infrastructure.
Sealmaster of Cambridge firmographics
Firmographics- Name
- Sealmaster of Cambridge
- Legal name
- Dixon International Group Limited
- Website
- https://sealmaster.co.uk
- Company type
- Private
- Founded year
- 1964
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- Sealmaster of Cambridge manufactures intumescent fire seals, acoustic seals, draught and weather seals, and structural fire protection products as a division of Dixon International Group Limited. The company sells primarily to UK architects, contractors, and fire door manufacturers through direct sales and the NBS specification platform.
- Ownership category
- akta.pro rank
Sealmaster of Cambridge industry classification
Industry- Product category
- Architectural Seal Manufacturing
- NAICS
- Gasket, Packing, and Sealing Device Manufacturing (339991)
- SIC
- Adhesives & Sealants (2891), Gaskets, Packg & Sealg Devices & Rubber & Plastics Hose (3050)
- akta.pro primary industry
- Firestopping & Fire-Resistant Sealants (IMADAOAI)
- akta.pro secondary industries
- Sealants (Construction & Industrial) (IMAEAGAI), Sealants, Expansion Joints & Weatherproofing (Caulking, Joint Systems) (IMAFAMAF), Seals, Gaskets & O-Rings (Industrial Elastomer) (IMANALAC)
Keywords
Where Sealmaster of Cambridge is headquartered
LocationHeadquarters
- HQ city
- Cambridge
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
Sealmaster of Cambridge business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Personnel, Operations, Technology or R&D, Marketing or Sales
Revenue model
- Seal Products Sales: Direct sales of manufactured sealing products including intumescent fire seals, smoke seals, acoustic seals, draught and weather seals, fire glazing products, and structural fire seals. Products sold directly to architects, specifiers, contractors, and through stockists like Firewise Supplies.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Monthly | Trade Account Terms |
Go-to-market motion2 records
Distribution channels4 records
Marketing channels6 records
Sealmaster of Cambridge product offering
Product offeringCore offering
Sealmaster of Cambridge manufactures architectural seals for the building industry, including intumescent fire and smoke seals, acoustic seals, draught and weather seals, fire glazing products, and structural fire safety solutions. The company produces over 96 products across 10 categories using materials such as aluminium, high-grade silicone, graphite, neoprene, and elastomeric compounds, offering fire resistance from 30 minutes to 4 hours and acoustic performance up to 40dB. Products are sold to architects, contractors, and fire door manufacturers, with bespoke sizing and colour options available.
Product overview
Sealmaster of Cambridge is a division of Dixon International Group Limited, manufacturing a comprehensive range of architectural seals and fire protection products for buildings. The product portfolio includes ten core categories: Acoustic Seals (15 products including Delta, Double Fin, DuxBak, DropSeal, and weather seal products), Door Edge Seals (8 products including graphite intumescent strips), Door Stop & Window Seals (10 products including Tempest), Rubber Door Seals & Inserts (52 products including Blizzard, Cyclone, Deluge, Hurricane, SmartSeal, Thunder, and Typhoon series), Fire Glazing Seals (12 products including FireGlaze tapes and compounds, glazing tapes), Ironmongery Protection (3 products including Masterseal and Intumescent Plugs), Protect a Door (4 products including door frame guards, hinges, finger protectors), Structural Fire Seals (4 products including FireFoam, FireWrap, FireClose, Cavity Fire Seal), Threshold Seals (7 products including Vortex, SmartSeal, Thunder), and Upgrading Solutions (3 products including FireFace). Products serve architectural and commercial construction applications requiring energy efficiency, water-tightness, acoustic performance, and smoke and fire safety in buildings.
Differentiator
Problem solved
Functional benefit
Products and services
- Intumescent Fire Door Seals (IF30, IF60)
Quantifiable outcome
- Up to 40dB acoustic performance (EN ISO 10140-2)
- +4 more outcomes
Companies that use Sealmaster of Cambridge
Customer profileNamed customers7 records
Segments4 records
Ideal customer profiles1 record
Sealmaster of Cambridge technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature5 records
Sealmaster of Cambridge partnerships and signals
Strategic signalPartnerships
Six partnerships are on record, tiered core and minor.
- DeantacoreDoor manufacturer partnership for ongoing collaboration on intumescent sealing products. Meetings held to maintain optimum partnerships for all parties involved.
- MetflamcoreMetals and flame product manufacturer partnership for collaboration on intumescent products. Regular meetings to stay updated and optimize partnership outcomes.
- HalspancoreFire door manufacturer partnership for ongoing collaboration on sealing solutions. Regular meetings held to ensure optimum partnership relationships.
- Mann McGowancorePartnership with Mann McGowan for collaboration on intumescent and fire sealing products. Regular meetings to maintain effective working relationships.
- Firewise SuppliesminorStockist for Sealmaster products. Customers can purchase products through Firewise Supplies website including DropSeal, Vortex threshold seals, and various rubber door seals.
- ISL (Intumescent Seals Ltd)coreRelated division within Dixon International Group offering comprehensive range of intumescent seals for fire safety. Products recognized by leading fire door and glazed screen manufacturers in UK and internationally.
Scale indicators3 records
Recent moves5 records
Expansion highlights5 records
Sealmaster of Cambridge competitors and assessment
Company assessmentBroad incumbents
- Hilti: Global construction tools and firestop systems manufacturer; competes with Sealmaster in firestopping (pipe collars, wraps, foam) at much larger scale and broader geographic reach.
- 3M: Diversified global manufacturer with firestopping products (e.g., Fire Barrier, FB-3000 WT) overlapping with Sealmaster's structural fire seal and fire glazing categories as part of a much broader portfolio.
- Promat (Etex): Passive fire protection specialist within the Etex group, offering fire-rated boards, glazing and seal systems for buildings — broader portfolio than Sealmaster but overlapping in intumescent and fire-rated glazing categories.
- Tremco (RPM International): Established construction sealants and weatherproofing manufacturer with broader product portfolio and global distribution; overlaps with Sealmaster in weatherproofing and acoustic/draught seal categories but at much larger scale.
Direct peers
- Mann McGowan: UK manufacturer of intumescent and fire seals for doors and glazing; while listed as a Sealmaster partner, it also competes in overlapping intumescent seal SKUs for fire-door and firestop applications.
- Pyroplex: UK manufacturer of intumescent fire seals and fire-rated glazing seals supplying fire-door OEMs and contractors; competes head-to-head with Sealmaster in fire-door edge seals and Certifire-approved product categories.
- Hodgson Sealants: UK-based manufacturer of sealants and glazing tapes including fire-rated variants; competes with Sealmaster in fire-rated glazing tapes and sealant categories serving door and window manufacturers.
- Lorient: UK-based specialist in intumescent fire seals, smoke seals, and acoustic seals for fire-rated doorsets — the most direct competitor to Sealmaster in intumescent door seal technology and Certifire-certified fire protection.
- Tenmat: UK manufacturer specializing in fire protection materials including intumescent seals, fire-rated glazing components and firestop products — closely comparable to Sealmaster's fire seal and structural fire seal ranges.
- Norseal (Trelleborg): Industrial elastomer seal manufacturer (now part of Trelleborg) producing rubber gaskets and sealing devices for construction and industrial applications — directly comparable to Sealmaster's rubber door seal and elastomer insert ranges.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks6 records
Key highlights7 records
Customer concentration
Sealmaster of Cambridge social profiles
Digital presenceSealmaster of Cambridge compliance and trust
Trust signalCompliance12 records
Sealmaster of Cambridge financial estimates
Financial estimateRevenue estimate
Valuation estimate
Sealmaster of Cambridge leadership team
Management profileNumber of profiles
Sealmaster of Cambridge subsidiaries and ownership
Company hierarchySubsidiaries1 record
Sealmaster of Cambridge funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Sealmaster of Cambridge 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 Sealmaster of Cambridge
What does Sealmaster of Cambridge do?
Sealmaster of Cambridge manufactures architectural seals for the building industry, including intumescent fire and smoke seals, acoustic seals, draught and weather seals, fire glazing products, and structural fire safety solutions. The company produces over 96 products across 10 categories using materials such as aluminium, high-grade silicone, graphite, neoprene, and elastomeric compounds, offering fire resistance from 30 minutes to 4 hours and acoustic performance up to 40dB. Products are sold to architects, contractors, and fire door manufacturers, with bespoke sizing and colour options available.
Is Sealmaster of Cambridge a public or private company?
Sealmaster of Cambridge is a private company. It is classified as corporate owned and is currently operating.
When was Sealmaster of Cambridge founded?
Sealmaster of Cambridge was founded in 1964. It employs 1 to 10 people.
Where is Sealmaster of Cambridge based?
Sealmaster of Cambridge is headquartered in Cambridge, United States, in the North America region.
How does Sealmaster of Cambridge make money?
One revenue line is on record: seal Products Sales.
Who are Sealmaster of Cambridge's main competitors?
Broad incumbents on record are Hilti, 3M, Promat (Etex) and Tremco (RPM International). Direct peers are Mann McGowan, Pyroplex, Hodgson Sealants, Lorient, Tenmat and Norseal (Trelleborg).
Does Sealmaster of Cambridge have an API?
No public API is recorded for Sealmaster of Cambridge.
What industry is Sealmaster of Cambridge in?
Sealmaster of Cambridge's product category is Architectural Seal Manufacturing. Its primary akta.pro industry code is IMADAOAI, Firestopping & Fire-Resistant Sealants, with a secondary code of IMAEAGAI, Sealants (Construction & Industrial). Its NAICS code is 339991 and its SIC code is 2891.