GPB (MASTICS) LTD

What GPB (MASTICS) LTD does

GPB (Mastics) Limited is a UK private limited company, family-run since its founding in 1997 in Hailsham, East Sussex. It provides mastic joint sealing and sealant application services to commercial, residential, industrial, and civil engineering projects across the United Kingdom. It operates from two offices: its Hailsham headquarters and a second site in Coventry serving the Midlands, and it markets its services through a website (gpbmastics.co.uk) plus LinkedIn and TikTok channels. Operationally the firm relies on NVQ Level 2/3 qualified applicators and holds a stack of UK construction safety and quality accreditations - CSCS, SMAS Worksafe, CHAS, CITB, IPAF, and Association of Sealant Applicators membership - that pre-qualify it to tender on safety-gated work.

The business model is project-based trade contracting: revenue is generated by deploying small teams of sealant applicators to construction sites under contract or sub-contract arrangements with main contractors, developers, and local authorities. Pricing is per-project / per-linear-metre rather than subscription or SaaS-style; there is no disclosed framework agreement, recurring retainer, or anchor client base. No external funding, M&A, leadership changes, or product launches beyond the social media presence have been disclosed. Headcount is stated at 1-10 employees, consistent with a specialist sub-contractor rather than a scaled platform, and there is no AI, software, or data-driven component to the service offering.

Name

GPB (MASTICS) LTD

Legal name

GPB (Mastics) Limited

Website

https://gpbmastics.co.uk

Company type

Private

Founded year

1997

Operating status

Operating

Headcount range

1–10 employees

Short description

GPB (Mastics) Limited is a family-run UK mastic joint sealing and sealant application contractor, founded 1997 in Hailsham, with offices in Hailsham and Coventry, serving commercial, residential, industrial, and civil engineering projects nationwide.

Ownership category

akta.pro rank

Headquarters

HQ city

Hailsham

HQ country

United Kingdom

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Others

Distribution channels1 record

Marketing channels3 records

Core offering

GPB Mastics is a specialist UK contractor providing professional mastic and sealant application services across commercial, residential, industrial, and civil engineering construction environments. The company delivers precise, durable sealant installations for expansion joints, architectural façades, water infrastructure, house building, and remedial works, serving contractors, developers, and local authorities nationwide from offices in Hailsham and Coventry.

Product overview

GPB (MASTICS) LTD is a specialist service company offering professional mastic and sealant application services across multiple sectors. The company operates as a single unified service offering with distinct specializations covering Civil Engineering (expansion joints, bridge and sea defences, roads and pathways), Remedial Works (concrete and brickwork resealing), Extrusion Pump applications, House Building, Glass to Glass façade joints, and Water Industries. The services are delivered by trained CSCS-certified staff with NVQ Level 2 or Level 3 qualifications, and the company holds accreditations including SMAS Worksafe Contractor and CHAS membership.

Differentiator

Problem solved

Functional benefit

Products and services

• Mastic Joint Sealing Services

Segments6 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Five partnerships are on record, tiered core and minor.

• SMAScoreStrategic or Co-development PartnerSMAS Worksafe Contractor registration demonstrates health and safety compliance and industry recognition as a qualified sealant applicator.
• CITBminorStrategic or Co-development PartnerCITB (Construction Industry Training Board) affiliation for workforce training and development in the construction industry.
• CSCScoreStrategic or Co-development PartnerAll staff are CSCS registered demonstrating competence and qualifications in the construction industry.
• CHAScoreStrategic or Co-development PartnerCHAS (Contractors Health and Safety Assessment Scheme) accredited member demonstrating health and safety compliance standards.
• IPAFminorStrategic or Co-development PartnerIPAF (International Powered Access Federation) training and certification for powered access equipment operations.

Scale indicators1 record

Recent moves4 records

Expansion highlights4 records

Broad incumbents

• Fosroc: International construction chemicals manufacturer with a dedicated sealants and waterproofing range used on civil engineering, infrastructure, and commercial projects comparable to GPB's application segments.
• KCC Corporation: Korean construction chemicals and sealants manufacturer with a growing European presence in façade and civil engineering sealants, competing for the same multinational construction customer relationships as GPB indirectly.
• Sika AG: Global construction chemicals and sealants manufacturer with a wide portfolio of joint sealants, waterproofing, and bonding products used in the same civil, commercial, and residential settings as GPB's applications.
• Master Builders Solutions (BASF): BASF's construction chemicals brand offering sealants, waterproofing, and concrete solutions for infrastructure and commercial projects similar to GPB's civil and water-industry segments.
• Bostik (Arkema): Global adhesives and sealants manufacturer serving construction, industrial, and civil markets; competes with GPB indirectly as the supplier behind many contractor sealant specifications.
• Mapei: Italian-headquartered construction chemicals manufacturer supplying sealants, adhesives, and façade products to the same contractor and developer customers GPB serves across the UK and Europe.
• Tremco (RPM International): Construction sealants and waterproofing manufacturer serving façades, civil engineering, and commercial projects across Europe and the UK in the same end markets GPB operates in.
• Adshead Ratcliffe: UK-based manufacturer and supplier of construction sealants used in façade, glazing, and civil engineering applications; comparable because it supplies the same UK contractor base GPB serves.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks5 records

Key highlights5 records

Customer concentration

• LinkedInlinkedin.com/company/gpb-mastics-ltd
• TikToktiktok.com/@gpbmasticsltd

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

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 GPB (MASTICS) LTD