Construction Sealants

What Construction Sealants does

Construction Sealants Limited is a UK-based specialist sealant application contractor founded in 1989 and operating for 35 years. The company delivers nationwide mastic sealant application services from two operational offices in Laindon, Essex and Chorley, Lancashire, under a holding structure (Construction Sealants (Holdings) Ltd). Its services span expansion and contraction joints, new construction sealing, remedial contracts on landmark buildings, annual inspection term contracts, fire protection, acoustic sealing, saw cuts and floor joints, sanitary and wet area applications, anti-pick sealants for secure facilities, and marine and swimming pool sealants.

The company's revenue model is dual-track. First, it operates a professional services business delivering specialist application workforces to leading building contractors across the UK, priced on a project-by-project basis. Second, it runs an e-commerce platform (Sealant Supplies at sealantsupplies.co.uk) selling branded sealants, tools, primers, and accessories direct to tradespeople and consumers, supported by a trade account program with monthly credit limits and bulk discounts. The go-to-market is primarily direct enterprise field sales for the services side and self-serve e-commerce for the product side, supplemented by SEO and a newsletter funnel. The product portfolio is anchored on a multi-brand supplier ecosystem including tier-one manufacturers such as Sika, Mapei, Dow Corning/Dowsil, and PC Cox.

The business serves building contractors on the services side and tradespeople, contractors, and individual buyers on the product side, with a horizontal segmentation approach across construction vertical sub-segments. Pricing is not publicly itemised but includes unit pricing with bulk order discounts, free shipping thresholds (£400), and trade account preferential rates.

Name

Construction Sealants

Legal name

Construction Sealants Limited

Website

https://constructionsealants.co.uk

Company type

Private

Founded year

1989

Operating status

Operating

Headcount range

11–50 employees

Short description

Construction Sealants Limited is a UK-based specialist sealant application contractor and e-commerce retailer, founded in 1989, serving building contractors nationwide with professional application services and a branded product shop via Sealant Supplies.

Ownership category

akta.pro rank

Product category

Construction Sealant Application Services

NAICS

Foundation, Structure, and Building Exterior Contractors (2381), Other Foundation, Structure, and Building Exterior Contractors (238190)

SIC

Adhesives & Sealants (2891), Construction - Special Trade Contractors (1700)

akta.pro primary industry

Sealants, Expansion Joints & Weatherproofing (Caulking, Joint Systems) (IMAFAMAF)

akta.pro secondary industries

Construction Sealants (Joint, Façade & Perimeter) (IMADAOAB), Sealants (Construction & Industrial) (IMAEAGAI), Firestopping & Fire-Resistant Sealants (IMADAOAI), Concrete Repair, Sealing & Waterproofing (Coatings/Membranes) (IMAIAKAK)

Keywords

• Sealant application services
• Mastic sealants supply
• Construction joint sealing
• Fire protection sealants
• Building waterproofing services

Headquarters

HQ city

Rainham

HQ country

United Kingdom

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Marketing or Sales, Infrastructure

Revenue model

1. Application Services: Specialist sealant application contractor services including new construction, remedial contracts, term contracts, fire protection, acoustic sealing, and marine/swimming pool applications. Services delivered nationwide by experienced workforce.
2. Product Sales: Online sales of mastic sealants, adhesives, tools, and accessories through their e-commerce platform. Products include silicones, waterproofing materials, foams, fillers, fire protection products, and application tools. Built on over 25 years experience in the construction industry.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels3 records

Core offering

Construction Sealants Limited is a UK-based specialist contractor that applies mastic sealants for building contractors nationwide, covering expansion and contraction joints, new construction sealing, remedial work on landmark buildings, fire protection, acoustic sealing, floor joints, sanitary and wet areas, anti-pick, and marine/swimming pool applications. The company also sells a full range of branded sealant products, adhesives, primers, and applicator tools through its Sealant Supplies e-commerce platform, supported by trade accounts for applicators and contractors.

Product overview

Construction Sealants Limited operates as a specialist sealant application contractor and online retailer based in the UK, with over 35 years of industry experience. The company offers a dual business model: (1) professional sealant application services delivered by an experienced workforce nationwide, covering expansion/contraction joints, new construction, remedial contracts, term contracts, fire protection, acoustic sealing, saw cuts and floor joints, sanitary and wet areas, anti-pick applications, and marine/swimming pool sealants; and (2) an e-commerce platform (Sealant Supplies) selling a wide range of branded sealant products, tools, primers, and accessories. The product portfolio includes named brands such as Sika (Sikaflex 221, Sikasil Pool, SikaHyflex 250 Facade), Mapei (Mapesil AC), C-Tec (CT1 Sealant & Adhesive), Everbuild, Soudal, and PC Cox applicator tools (Easiflow HD Pro, POWERFLOW 600ML COMBI), alongside various nozzle accessories. Services and products are primarily targeted at building contractors, tradespeople, and facilities managers across the UK.

Differentiator

Problem solved

Functional benefit

Products and services

• Expansion & Contraction Joints

Named customers1 record

Segments1 record

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

16 partnerships are on record, tiered minor and core.

• Adshead RatcliffeminorOthersBrand partnership where Construction Sealants stocks and supplies Adshead Ratcliffe sealant products.
• Bond ItminorOthersBrand partnership where Construction Sealants stocks and supplies Bond It sealant and adhesive products.
• CelltexminorOthersBrand partnership for Celltex sealant products supplied through Construction Sealants.
• CromarminorOthersBrand partnership where Construction Sealants stocks and supplies Cromar building materials including waterproofing products.
• CT1minorOthersBrand partnership for CT1 sealant and adhesive products, a popular construction adhesive brand.
• Dow Corning (Dowsil)coreTechnology or IntegrationKey brand partnership for Dow Corning (now Dowsil) silicone sealant products, one of the trusted names in the construction industry. Major supplier of swimming pool and specialized sealants.
• EverbuildminorOthersBrand partnership for Everbuild sealant and adhesive products, a well-known brand in the UK construction market.
• FosrocminorOthersBrand partnership for Fosroc construction chemical products including sealants and waterproofing materials.
• GeocelminorOthersBrand partnership for Geocel sealant products, part of the Dow Chemical portfolio.
• IllbruckminorOthersBrand partnership for Illbruck sealing and bonding products.
• MapeicoreTechnology or IntegrationKey brand partnership for Mapei products including Mapesil AC silicone sealants available in 42+ colours matching Mapei grout range, and swimming pool sealants.
• Otto ChemieminorOthersBrand partnership for Otto Chemie sealant products.
• PC CoxcoreTechnology or IntegrationKey tool supplier partnership for PC Cox mastic applicator guns, follower plates, and nozzles. Products include Easiflow HD skeleton guns, MidiFlow Combi barrel guns, and various nozzles.
• SikacoreTechnology or IntegrationMajor brand partnership for Sika products including Sikaflex, Sikasil pool sealants, Hyflex facade sealants, and Sika branded tools and primers.
• SoudalminorOthersBrand partnership for Soudal sealants including Fire Silicone B1 FR, primers, and Soudaflex products.
• Tremco illbruckminorOthersBrand partnership for Tremco illbruck sealing and waterproofing products.

Scale indicators2 records

Expansion highlights4 records

Broad incumbents

• Fosroc: Fosroc is an international construction-chemicals manufacturer supplying waterproofing and sealant products stocked by CSL. Comparable as a broad incumbent competing in infrastructure and commercial sealing applications, frequently specified by UK main contractors.
• Sika UK: Sika is a global specialty chemicals company whose Sikaflex, SikaHyflex and SikaSil ranges are stocked and installed by Construction Sealants. Overlaps as both an upstream supplier and a competing contractor on larger building-envelope and infrastructure sealing projects across the UK.
• Bostik (Arkema): Bostik is a global adhesives and sealants manufacturer (parent of Everbuild, a CSL partner brand). Comparable as a broad-incumbent supplier competing on sealant specifications across construction, flooring, and DIY/trade channels in the UK.
• Soudal: Soudal is one of the world's largest independent sealant and adhesive manufacturers, supplying Soudaflex and Fire Silicone B1 FR lines that CSL stocks. Comparable as a broad sealant incumbent with overlapping fire-protection and construction product ranges in the UK market.
• Mapei UK: Mapei is a global construction chemicals manufacturer supplying Mapesil AC and other sealants installed by CSL. Comparable as a broad incumbent that competes both via product supply and via direct/specified contractor relationships on commercial and pool-sealing projects.
• Tremco illbruck: Tremco illbruck is a European sealant, façade and waterproofing specialist serving construction and infrastructure. Comparable to CSL as a broad incumbent offering both specialist application services and proprietary sealing systems across commercial and façade projects.
• Dow / Dowsil: Dow (Dowsil silicone sealants) is a global silicone and sealant manufacturer. Listed as a core CSL partner for swimming-pool and specialist silicone sealants; comparable as a broad incumbent whose products and specified-application services overlap with CSL's marine/pool offering.

Emerging players

• Adshead Ratcliffe: Adshead Ratcliffe is a UK heritage sealants manufacturer and ARBO's parent. Listed as a brand stocked by CSL; comparable as an emerging specialist sealant player competing in the same UK construction and industrial sealing specification markets.
• C-Tec (CT1): C-Tec / CT1 is a UK-based construction sealant and adhesive brand whose products are stocked and applied by CSL. Comparable as an emerging specialist brand that competes on the same retail and specification shelves as CSL's e-commerce range and is increasingly used by competing applicators.

Direct peers

• ARBO: ARBO is a UK-based specialist sealant manufacturer and applicator serving construction and building envelope projects. Directly comparable to Construction Sealants as both operate specialist mastic-sealant application services and supply complementary sealant systems to UK contractors; ARBO is also a listed brand partner on CSL's website.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/CSealants

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 Construction Sealants