The Post Building, London

The Post Building, London

Construction Sealants Ltd are pleased to announce the new contract with Laing O Rourke on The Post Office in London. Works were to include all external and internal work to all fifteen floors, consisting of offices, retail, residential and roof terraces.

The Post Building renovates a Royal Mail sorting office on New Oxford Street in central London, bringing back into use a prominent site which has been derelict for over 20 years. The 320,000 sq ft mix of offices, retail, residential and community uses.

In total, the mixed-use development accommodates eight floors of office uses and seven floors of residential (including 100% of the required affordable housing provision on site) above a variety of public uses including shops, cafés, galleries, and a GP surgery for the local community.

In addition, the scheme will incorporate major on-site elements for the public, such as independent and specialty retailers, a doctor’s surgery, a public roof space, and cafe, as well as 21 south-facing, double-aspect, affordable apartments within steps of Covent Garden.


Construction Sealants and Laing O’Rourke have been working in partnership for over 14 years, and we have completed over 177 projects in this time, on budget and on time. With our experience and expertise, we will ensure that like all other projects that Construction Sealants undertakes is on time and on budget.

Our workforce undergoes extensive training and are all qualified to NVQ Level 2. Ensuring that we can sustain the highest of standards of work on sites across the UK. With a consultative approach to each project, we pride ourselves on the ability to apply the best-suited sealants to meet the building’s requirements. Our dedicated approach to each project is often commented on by our clients as we strive to offer the most affordable sealant solution in the industry. This has resulted in most of the work coming from repeat business from our previous customers. And why we pride ourselves as being one of the top UK Mastic and Sealant companies.

Construction Sealants Ltd supplied and installed Everbuild S50 & 825 on this project. For more information on this product please click the image below, where you can open the technical data sheets and place an order online with us. We also offer trade accounts for large orders and frequent buyers.

“Everbuild Tecnic S50 Silicone is perfect for sealing around all types of baths, shower trays as well as an expansion joint and corner sealing of ceramic tiles.”

Everbuild Silicone S50


“Everbuild Tecnic silicone 825 can be used as a weather sealing and joint sealing to pre-formed panels and curtain walling, glazing sealing and draught proofing.”

Everbuild Silicone 825


Why Choose Construction Sealants?

Construction Sealants Limited’s client list boasts some of the UK’s largest and most well-known construction companies. We aim to provide our customers with a level of service that few of our competitors can match, from the supply of quality sealants to the trade through to the application of specified sealants by a skilled workforce.

With the additional determination to provide your company with a highly competitive quote along with the highest quality products, we can help you to manage your costs effectively and maintain essential profit. We would be delighted to undertake a site visit enabling us to submit a guaranteed fixed price schedule and a comprehensive, detailed specification.

In choosing Construction Sealants Limited, you can depend on the following unrivaled accreditations.

  • Accredited and approved to CHAS, ISO 9001, and ISO 14001 & OHSAS 18001 Standards.
  • Members of the Association of Sealant Applicators which provides a ‘Price Warranty Bond’.
  • Fully compliant NVQ Level2 Workforce.
  • MEWP & PASMA trained operatives.

Stocks we install and supply

Speak to our professional team for a free quote 01708 555 007
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