Construction and new-build mastic in Bromley, Greater London
Sealant work in Bromley for main contractors, managing agents and facilities managers: mastic packages for new-build and refurbishment projects, quoted at a fixed price.
- Sanitary sealant damaged by following trades
- Different trades sealing to different standards
- Existing joints on a refurb that need cutting out and resealing
Need construction mastic in Bromley?
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
Construction mastic for commercial buildings in Bromley
Perimeter sealing outside needs a dry joint and the right temperature. Cold or damp mornings, frost and condensation on frames can all hold external sealing up, so we plan elevations with the forecast and the programme in mind. Internal sealing often fills those days. We work on window and door perimeters, cladding and panel joints and sanitary and kitchen joints, and the usual reasons a site gets in touch are sanitary sealant damaged by following trades and window and door perimeters that won’t pass inspection. A specialist sealant contractor works differently from a general builder: on jobs in Bromley, preparation and product choice get the time they need.
The ULEZ covers the whole of Greater London, so contractors’ vehicles on a job in Bromley must meet its standards or pay the daily charge. Add booked delivery slots and limited storage, and a London mastic package needs planning before the first bead.
Our workmanship is guaranteed for 12 months. If our installation lets you down in that time, we return and fix it.
- Place
- Bromley (BR2, BR1, BR6, BR5)
- Region
- Greater London
- Guarantee
- 12 months on every job
- Quotes
- A fixed quote before we start
- Telephone
- 01277 525 020
- Page updated
- 3 November 2026
Construction mastic around Bromley: what changes locally
The area within 2 miles of Bromley holds a number of hotels. Hotel refurbishments often run to tight programmes between busy periods, and perimeter and sanitary sealant has to keep up. As part of Greater London, Bromley is inside the ULEZ, which applies to every van on site. Delivery slots and scarce storage shape how and when the mastic goes in.
When units on a site such as Chartwell Business Centre, 1 mile to the east of Bromley, are refurbished or reclad, the panel joints and window perimeters are part of the mastic package. Building work at universities like University of Greenwich - Avery Hill, 4.1 miles to the north-east of Bromley, is often timed for the summer, mastic included.
Bromley is about 8 miles south-east of London, in Greater London. Commercial clients in Bromley use us for work on mastic packages. We work across 764 places in Greater London. Our London page has more on work in that area (8 miles or so).
Anyone looking for construction mastic in BR2, BR1, BR6 and BR5 gets the same process as the rest of our area: send details, get a quote, we seal, guaranteed. We cover commercial and managed buildings on High Street, Church Road and St Paul's Square and the roads nearby. Main routes into Bromley include the A222 and A223, which helps when planning parking and deliveries for the job. Sites close to Bromley are covered too, including Sundridge (1 mile north-east), Plaistow (1 mile north), Bickley (1 mile east), Widmore (1 mile east) and Downham (2 miles north). Nearby towns on our patch include London (8 miles north-west), City of Westminster (11 miles north-west), Marylebone (11 miles north-west), Kensington (12 miles north-west), St Pancras (10 miles north-west) and Shoreditch (9 miles north-west).
Near you in Bromley
Locally, jobs take us to sites close to Bullers Wood School for Boys, The Richmal Crompton pub and Church House Gardens, among other places. There’s a railway station in Bromley itself: Bromley South station. Other landmarks nearby include The Mall (under half a mile east) and Bromley Hospital (less than half a mile south-east). Not far away are Downham Woodland Walk and Summer Hill.
Doing it in-house
A short, simple internal joint is often within reach of a maintenance team. The usual problems come from preparation: sealing over old material, sealing onto damp or dusty surfaces, or a product that can’t take the movement.
Redoing a failed joint normally costs more than getting it right at the outset, since all of it has to come out and the faces be cleaned back again. That’s why many clients bring in a specialist from the beginning.
After the work
Once the work is signed off, a little attention goes a long way:
- Protect sealed areas from following trades
- Put any product change through the designer first
- Note which sealant went where at handover
- Plan external elevations with the weather in mind
If a joint is damaged after sealing, flag it early. Snags can be picked up in a planned close-out visit.
Oversized gaps are a problem better caught early. Filling a wide gap with sealant alone sets up a failure. We flag them as soon as we see them.
Cost factors for mastic packages
There’s no standard rate for sealant work, because every site is different. What we look at:
- Working within restricted access windows
- The site’s rules and procedures
- Which sealant the job calls for
- Any access equipment needed
A quote for mastic packages depends on quantities, condition and access, and any specification that applies. Call for a quote.
What to include in your enquiry
Good information means a firmer quote. Helpful details to send:
- Access details, including height
- Whether an asbestos survey exists
- Specification clauses that apply
- Approximate linear metres or a joint schedule
Send details, get a quote, we seal, guaranteed: that’s how every job runs. To take the first step, call the office on 01277 525 020 or email the details over.
Diagnose, treat, sign off
The first thing on site is a walk round with your contact, agreeing which joints are in scope, where to start and what must stay open. Then we strip out anything that has failed, prepare every joint and seal it. The ULEZ covers the whole of Greater London, and parking near a job is rarely simple. If there’s a loading bay, a car park or a permit we can use, tell us when you send details.
- We start with the drawings, specification and programme.
- Quantities are measured and a fixed price returned.
- The sequence is agreed with the site manager.
- Plots or floors are sealed as they’re handed over.
- Every joint is cleaned, set to depth and sealed with the specified product.
- Snags are cleared and the package signed off with our 12-month guarantee.
Preparing the site
- Send your site hours and access windows
- For older buildings, check the asbestos register before work
- Let us know about inductions and permits
Get a fixed quote
Need a figure for a tender or a budget? Send the scope and any drawings, and we will return a fixed quote you can plan around. If you have questions first, call the office on 01277 525 020 or email us.
Read more
What else we do in Bromley
Questions about Bromley
Can you work in a London building with booked loading and goods-lift slots?
Yes. Booked loading bays, goods lifts and permit-to-work systems are normal for London jobs. Say when the building is occupied and when it’s quiet, and we’ll plan accordingly.
Will you take on work at estates like Chartwell Business Centre, close to Bromley?
Yes, sites like Chartwell Business Centre are within our area, along with the rest of Bromley. Photos and a short description are enough for a first look.
Can you work while the building is occupied?
Yes, with some planning. Tell us your site hours and access windows and we will plan around them.
What happens if old sealant might contain asbestos?
Some older mastics, especially in pre-2000 buildings, can contain asbestos. We check the asbestos register before cutting out old sealant in an older building, and work stops until any suspect material has been tested. Removing asbestos is a job for asbestos specialists, not us.
How soon can the area be used again?
That comes down to the sealant and the temperature. Some products skin over quickly but need longer to cure fully, so we will confirm the curing time on the day.
Can you send site paperwork?
Each site asks for different documents, so list what you need, whether RAMS, insurance or CSCS details, and we’ll confirm with the quote.
How do you choose the sealant?
Where there’s a specification, we use the product it names. Otherwise, we recommend a product to suit the joint’s movement, the substrate and the conditions, following the manufacturer’s guidance.
Common problems we fix in Bromley
Dust is the enemy of adhesion on a construction site. Plaster dust, release agents, protective film residue and damp all stop sealant bonding so faces get cleaned, and primer goes on wherever the maker specifies, even on new work.
Site and facilities staff are often the first to spot these:
- Early adhesion failures on new external joints
- Different trades sealing to different standards
- Frame gaps too wide for sealant alone
- Sealant knocked or painted over by other trades
Hotels like Royal Bell Hotel, less than half a mile to the north of Bromley, rarely close for long, so refurbishment mastic is phased floor by floor.
Before you book anyone
- How they’ll work around occupants
- Are they CHAS accredited or on Constructionline?
- Which product they’ll use, and why it suits the joint
- What site paperwork they can supply
Building owners, agents and FMs in Bromley
Building owners and managing agents use us on sealant work across single buildings or whole portfolios around Bromley. One quote can cover more than one site, so there’s one set of paperwork to deal with.
Main contractors use us as their sealant subcontractor on new-build and refurbishment projects. We work to your programme, your specification and your site rules, and our applicators hold CSCS cards.