Greater London · England
New-build mastic & snagging in Bromley, Greater London
New build mastic in Bromley from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Internal frame sealant that has split
- Beads laid onto grit and dust from the build
- New-build shower sealant that has already split
What affects the cost of new build mastic
Call for a quick quote. The main things that affect it are:
- Whether the work is at height
- Any working-time requirements on site
- The amount of work
- Which sealant suits the joint
Combining jobs into one visit is usually more efficient than separate visits, so tell us about everything that needs sealing. You’ll get one clear quote for the whole job.
Asking for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- Any previous sealing or DIY work
- Access, such as stairs, a lift or height
- Pictures of the joints, sent by email
- What’s wrong with the joints now
For a quote, phone 0345 464 0079 or email us with the location and a short description of the problem. We will give you a clear price before any work starts.
New build mastic for homes and businesses in Bromley
Across Bromley, we work for both new-home owners and the builders handing those homes over. One shower or a whole phase of plots, the method doesn’t change: remove, clean, prime where needed, then a neat new bead. We work on bathrooms & en suites, plot handovers and windows & doors, and people most often call us about plot mastic for developers ahead of handover and sealant that never bonded to the surface.
London homes range from new-build flats to period conversions with new floors laid over old boards. Wherever a floor meets a wall, a skirting or a threshold, the joint has to allow for movement.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Place
- Bromley (BR2, BR1, BR6, BR5)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Quote
- A clear price before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Other services in Bromley
Common questions in Bromley
Is parking an issue for new build mastic in Bromley?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. The visit is then planned around what’s available.
Do you work for landlords with property near Bromley South station?
Yes, we work for landlords and agents. Just phone 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear quote.
Is the work guaranteed?
Yes. All our work carries our 12-month guarantee.
Do you hold any approvals?
Yes. We are approved under the ARBOMaster scheme, the approved applicator scheme for Arbo sealants.
How much does new build mastic cost in Bromley?
It depends on the job, so we quote each one individually. To get one, call 0345 464 0079 or drop us an email with a short description of the job.
Is it worth resealing while the house is still settling?
If the seal has failed and water is getting in, do it now. Hairline cosmetic gaps can wait until the house has settled.
Where do you work from?
Our base is in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
Do you work for developers?
Yes. We work through plots to your schedule ready for handover. Get in touch with the number of plots and the scope for a clear quote.
What we cannot put right
Honest advice matters more to us than a booking, so here’s what new sealant will not do:
- Cracked trays, tiles or worktops
- Cracking that points to a structural problem
- A tray or bath that is not properly supported, until it’s fixed
If you are not sure, just call 0345 464 0079 or email us and we will give you a straight answer before booking.
Where we work in Bromley
- Windows & doors
- Bathrooms & en suites
- Skirting & floors
- Show homes
- Plot handovers
- Kitchens
How to look after the new joints
Simple care keeps the joints in good condition. Our advice:
- Follow the cure time we give you
- Wipe joints with warm soapy water
- Raise failed sealant with the developer while you’re covered
- Don’t seal over failed sealant yourself
Keep an eye on the joints over the first couple of years. Small gaps can appear as the house dries.
If a shower tray or bath seal splits in the first year, look for movement. Getting it resealed properly, and any movement checked, stops it recurring.
What we’re called out for in Bromley
Fresh sealant can be knocked or cut by trades finishing off. A bead disturbed before it has cured may never seal properly and it shows once the home is in use.
Common reasons people contact us include:
- Worktop and upstand sealant coming away
- Gaps between new skirting and floors
- Sealant work across a run of new homes
- Messy sealant that spoils new finishes
As a London address, Bromley can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Questions to ask before booking
- Whether the sealant suits the joint
- What happens if the job turns out different
- Is the old sealant removed completely?
- How long to leave it before use
Leave it or put it right?
If you’re still in the builder’s snagging or warranty period, ask them to put it right first. If it’s slow, or the same joint keeps failing, a proper reseal from a specialist is the next step. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and once it shows in Bromley, the repair is bigger than a sealant job.
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you are not sure whether it needs doing, phone 0345 464 0079 or email us for an honest opinion and a quote.
Why us?
- Old sealant always removed completely
- Fully insured
- You choose the colour before work begins
- More than 20 years in sealant work
See our cost guide or what customers say.
How it works
All our tools and materials come with us in the van. After a quick look at the joints together, we protect the area and start. Most jobs take anything from a few hours to several days, depending on the number of plots. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Bromley. It helps if you can point us to a visitor permit or a bay close to the door.
- Each joint is checked for movement before any work starts.
- Old sealant is cut out and the joints cleaned.
- We make sure the joints are dry and prime them if needed.
- New sealant goes in, with baths filled first so they’re at their heaviest.
- The finished joints are checked and the cure times given.
Preparing for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Tell us about any previous sealing or DIY attempts
- Keep children and pets away from the work area
Getting a quote
Getting a quote is simple: tell us what needs doing and where, and roughly how big it is. Photos by email help us understand the job, and we will come back to you with a quote.
Advice
For landlords and businesses
For anyone letting property in or around Bromley, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs, and pictures by email help.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
What new build mastic looks like in Bromley
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Many of London’s new homes are flats in bigger developments, where snagging may go through the developer or managing agent.
If you’ve bought a new home near Bromley South station, the sealant around baths, showers and frames is worth checking in the first year or two.
Bromley is about 8 miles south-east of London, in Greater London. Our applicators cover new build mastic for homeowners, landlords and businesses in Bromley and the surrounding area. We cover 764 towns and villages across Greater London, from the larger towns to small villages. Our London page covers work nearby, about 8 miles away.
We work across BR2, BR1, BR6 and BR5 for new build mastic. We cover properties on High Street, Church Road and St Paul's Square. You’ll find Bromley on the A222 and A223, so it’s easy for us to get to with everything needed for new build mastic. Nearby, we also carry out new build mastic in Sundridge (1 mile north-east), Plaistow (1 mile north), Bickley (1 mile east), Widmore (1 mile east) and Downham (2 miles north). Larger places within reach 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).
What’s near Bromley
We work in homes and buildings around 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. Well-known places in the area include The Mall (under half a mile east) and Bromley Hospital (within half a mile south-east). Open spaces near Bromley include Downham Woodland Walk and Summer Hill.