Greater London · England
New Build Mastic in Rotherhithe
New build mastic for Rotherhithe and the surrounding area: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Smeared, uneven beads picked up at snagging
- Cracked sealant around new window and door frames
- Plot mastic for developers ahead of handover
What sealant work cannot fix
Before you book, it’s worth knowing the limits too:
- Disputes or warranty claims with your builder
- Cracking that points to a structural problem
- Broken tiles or a split tray
If you’re not sure, just phone 0345 464 0079 or drop us an email and we will give you a straight answer before you book.
What we seal
- Windows & doors
- Show homes
- Kitchens
- Plot handovers
- Bathrooms & en suites
- Skirting & floors
How we handle new build mastic in Rotherhithe
Building dust is behind a lot of failed new-build sealant. Each joint is cleaned of dust and primed where the product calls for it, so the new bead bonds properly instead of bonding to the dust. We work on windows & doors, skirting & floors and kitchens, and the jobs we see most are beads laid onto grit and dust from the build and gaps opening as the house dries out and settles.
New flats are going up across London, many of them in larger developments. Snagging there often goes through the developer or managing agent, and failed shower seals, open skirting joints and gaps at thresholds are typical.
A one-year guarantee comes as standard, so you are covered after we’ve gone.
- Location
- Rotherhithe (SE16, SE8, E1W)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Quote
- A clear price before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
DIY sealant or a professional job?
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.
New build mastic in Rotherhithe: local notes
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 Canada Water station, the sealant around baths, showers and frames is worth checking in the first year or two.
Rotherhithe is about 2 miles south-east of Whitechapel, in Greater London. Jobs in Rotherhithe get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Rotherhithe is one of 764 towns and villages in Greater London where we work.
Here we cover the SE16, SE8 and E1W postcode area for new build mastic. That includes homes and businesses on Bush Road, Gomm Road and Swan Road. Main roads around Rotherhithe include the A200, so getting to you is simple. We also cover the places around Rotherhithe: Surrey Quays (1 mile south), Surrey Canal (1 mile south), South Bermondsey (1 mile south-west), Millwall (1 mile south-east) and North Greenwich (1 mile south-east). Larger places within reach include City of Westminster (5 miles west), Marylebone (5 miles west), Kensington (7 miles west), St Pancras (4 miles north-west), Walthamstow (6 miles north) and Hoxton (3 miles north-west).
Landmarks near Rotherhithe
Typical jobs here are in homes near The Ship York pub, Bacon's College and Russia Dock Woodland, among other places. Rotherhithe has its own railway station: Canada Water station. Nearby you’ll also find St Olave's Hospital (0.5 miles west) and Tower of London (1.6 miles north-west). Green spaces nearby include St. James's Park Lake and Tower Hill.
Why deal with it now?
The builder is usually the first port of call while the snagging or warranty period runs. If it’s slow, or the same joint keeps failing, a proper reseal from a specialist is the next step. Damp from a failed joint spreads quietly in older London brickwork and timber, and once it shows in Rotherhithe, the repair is bigger than a sealant job.
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, plus any working-time requirements on site. Call for a quick quote and we’ll go through it with you.
Why book with us
- We agree the colour with you first
- Over 20 years’ experience
- Arbo and Everbuild products
- A choice of colours where the product allows
Take a look at what affects the cost and what customers say.
What the job involves on each surface
Show homes
Tired or marked sealant in a show home can be renewed. The old bead comes out and a clean new one goes in.
Kitchens
New-kitchen sealant is often applied in a rush. We take it out and reseal neatly, colour-matched where it shows.
What we’re called out for in Rotherhithe
A new house holds a lot of water from the build, and it dries out over the first couple of years. As it does, timber shrinks and joints open, and sealant that can’t keep up splits.
These are the problems we are asked about most:
- Gaps behind new kitchen upstands
- Messy sealant that spoils new finishes
- Joints pulling apart as timber shrinks
- Sealant work across a run of new homes
As a London address, Rotherhithe can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Before you book anyone
- How the joint is cleaned and prepared
- Is the old sealant removed completely?
- The length of the guarantee
- When the joint can take water or movement
The process
When we get to you, we check the joints match what you told us. If anything is different, we explain it before carrying on. Most jobs then take a few hours in a single home. In Rotherhithe, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.
- We go through the snagging list or plot schedule and agree the joints to do.
- We cut out every bit of the failed or messy sealant.
- Each joint is cleaned of dust and grit, then primed if required.
- A sealant chosen for each area goes in and is tooled smooth.
- We check every joint and tell you how long each needs to cure.
Before we arrive
- Mention any sign-in or site rules at work premises
- Move anything stored near the joints
- Tell us if parking is tricky
Get a quote
For a quote, phone 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. You will have a clear quote before we start.
Related advice
Towns and villages near Rotherhithe
What else we do in Rotherhithe
Keeping the joints in good condition
So the new joints stay in good condition:
- Keep photos and emails about snagging items
- Do not seal over failed sealant yourself
- Put sealant faults on your snagging list early
- Follow the cure time we give you
Leave the sealant for the cure time we give you before showering or bathing. Most silicones need around a day to cure enough for use.
Do not let the snagging period run out with sealant problems unreported. After that, putting it right may fall to you.
Rotherhithe questions
I let a flat near Canada Water station. Can you help?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or drop us an email and tell us about the property, and we’ll give you a clear price.
Is parking an issue for new build mastic in Rotherhithe?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. That way the visit can be planned around it.
Do you work for hotels and businesses?
Yes. We can plan bigger jobs in stages to suit the site.
Are you insured?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
Do you use white or clear sealant?
We use white, clear or a colour to suit the finishes. Tell us what you’d like when you get a quote.
How long should I leave it?
Cure times vary by product. Before we leave, we will tell you the cure time.
Are you an approved applicator?
Yes. We’re approved under the ARBOMaster scheme.
Will the old sealant be removed?
Yes. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.