Greater London · England
New Build Mastic in Anerley
New build mastic for Anerley, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Shower seals failing in the first year or two
- Frame joints opening as the plaster dries
- Sealant applied over dusty or wet surfaces
What sealant work can’t fix
To be straight with you, there are a few things sealant will not fix:
- Leaking fittings rather than failed sealant
- Disputes or warranty claims with your builder
- Broken tiles or a split tray
If in doubt, ring 0345 464 0079 or drop us an email and we’ll say what we think.
Joints and surfaces we work on
- Bathrooms & en suites
- Kitchens
- Show homes
- Windows & doors
- Plot handovers
- Skirting & floors
New build mastic in Anerley, done properly
A new house keeps drying out and settling for its first couple of years. Timber dries and shrinks, and baths and trays settle, so sealant that was laid quickly before handover often cracks. If you’re dealing with second-fix sealing on new plots and cracked caulk along new skirting, we can help, on skirting & floors, plot handovers and show homes alike.
New flats are going up across London, many of them in larger developments. In a new development, snags are often reported through the developer or the managing agent, and shower seals that fail early, skirting joints that open up and gaps at thresholds are all common snags.
All our work comes with our 12-month guarantee.
- Place
- Anerley (SE20, SE19, SE26)
- Region
- Greater London
- Cover
- 12 months on all our work
- Quote
- A clear price before work begins
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Joints and finishes in Anerley homes
Many of London’s new homes are flats in bigger developments, where snagging may go through the developer or managing agent. London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you’ve bought a new home near Anerley station, the sealant around baths, showers and frames is worth checking in the first year or two.
Anerley is about 2 miles north-east of Thornton Heath, in Greater London. Across the SE20 area, we cover new build mastic for homes and businesses. Our area takes in 764 places across Greater London, large and small. We also work in London, about 6 miles from Anerley.
Postcode districts we cover here for new build mastic: SE20, SE19 and SE26. You will find streets such as Maple Road, Padua Road and Genoa Road, all of which we cover. Other places close to Anerley include Penge (1 mile east), Crystal Palace (1 mile north), Sydenham (1 mile north-east), Gipsy Hill (1 mile north-west) and Upper Norwood (1 mile west). We also work in nearby towns such as London (6 miles north), City of Westminster (8 miles north-west), Marylebone (8 miles north-west), Kensington (8 miles north-west), St Pancras (8 miles north) and Shoreditch (8 miles north).
Near you in Anerley
Locally, jobs take us to homes and businesses close to Crystal Palace School, Crystal Palace Dinosaurs and Harris City Academy Crystal Palace, among other places. There’s a railway station in Anerley itself: Anerley station. Well-known places in the area include Crystal Palace Museum (0.5 miles north-west) and Whitgift Centre (3.1 miles south-west). The countryside around Anerley includes Dulwich Upper Wood and Knight's Hill.
Should I try it myself first?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
How the visit works
When we arrive, we start by going over the job with you. We protect the surfaces around the joints before work begins. Most jobs take a few hours for most snagging lists, longer for a run of plots. In Anerley, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.
- Each joint is checked for movement before we start.
- 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.
- We check every joint and leave you with the cure times.
Getting ready for the visit
- Mention any parking rules near the property
- Let us know about earlier repairs to the joints
- Tell us about any water getting in
Get a quote
We quote each job on its own, so the first step is telling us about yours. Simply phone 0345 464 0079 or email us and describe the job.
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Other services in Anerley
When to call us in Anerley
The wrong product is sometimes used in the wrong place: caulk where water collects, or a rigid product on a moving joint. Both fail early.
Signs it’s time to call us include:
- Cracked sealant around new window and door frames
- Gaps opening as the house dries out and settles
- Sealant work across a run of new homes
- Shower seals failing in the first year or two
Anerley is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
What your quote should include
- Who turns up on the day
- What guarantee comes with the work
- Whether you can choose the colour
- How long to leave it before use
FAQs for Anerley
Is parking a problem for a job in Anerley?
Parking in Anerley, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly, so mention what’s available when you book.
Do you cover Anerley for new build mastic?
Yes, Anerley is within the area we cover. Our work covers London and the South East. Just ring 0345 464 0079 or send us an email with a few details of the job, and we’ll give you a clear quote.
What sealant do you use?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We explain the product when we quote.
How long should I leave it?
Different products cure at different speeds, so please follow the time we give you when we finish.
Do you do commercial work?
Yes. We’ve worked for hotels, offices and other businesses, and we are fully insured.
Do you guarantee your work?
Yes, always. Each job is guaranteed for twelve months.
Do I have to be there?
Access is agreed with you when the job is booked. Indoors, that generally means someone at home.
Is it messy?
No. We work neatly, protect the area around the joints and tidy up afterwards.
Work for landlords, hotels and businesses
We also work for property managers and facilities teams in Anerley and across Greater London. We can quote a run of properties together.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. Several properties can be quoted together.
Keeping the joints in good condition
How long the joints last depends on use and care. Here’s what we suggest:
- Check bath and shower seals every few months as the house settles
- Keep pictures and emails about snagging items
- Raise failed sealant with the developer while you are covered
- Follow the cure time we give you
Don’t stand on the bath edge or the lip of the tray. If a bath or tray moves when you stand in it, get it looked at.
Early snagging is easier snagging. Left alone, a small crack can become a leak.
What happens if it’s left?
If you are still in the builder’s snagging or warranty period, ask them to put it right first. If it keeps failing or isn’t dealt with, we can reseal it properly. In London conversions, one flat’s bathroom is often above another flat’s ceiling, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Putting it right early is much less trouble.
Leaving a failed joint usually makes the job bigger, not smaller, as water and mould keep getting in. If you are not sure whether it needs doing, ring 0345 464 0079 or email us and we’ll give you an honest view and a quote.
Why choose Mr Mastic in Anerley
- White, clear, grey or another colour, product permitting
- Sealant colour chosen to suit
- Sanitary silicone with an anti-fungal additive in wet areas
- Neat joints and a tidy finish
Read what affects the cost or our reviews.