Greater London · England
New Build Mastic in Kevington
Plot mastic for developers and snagging failed sealant in new homes for Kevington, backed by a one-year guarantee. Ask us for a quote.
- New-build shower sealant that has already split
- Second-fix sealing on new plots
- Sealant that never bonded to the surface
How we handle new build mastic in Kevington
Failed shower seals, gaps along the skirting and messy beads are common items on a new-home snagging list. If you are still within the builder’s snagging or warranty period, tell them first, and if it is not put right, get in touch with us. We work on plot handovers, bathrooms & en suites and kitchens, and the jobs we see most are skirting joints opening in the first winter and sealant applied over dusty or wet surfaces.
Shops, offices and commercial units across London have hard-wearing floors with movement joints that need resealing as they wear, while new homes need a neat, sound finish around frames, baths and kitchens before handover, in Kevington and beyond.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Location
- Kevington (BR5)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Price
- A clear price before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Landlord and commercial work in Kevington
From a single let to a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. We can quote for more than one property at once.
How to look after the new joints
Aftercare is simple:
- Check bath and shower seals every few months as the house settles
- Do not wait for the house to settle if water is getting through
- Ventilate bathrooms well, especially in the first year
- Record problems with dated pictures
Photograph failed sealant before it’s redone and keep the builder’s replies. It’s useful if you need to raise other issues later.
Lifting sealant traps moisture and mould behind it. Dealing with it before it goes black saves a harder job later.
Nearby places to Kevington
What else we do in Kevington
What new build mastic looks like in Kevington
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. 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 St Mary Cray station, the sealant around baths, showers and frames is worth checking in the first year or two.
Kevington is about 1 mile east of Orpington, in Greater London. Wherever you are in the BR5 postcode area, we cover new build mastic for homes and businesses. Our Greater London coverage runs to 764 places, and Kevington is one of them. For nearby work, see our London page (13 miles or so).
Here we cover the BR5 postcode area for new build mastic. We cover properties on Crockenhill Road and Sheepcote Lane and the roads around them. Nearby, we also carry out new build mastic in Derry Downs (1 mile west), Crockenhill (1 mile east), St Mary Cray (1 mile west), Orpington (1 mile west) and Poverest (2 miles west). Within a short drive, we also cover London (13 miles north-west), City of Westminster (15 miles north-west), Marylebone (15 miles north-west), St Pancras (15 miles north-west), Shoreditch (13 miles north-west) and Walthamstow (15 miles north-west).
Landmarks near Kevington
Locally, jobs take us to homes and businesses close to The Priory School and Harris Academy Orpington. For rail, the closest station is St Mary Cray station, about 1.4 miles north-west of the centre. Well-known places in the area include Lullingstone Castle (3.2 miles south-east) and London Borough of Bromley Museum (1.5 miles west). Open spaces near Kevington include Summer Hill and The Warren.
Can I do it myself?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so tell us about it when you ask for a quote.
Signs you need new build mastic in Kevington
If plaster or screed was still damp when it was sealed, the bond suffers. Site programmes do not always leave time for joints to dry first.
The most common problems we see are:
- Shower seals failing in the first year or two
- Sealant that never bonded to the surface
- Gaps behind new kitchen upstands
- Skirting joints opening in the first winter
Kevington is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Before you book anyone
- What product goes in the joint
- Are they insured?
- Who turns up on the day
- Which colour the sealant will be
Why deal with it now?
Water getting past a failed seal in a new build reaches walls and floors that are still settling. Dealing with it early keeps the damage away from ceilings, floors and finishes. Converted houses in London often have a bathroom above someone else’s living room, and a slow leak from a failed seal can end up in the flat below. Dealing with it early is far simpler.
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, along with when we can work on site. Call for a quick quote and we’ll explain what it covers.
Why book with us
- Every job guaranteed for a year
- Neat joints and a tidy finish
- Over 20 years’ experience
- Trusted Arbo and Everbuild sealants
See what affects the cost and what customers say.
The process
Once we’re on site, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. Most jobs then take anything from a few hours to several days, depending on the number of plots. In Kevington, flats, stairs and shared entrances are part of the routine. If the building has a concierge, managing agent or access rules, tell us when you book.
- We start by agreeing which joints are on the list, from the snagging sheet or plot schedule.
- Failed or untidy sealant is cut out completely.
- Surfaces are cleaned of building dust and primed where needed.
- 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.
How to prepare
- Try not to wet indoor joints just before the visit
- Move anything stored near the joints
- Mention if the joints have been sealed before
How to get a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
Advice
Questions from Kevington
Can you do new build mastic in Kevington?
Yes, Kevington is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or drop us an email with a few details of the job.
Can parking be tricky for a visit in Kevington?
In much of London, parking needs planning: a visitor permit or a nearby bay makes the day run more smoothly.
What do you put in the joint?
The product depends on the job: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
Do you work through snagging lists?
Yes. Send the list and a few photos of the sealant items. We’ll flag anything that needs another trade.
Where do you work from?
Our base is Crawley, with over 20 years’ experience. Our area covers South East England, London and Scotland.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator and we’re fully insured too.
Is there a guarantee?
Yes, always. There’s a 12-month guarantee on every job, large or small.
Are you fully insured?
Yes, we’re fully insured for every job we do.
When it isn’t the sealant
New sealant can’t fix everything, and we’d rather say so up front. It won’t solve:
- Settlement cracks that need a surveyor
- Damaged fittings that need replacing
- Leaking fittings rather than failed sealant
If you are not sure, just ring 0345 464 0079 or email us and we’ll give you a straight answer.
Surfaces we seal
- Show homes
- Windows & doors
- Kitchens
- Bathrooms & en suites
- Plot handovers
- Skirting & floors