Greater London · England
New Build Mastic in Mitcham
Professional new build mastic in and around Mitcham, with every bit of old sealant taken out first and a one-year guarantee.
- Gaps between new skirting and floors
- Smeared, uneven beads picked up at snagging
- Sealant work across a run of new homes
What we cannot put right
We’ll always be straight with you, so here’s what sealant cannot fix:
- Leaking fittings rather than failed sealant
- Baths and trays that move too much for sealant to cope with
- Broken tiles or a split tray
If you are not sure, just ring 0345 464 0079 or email us and we’ll give you a straight answer.
Where we work in Mitcham
- Kitchens
- Plot handovers
- Show homes
- Skirting & floors
- Windows & doors
- Bathrooms & en suites
New build mastic for homes and businesses in Mitcham
A new house keeps drying out and settling for its first couple of years. Timber shrinks, plaster dries and baths and trays bed down, so sealant that was laid quickly before handover often cracks. We work on plot handovers, skirting & floors and kitchens, and the jobs we see most are sealant applied over dusty or wet surfaces and joints pulling apart as timber shrinks.
Across London, commercial floors have movement joints that break down under heavy foot traffic, and new homes need their plot mastic finished properly before handover, in Mitcham and beyond.
Each job carries a 12-month guarantee.
- Place
- Mitcham (CR4, SW16, SM4)
- Region
- Greater London
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What we do, step by step
We keep the work tidy and contained to the area we’re working on, so you can carry on as normal. The job usually takes anything from a few hours to several days, depending on the number of plots, and we tell you how long to leave it before we go. In a London area like Mitcham, the main things to plan are parking and access: let us know about parking, the floor we’ll be working on and any lift or shared entrance.
- First we work through your snagging list or plot schedule with you.
- The old bead comes out in full, with no layer left behind.
- We clean off dust from the build and prime the surfaces where the product needs it.
- New sealant suited to each joint is applied and tooled neatly.
- Finally, each room is checked and you’re given the cure time.
Before we arrive
- Mention any parking rules near the property
- Mention any leaks or damp you’ve noticed
- Let us know about earlier repairs to the joints
Ask for a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email pictures if that is easy.
Related advice
Why deal with it now?
Running a new bead over the builder’s sealant might look tidy for a few weeks, but it cannot bond to what’s underneath. Taking it all out and starting again is the only way to get a lasting seal. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and once it shows in Mitcham, the repair is bigger than a sealant job.
Combining jobs into one visit usually makes better use of the time than several visits. We will send you a clear quote for the lot.
Why choose Mr Mastic in Mitcham
- 180+ five-star Google reviews
- Neat joints and a tidy finish
- Sanitary silicone with an anti-fungal additive in wet areas
- Quality sealants from Arbo and Everbuild
Read how sealant jobs are priced and customer reviews.
What new build mastic looks like in Mitcham
Much of London’s new housing is flats in larger developments, where snags may need reporting through the developer or the managing agent. 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.
If you’ve bought a new home near Mitcham Eastfields station, the sealant around baths, showers and frames is worth checking in the first year or two. As a London address, Mitcham can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Mitcham is about 2 miles west of Thornton Heath, in Greater London. Jobs in Mitcham get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Mitcham is one of 764 places in Greater London where we work for new build mastic. We also work in London, about 7 miles from Mitcham.
All of CR4, SW16 and SM4 is within our area for new build mastic. New build mastic is available to properties on Kings Road, Baker Lane and Manor Road and the roads around them. We also cover Hackbridge (1 mile north), Eastfields (1 mile north), Colliers Wood (1 mile north-west), Merton Abbey (2 miles north-west) and Furzedown (2 miles north). Further out, we also cover London (7 miles north), City of Westminster (8 miles north), Marylebone (8 miles north), Kensington (7 miles north), St Pancras (9 miles north) and Shoreditch (9 miles north).
Landmarks near Mitcham
In Mitcham, that means homes and buildings near The Archbishop Lanfranc School, St Mark's Church of England Academy and The White Lion of Mortimer pub, among other places. Mitcham’s nearest station is Mitcham Eastfields station, roughly 0.5 miles north of the centre. Nearby you will also find Wandle Industrial Museum (0.7 miles west) and Centrale Croydon (2.7 miles south-east). Not far away are Duppas Hill and Cranmer Green.
Also near Mitcham
Also in Mitcham
Work for landlords, hotels and businesses
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. We can quote for more than one property at once.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
What affects the quote in Mitcham
Jobs vary more than people expect. What affects the quote:
- Any working-time requirements on site
- How many areas need sealing
- Whether old sealant or filler has to be cut out
- Whether the work is at height
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference.
Asking for a quote
To help us quote quickly, please include:
- Pictures of the joints, sent by email
- Access, such as stairs, a lift or height
- If someone has resealed it before
- Where the property is
Getting a quote is simple: tell us what needs doing and where. A few pictures by email make the job easier to understand.
Mitcham questions
Is parking a problem for a job in Mitcham?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. The visit is then planned around what’s available.
I let a flat near Mitcham Eastfields station. Can you help?
Yes, we work for landlords and letting agents. Just call 0345 464 0079 or email us and tell us about the property, and we’ll give you a clear price.
Can you work on commercial sites?
Yes. Hotels, offices and other businesses use us, and we are fully insured.
Do you have insurance?
Yes. We are fully insured, with over 20 years’ experience in sealant work.
Is there any odour?
Sometimes, a little. Any smell clears as the sealant cures, and ventilation helps.
Should I wait before resealing?
Where water is getting through, don’t wait. Small gaps that are just cosmetic can be resealed once movement has slowed.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator and we’re fully insured too.
Which products do you use?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We explain the product when we quote.
Keeping the joints in good condition
No joint lasts for ever, but care makes a real difference. A few tips:
- Record problems with dated photos
- Watch for new gaps as the house dries out
- Wait for the cure time before using a resealed shower
- Report sealant problems to your builder during the snagging period
Keep photos of the joints and any snagging correspondence with your builder. It’s useful if you need to raise other issues later.
A failed seal in a new home lets water into joists, plasterboard and ceilings. Early resealing keeps the job small and the new finishes intact.
DIY sealant or a professional job?
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly.
If you are 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 does not work out, we can still put it right.