Greater London · England
New-build mastic & snagging in Bopeep, Greater London
Our applicators work in Bopeep on plot mastic for developers and snagging failed sealant in new homes. Old material cut out, joints cleaned and sealed neatly and a one-year guarantee.
- Sealant that never bonded to the surface
- Skirting joints opening in the first winter
- Cracked sealant around new window and door frames
What affects the cost of new build mastic
Jobs vary more than people expect. The main factors:
- Which sealant suits the joint
- How many areas need sealing
- When we can work, for business premises
- How much there is to do
We don’t show prices on the website, because each job is priced on what it involves. Call for a quick quote.
What we need to know
When you contact us, it’s useful to know:
- Any access issues, like height or stairs
- Where the job is, and your postcode
- If it’s domestic, commercial or a hotel
- Roughly how big the job is
To get a quote, ring 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You’ll have a clear quote before any work starts.
New build mastic for homes and businesses in Bopeep
We carry out plot mastic and second-fix sealing for builders, and snagging reseals for new-home owners. In both, preparation makes the difference. If you have new-build shower sealant that has already split and sealant work across a run of new homes, we can put it right, on kitchens, show homes and skirting & floors alike.
From brand-new flats to converted terraces with new flooring, London has every kind of floor. Wherever a floor meets a wall, a skirting or a threshold, the joint has to allow for movement, in Bopeep as anywhere.
You are covered for a year from the day we finish. If there’s a problem with it, please phone 0345 464 0079 or email us.
- Location
- Bopeep (BR6)
- Wider area
- Greater London
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Honest limits
To be straight with you, some problems need a different trade:
- Structural cracks in walls or ceilings
- Cracked trays, tiles or worktops
- A tray or bath that isn’t properly supported, until it’s fixed
If you are not sure, just ring 0345 464 0079 or drop us an email and we will give you a straight answer before booking.
Surfaces we seal
- Show homes
- Windows & doors
- Bathrooms & en suites
- Kitchens
- Plot handovers
- Skirting & floors
How the visit works
The work is kept neat and contained to the area we’re working on. The job normally takes anything from a few hours to several days, depending on the number of plots, and we explain the cure time before we leave. In Bopeep, as in most of London, parking needs a little planning. It helps if you can point us to a visitor permit or a bay close to the door.
- We look at why each joint failed, including any movement.
- Old sealant is cut out and the joints cleaned.
- Joints are dried and primed where the product calls for it.
- 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.
Preparing for the visit
- Plan for the work area to be out of bounds to pets and children
- Let us know about stairs, lifts or work at height
- Tell us if parking is tricky
How to get a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we will explain how we’d tackle it. When it suits you, ring 0345 464 0079 or drop us an email.
Related advice
What we are called out for in Bopeep
Once people move in, baths and trays take weight and bed down. A bath sealed empty drops slightly when filled, straining the joint and the sealant may split.
Common reasons people contact us include:
- Frame joints opening as the plaster dries
- Sealant that never bonded to the surface
- Leaking shower tray seals in a new home
- Worktop and upstand sealant coming away
Bopeep is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Before booking anyone
- What happens if the job turns out different
- What insurance they hold
- How long the guarantee is
- Which sealant they’ll use, and why
Other services in Bopeep
DIY sealant or a professional job?
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 fails, we can still redo it.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
Keeping the joints in good condition
How long the joints last depends on use and care. We suggest:
- Ventilate bathrooms well, especially in the first year
- Report sealant problems to your builder during the snagging period
- Record problems with dated pictures
- Do not wait for the house to settle if water is getting through
Leave the sealant for the cure time we give you before showering or bathing. Most silicones need around a day before water reaches them.
If a shower tray or bath seal splits in the first year, look for movement. Have it resealed, and the tray or bath checked, before it gets worse.
What new build mastic looks like in Bopeep
Many of London’s new homes are flats in bigger developments, where snagging may go through the developer or managing agent. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you’ve bought a new home near Knockholt station, the sealant around baths, showers and frames is worth checking in the first year or two.
Bopeep is about 3 miles south-east of Orpington, in Greater London. For new build mastic in and around Bopeep, it’s easy to get a quote: please call 0345 464 0079 or drop us an email. We’re based in Crawley and cover Greater London. Our area takes in 764 places across Greater London. For nearby work, see our London page.
Work in BR6 is quoted and booked the same way as anywhere else. New build mastic is available to properties on Shoreham Lane and Hewitts Road and the roads around them. Close by, we work in Maypole (1 mile north), Well Hill (1 mile north-east), Chelsfield (1 mile north-west), Badgers Mount (1 mile south) and Pratt's Bottom (1 mile south-west). Larger places within reach include London (14 miles north-west), Shoreditch (15 miles north-west), Whitechapel (15 miles north-west), Stockwell (14 miles north-west), Orpington (3 miles north-west) and Plaistow (13 miles north-west).
Around Bopeep
In Bopeep, that means homes and buildings near St Olave's and St Saviour's Grammar School, The Bo-Peep pub and Hewitt's Chalk Bank. The closest station to Bopeep is Knockholt station, roughly 0.6 miles south-west of the centre. Well-known places in the area include London Borough of Bromley Museum (2.4 miles north-west) and Lullingstone Castle (2.5 miles east). Open spaces near Bopeep include The Warren.
Common questions in Bopeep
Is parking a problem for a job in Bopeep?
Parking in Bopeep, as in most of London, takes a little planning: a visitor permit or a bay close to the door helps a lot.
Can you help a landlord with a rental near Knockholt station?
Yes, rental work is part of what we do. Just call 0345 464 0079 or email us and tell us about the property, and we will give you a clear price.
Can I add another job to the visit?
Yes. More than one area can go on one quote.
How long should I leave it?
Many sealants skin over quickly but take longer to cure fully. We will give you the cure time for the product we used before we leave.
Where do you work from?
Mr Mastic is based in Crawley. Our applicators cover Bopeep.
Can you reseal over the builder’s sealant?
No. The old sealant is cut out fully, then clean and prime the joint, before resealing.
When is the best time to reseal in a new build?
Where water is getting through, don’t wait. Small gaps that are just cosmetic can be resealed once movement has slowed.
Do the sealants smell?
That depends on the sealant. Some products have a noticeable smell, others very little.
Different surfaces, different methods
Kitchens
Beside the sink, the joint takes water every day. We use a sealant suited to kitchens suited to the job.
Plot handovers
Good preparation at handover saves snagging later. Dust from the build is removed first and prime where the product needs it.