Greater London · England
New Build Mastic in Silvertown
New build mastic across Silvertown and nearby, with old sealant always removed completely.
- Gaps behind new kitchen upstands
- Joints pulling apart as timber shrinks
- Shower seals failing in the first year or two
FAQs for Silvertown
Can you help a landlord with a rental near Custom House station?
Yes, we work for landlords and agents. You can call 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before any work starts.
Is Silvertown in your area for new build mastic?
Yes. Our work covers London and the South East, and Silvertown is part of that. You can phone 0345 464 0079 or send us an email and tell us what needs doing, and we will send you a clear quote.
Can I do it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Who should fix failed sealant in a new build?
Start with the builder if you’re in the snagging or warranty period. If it is not resolved, we can reseal it properly.
Are you fully insured?
Yes. Full insurance covers our work.
Should I wait before resealing?
If the seal has failed and water is getting in, do it now. Small gaps that are just cosmetic can be resealed once movement has slowed.
Do I have to be there?
That depends on where the joints are. Inside work needs someone to give us access, and for outside work we will agree access with you when we book.
Why does sealant fail so quickly in new builds?
Lots of new homes see sealant crack early, because the house is drying and settling. Rushed application on dusty surfaces makes it worse.
About our new build mastic in Silvertown
Dust is the enemy of new-build sealant. We clean every joint thoroughly and prime where the surface and product need it, so the new bead bonds properly instead of bonding to the dust. We work on kitchens, skirting & floors and plot handovers, and the jobs we see most are worktop and upstand sealant coming away and plot mastic for developers ahead of handover.
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 failed shower seals, open skirting joints and gaps at thresholds are typical.
A 12-month guarantee comes as standard, so you are covered after we have gone.
- Location
- Silvertown (E16, SE10, SE7)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Quotes
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Towns and villages near Silvertown
What else we do in Silvertown
What affects the cost of new build mastic
We quote each job individually. These are the things that affect it:
- Whether there’s mould to deal with
- Working hours on commercial sites
- The number of rooms or windows
- The product the joint needs
Doing several joints on one visit generally makes better use of the time than several visits. We will send you a clear quote for the lot.
Helping us quote
To make quoting easier, please include:
- What the problem is, such as mould, gaps, leaks or cracking
- The rough size of the job
- Any previous sealing or DIY work
- Where the job is, and your postcode
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To get started, call 0345 464 0079 or send us an email.
What we do, step by step
You don’t need to clear the whole room or building before we come, just the space around the work. We protect the rest, and the job takes anything from a few hours to several days, depending on the number of plots in most cases. In a London area like Silvertown, 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.
- Each joint is checked for movement before we start.
- We remove the failed sealant and clean the joints.
- 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
- Mention any leaks or damp you’ve noticed
- Let us know about parking restrictions
- Mention if the joints have been sealed before
Get a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we’ll explain how we’d tackle it. Whenever you’re ready, phone 0345 464 0079 or drop us an email.
Read more
Joints and finishes in Silvertown homes
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Many of London’s new homes are flats in bigger developments, where snags may need reporting through the developer or the managing agent.
Silvertown is in London, so parking needs planning: let us know about parking bays, permits or a driveway. If you’ve bought a new home near Custom House station, the sealant around baths, showers and frames is worth checking in the first year or two.
Silvertown is about 1 mile south of Canning Town, in Greater London. If you need new build mastic in Silvertown, it’s easy to get a quote: please call 0345 464 0079 or drop us an email. We are based in Crawley and cover Greater London. Silvertown is one of 764 places in Greater London we cover.
Here we cover the E16, SE10 and SE7 postcode area for new build mastic. Streets in the area include Booth Road, Thames Road and Knights Road, all of which we cover. We also cover West Silvertown (1 mile north-west), Custom House (1 mile north), Royal Docks (1 mile north-east), Canning Town (1 mile north) and Limmo Peninsula (1 mile north-west). Larger places within reach include London (5 miles west), City of Westminster (8 miles west), Marylebone (8 miles west), Kensington (10 miles west), St Pancras (7 miles west) and Shoreditch (5 miles west).
Near you in Silvertown
Around Silvertown, our work takes us to homes and buildings near Anchor & Hope pub, Thames Barrier Park and The Royal Docks Community School, among other places. For rail, the closest station is Custom House station, roughly 0.7 miles north. Well-known places in the area include Charlton Athletic Museum (1 mile south) and Gallions Reach Shopping Park (2.3 miles east). The countryside around Silvertown includes Tower Hill and Gilbert's Pit.
DIY sealant or a professional job?
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
Why it’s worth doing now in Silvertown
DIY kits do not solve the main problems with new-build sealant: dust, no primer and old sealant left in the joint. Cutting out, cleaning and priming are what make the difference. Damp from a failed joint spreads quietly in older London brickwork and timber, and by the time it shows on a wall or ceiling in Silvertown, the repair is bigger than the sealant job would have been.
No two jobs are quite the same, so we quote each one individually. Size, access and the product the joint needs all play a part.
Why choose Mr Mastic in Silvertown
- Old sealant always removed completely
- Experience in homes, commercial sites and hotels
- Quality sealants from Arbo and Everbuild
- White, clear, grey or coloured to suit, where the product allows
Read what affects the cost and customer reviews.
What we can’t put right
Sealant isn’t the answer to every problem, and we’d rather say so up front. Sealant won’t put right:
- Plumbing faults behind the sealant
- Cracking that points to a structural problem
- A tray or bath that isn’t properly supported, until it’s fixed
If in doubt, call 0345 464 0079 or email us and we’ll say what we think before you book.
Joints and surfaces we work on
- Kitchens
- Bathrooms & en suites
- Show homes
- Plot handovers
- Skirting & floors
- Windows & doors
Landlords, agents and businesses in Silvertown
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Landlords and agents in Silvertown can book us as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order.
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Ventilate bathrooms well, especially in the first year
- Get a leaking seal dealt with straight away
- Record problems with dated pictures
- Clean sealant with mild detergent, not abrasives
Keep photos of the joints and any snagging correspondence with your builder. It’s useful if you need to raise other issues later.
Early snagging is easier snagging. Small faults turn into leaks if left in a busy bathroom.