Greater London · England
Remedial sealant & repairs in Silvertown, Greater London
Remedial sealant across Silvertown and nearby, with every bit of old sealant taken out first.
- Wide, uneven beads that look worse than the old ones
- Dark patches showing through the sealant
- Caulk or the wrong sealant used in a wet area
How we handle remedial sealant in Silvertown
With more than 20 years’ experience, our applicators have seen most of the ways sealant can fail. We’re fully insured ARBOMaster approved applicators, and remedial work carries our one-year guarantee. Common call-outs are for leaks that keep coming back after resealing and worktop sealant that has shrunk and split, across leaking tray & enclosure joints, failed movement joints and botched or over-sealed joints.
Across London, a large share of homes are flats, conversions or mansion blocks, so a bathroom is often directly above a neighbour’s ceiling. In Silvertown, that is a good reason to put tired sealant and grout right early.
All of our work is guaranteed for twelve months.
- Place
- Silvertown (E16, SE10, SE7)
- Region
- Greater London
- Cover
- A year, on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Landlord and commercial work in Silvertown
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Hotels need rooms back in use, so the work can be planned room by room. Hotel work is part of what we do, alongside homes and businesses.
Remedial sealant in Silvertown: local notes
There are hotels and other places to stay in and around Silvertown. As well as homes, we work in hotel bathrooms, where resealing and regrouting can be done room by room. In a London flat, water from a failed bath or shower seal can reach the neighbours below, so tired sealant is best dealt with early.
For an older house near a landmark such as St Barnabas' Church, timber floors under older bathrooms flex, so joints need a sealant that moves with them. Letting a property close to Custom House station? Then failed or mouldy sealant is worth putting right between tenancies, before it turns into a leak.
Silvertown is about 1 mile south of Canning Town, in Greater London. Whether you are in the middle of Silvertown or further out, we cover remedial sealant for every kind of property, from flats and houses to offices and hotels. Our Greater London coverage runs to 764 places, Silvertown among them.
We cover every part of E16, SE10 and SE7 for remedial sealant. If you need remedial sealant at a property on Booth Road, Thames Road and Knights Road or a nearby road, we can help. We also cover the places around Silvertown: 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).
Landmarks near Silvertown
In Silvertown, that means homes and buildings near Anchor & Hope pub, Thames Barrier Park and The Royal Docks Community School, among other places. Silvertown’s nearest station is Custom House station, about 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). Open spaces near Silvertown include Tower Hill and Gilbert's Pit.
Different surfaces, different methods
Worktops & kitchens
Kitchen joints often have grease and cleaning residue deep in them, so cleaning takes longer than in a bathroom before resealing.
Windows & doors
Smeared or badly matched mastic can be cut out and redone neatly, in a colour that suits the frame.
Towns and villages near Silvertown
Other services in Silvertown
Questions from Silvertown
I live in a flat in Silvertown. Can a failed seal leak into the flat below?
Yes, and the first sign is often a stain on the ceiling below. A proper reseal before the leak starts is the easy fix.
Is parking a problem for a job in Silvertown?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot.
Does someone need to be in?
We need access to the joints, so we’ll agree that with you when we book. Indoors, that normally means someone at home.
Will the old sealant be removed?
Yes. Sealing over old sealant is the main reason resealing fails early, so we never do it.
My shower still leaks after a reseal. Can you sort it?
Yes, usually. We check it’s the sealant and not the tray, valve or waste, then strip and reseal the joints.
When is the sealant fully cured?
That depends on the sealant used, so please follow the time we give you.
Can you take off two layers of silicone?
Yes. Each layer is cut out and the residue cleaned off, then the joint is resealed once.
Is there any odour?
Sometimes, a little. Any smell clears as the sealant cures.
How to look after the new joints
How long the joints last depends on use and care. Here’s what we suggest:
- Keep the room well ventilated
- Have loose fittings fixed before resealing
- Find out why the sealant failed first
- Act on a lifting corner straight away
Give the new sealant its full cure time: follow the cure time we give you.
Signs to act on: sealant lifting at the ends, a second bead visible on top of the first, black mould under the silicone, or stains below a bathroom. Any of them means it’s time for remedial work.
Why act early in Silvertown
Mould under a bead can’t be reached by cleaning. Removal is the only way to get at it. In London conversions, one flat’s bathroom is often above another flat’s ceiling, and a slow leak from a failed seal can end up in the flat below. Dealing with it early is far simpler for homes in Silvertown.
Leaving a failed joint usually makes the job bigger, not smaller, as water and mould keep getting in. If you are unsure, phone 0345 464 0079 or send us an email and we will give you an honest view and a quote.
Why choose Mr Mastic in Silvertown
- Trusted Arbo and Everbuild sealants
- Full insurance on every job
- One-year guarantee on every job
- Over 20 years’ experience
Take a look at our cost guide and our reviews.
The process
We work through the job in order: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours for a typical bath or shower, longer where several layers have been applied, and the area is left clean. In a London area like Silvertown, the main things to plan are parking and access: tell us about permits, visitor bays or off-street space, which floor we are working on and whether there’s a lift.
- First we find out how and where the joint has failed.
- All the old sealant comes out, including any layers underneath.
- The joint is cleaned, treated for mould and left to dry.
- Where the joint moves, backing and a flexible sealant suited to the movement go in.
- Finally we finish the joint and talk you through what we found.
Preparing for the visit
- Mention if the joints have been sealed before
- For indoor joints, keep the area dry beforehand if you can
- Mention any parking rules near the property
How to get a quote
To get a quote, ring 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We will give you a clear price before any work starts.
Advice
What sealant work can’t fix
We will not take on work that will not last, so these are the limits:
- Plumbing leaks behind walls or under trays
- A tray or bath that is cracked
- Sealant in an older building that needs testing for asbestos first
If you are not sure, just phone 0345 464 0079 or send us an email and we will give you a straight answer.
What we seal
- Failed movement joints
- Shrunken worktop sealant
- Mouldy bath & shower sealant
- Botched or over-sealed joints
- Leaking tray & enclosure joints
- Expansion joints
Signs you need remedial sealant in Silvertown
All sealant wears out eventually. Mould grows into the silicone, the surface hardens and the bead shrinks, faster where ventilation is poor. At that point it has to come out.
The most common problems we see are:
- Decorators’ caulk around a bath or shower
- Sealant that came away because the surface wasn’t prepared
- A shower that leaks however often it’s resealed
- Gaps opening along the back of the worktop
Silvertown is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Before booking anyone
- What product goes in the joint
- How the joint is cleaned and prepared
- Who turns up on the day
- Which colour the sealant will be