Greater London · England
Gunnersbury Remedial Sealant
Removing failed, mouldy or leaking sealant and putting it right for homes and businesses in Gunnersbury and across Greater London. Fully insured, ARBOMaster approved and guaranteed for a year.
- Dark patches showing through the sealant
- Sealant that came away because the surface wasn’t prepared
- Floor or wall movement joints that have failed
Remedial sealant in Gunnersbury, done properly
Two decades of sealant work means we recognise most failures quickly. We’re ARBOMaster approved and fully insured, and remedial work carries our one-year guarantee. If you have sealant applied over old sealant that has lifted and wide, uneven beads that look worse than the old ones, we can help.
London homes include a lot of flats, conversions and mansion blocks, so a bathroom is often directly above a neighbour’s ceiling. In Gunnersbury, that’s a good reason to put tired sealant and grout right early.
A 12-month guarantee comes as standard, so you are not left on your own once the job is done.
- Place
- Gunnersbury (W4, W3, TW8)
- Region
- Greater London
- Guarantee
- A year, on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
What happens on the day
Before we leave, we go over the finished joints with you. The visit itself generally takes a few hours for a typical bath or shower, longer where several layers have been applied, depending on the size of the job. In Gunnersbury, 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.
- First we work out whether the problem is the sealant, movement or a leak.
- Old beads and residue are removed down to clean surfaces.
- Mould is treated and the joint dried.
- The right product goes in, with backing where the joint moves.
- We finish neatly and point out anything that needs another trade.
Before we arrive
- On commercial sites, let us know about site rules
- For indoor joints, keep the area dry beforehand if you can
- Tell us about any water getting in
How to get a quote
For remedial sealant in Gunnersbury, call 0345 464 0079 or send us an email. Tell us what the problem is and where, and we will agree the price before any work begins.
Related advice
Remedial sealant in Gunnersbury: local notes
London has a lot of flats and conversions, and a failed shower or bath seal in one can show up on the ceiling below, which is why it’s worth fixing early. London’s water is hard, so limescale builds up on sealant, grout and fittings.
If you let a flat or house near Gunnersbury station, failed or mouldy sealant is worth putting right between tenancies, before it turns into a leak. If you look after a building such as Strand-on-the-Green Junior School, we reseal washrooms and kitchens in schools and businesses as well as homes.
Gunnersbury is about 1 mile south of Acton, in Greater London. Gunnersbury gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Our area takes in 764 places across Greater London, from the larger towns to small villages. You can also see our page for London, about 8 miles away.
Every address in W4, W3 and TW8 is within our area for remedial sealant. You’ll find streets such as Kew Road, Kent Road and Power Road. With the A3000 close by, Gunnersbury is simple for us to get to for remedial sealant. If you’re just outside Gunnersbury, we cover Strand-on-the-Green (1 mile south), Kew (1 mile south), Grove Park (1 mile south-east), Chiswick (1 mile east) and Turnham Green (1 mile south-east). Within a short drive, we also cover London (8 miles east), City of Westminster (6 miles east), Marylebone (6 miles east), Kensington (3 miles east), St Pancras (7 miles east) and Shoreditch (9 miles east).
What’s near Gunnersbury
Around Gunnersbury, our work takes us to homes and buildings near Clayton Hotel Chiswick, Kew College Prep and Ark Acton Academy, among other places. Other local landmarks include Turnham Green (0.5 miles east) and Library for Iranian Studies (1 mile north). Gunnersbury has its own railway station: Gunnersbury station. A little further out are Barnes Hospital (2 miles south-east) and Livat Hammersmith (2.1 miles east). The countryside around Gunnersbury includes Kew Gardens Lake and Castlebar Hill.
Nearby places to Gunnersbury
Other services in Gunnersbury
When to call us in Gunnersbury
Silicone only bonds to surfaces that are clean and dry. Residue, moisture or dust left in the joint weaken the bond, so it starts lifting sooner than it should.
Common reasons people contact us are:
- Worktop sealant that has shrunk and split
- Products that weren’t meant for the joint
- Repeat leaks from the same joint
- Sealant that came away because the surface wasn’t prepared
If you live in an older home near St Michael's Church, walls and floors in older homes can move, and sealant and grout show it first.
Comparing quotes
- Whether all the old sealant comes out first
- How long to leave it before use
- How long the guarantee is
- What happens if the job turns out different
Gunnersbury: your questions answered
Is parking an issue for remedial sealant in Gunnersbury?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot.
Do you take on hotel work around Gunnersbury?
Yes. Hotel and guest-house work is part of what we do. Work can be planned room by room, and out-of-hours working can be arranged.
Can old silicone be taken off without scratching the tiles?
Yes. The old bead is cut and lifted with tools that suit the surface, then clean off the residue. We point out any damage that is already there.
Will it make a mess?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
Someone resealed my shower and it’s leaking again. Can you help?
Yes, normally. We check it’s the sealant and not the tray, valve or waste, then the joints are stripped and resealed.
Can you quote for more than one area?
Yes, we can. Several rooms, windows or areas can go on one quote.
How long should I leave it?
Most sealants are touch-dry well before they’re fully cured. We will tell you how long to leave the joint.
How do I get a quote for remedial sealant in Gunnersbury?
We do not publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. You will get a clear quote before we start.
What happens if it’s left?
Repeat failures have a cause. Finding it, whether movement, water from elsewhere or an unsuitable product, ends the cycle. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and by the time it shows on a wall or ceiling in Gunnersbury, the repair is bigger than the sealant job would have been.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
Why us?
- An ARBOMaster approved applicator
- Trusted Arbo and Everbuild sealants
- We agree the colour with you first
- Every job guaranteed for a year
Surface by surface
Movement & expansion joints
Some movement joints have been filled with mortar or grout. We rake that out where it can be removed and seal with a flexible product.
Worktops & kitchens
If a worktop moves when you lean on it, the sealant will keep splitting. It needs fixing down first, which we will point out.
Looking after it afterwards
A little care helps the new joints last. Our advice:
- Keep movement joints clear of mortar and paint
- Report a tray that rocks or a worktop that lifts
- Ask why a joint failed before redoing it
- Keep the room well ventilated
Don’t let anyone seal over it later. Over-sealing is how many remedial jobs start.
Warning signs: peeling layers, mould showing through the bead, leaks after showering or cracks in a movement joint. Any of them means it’s time for remedial work.
Quotes for remedial sealant in Gunnersbury
We do not publish a price list. What we look at:
- Any mould that needs treating
- The old material and how stubborn it is
- When we can work, for business premises
- The number and length of the joints
We do not show prices on the website, because each job is priced on what it involves. Call for a quick quote.
What we need to know
You do not need to know the technical terms. Just tell us:
- How many joints, rooms or windows are involved
- Where the job is, and your postcode
- Any previous sealing or DIY work
- A few pictures by email, if you can
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is. Whenever you’re ready, call 0345 464 0079 or email us.
Can I do it myself?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
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.