Greater London · England
Remedial Sealant in Feltham
Removing failed, mouldy or leaking sealant and putting it right for Feltham, backed by a 12-month guarantee. Call for a quick quote.
- Gaps opening along the back of the worktop
- Mould trapped under a layer of silicone
- Sealant that came away because the surface wasn’t prepared
What affects the cost of remedial sealant
For a quick quote, just ask. What matters most is:
- Which sealant suits the joint
- Mould in or behind the old joints
- Any working-time requirements on site
- The old material and how stubborn it is
Combining jobs into one visit usually makes better use of the time than several visits, so tell us about everything that needs sealing. You’ll get one clear quote for the whole job.
What to tell us for a quote
There’s no need for technical detail. It helps if you can tell us:
- Where the job is, and your postcode
- The problem you’ve noticed
- The rough size of the job
- Any access issues, like height or stairs
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and email pictures if that’s easy.
Remedial sealant for homes and businesses in Feltham
Some sealant jobs aren’t a simple reseal, because someone has already had a go. Silicone laid over silicone, smears across tiles, the wrong product in a moving joint or mould trapped underneath all need stripping out before the joint can be done properly. If you have over-sealed joints coming away and products that weren’t meant for the joint, we can help, whatever the surface.
London’s water is hard, so limescale builds up along sealant lines, in grout and on fittings. In Feltham, remedial sealant is as much about a room looking cared for as about keeping water out.
Every job is covered by a 12-month guarantee, wherever you are in Greater London.
- Where
- Feltham (TW14, TW13)
- Region
- Greater London
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Other services in Feltham
The process
On the day, there’s very little for you to do. Show us the job and we’ll take it from there. The job generally takes a few hours for most joints, depending on how much old sealant has to come out, including the tidy-up. In a London area like Feltham, 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 work out whether the problem is the sealant, movement or a leak.
- Each layer is cut out and the residue cleaned off.
- We treat any mould and dry the joint thoroughly.
- The right product goes in, with backing where the joint moves.
- The joint is tooled and you are told about anything else we found.
Preparing for the visit
- Tell us about any previous sealing or DIY attempts
- For indoor joints, keep the area dry beforehand if you can
- Let us know about parking restrictions
Get a quote
There’s no standard price list. Instead, your job gets its own clear quote. To arrange one, call 0345 464 0079 or send us an email.
Advice
DIY sealant or a professional job?
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
How the job changes by surface
Worktops & kitchens
A loose worktop splits its sealant. That needs refixing before resealing, and we will tell you if we find it.
Windows & doors
Failed frame mastic is often hard, cracked and in several layers. We remove it all and clean back to sound surfaces before backing and resealing.
Common problems we fix in Feltham
All sealant wears out eventually. Over the years it shrinks, hardens and gets colonised by mould, faster where ventilation is poor. At that point it has to come out.
Keep an eye out for these signs:
- Beads that never stuck properly
- Torn expansion joints
- Over-sealed joints coming away
- Smears and lumps from a botched reseal
Rented homes near Feltham station change hands often, and failed or mouldy sealant is worth putting right between tenancies, before it turns into a leak.
Before booking anyone
- What product goes in the joint
- What happens if the job turns out different
- What insurance they hold
- Is VAT in the price?
Feltham questions
Do you work in hotels near Feltham?
Yes, hotels and guest houses are among the places we work. Rooms can be done a few at a time, so the building stays open.
Is parking a problem for a job in Feltham?
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.
How long should I leave it?
That depends on the sealant used, so follow the cure time we give you.
How do I get a quote for remedial sealant in Feltham?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote.
Do you work in Feltham?
Yes. We’re based in Crawley and work across South East England, London and Scotland, Feltham included.
What if the leak isn’t the sealant?
You’ll hear it from us. If it’s a cracked tray, a failed valve or a leaking waste, resealing will not fix it, so we won’t pretend it will.
Can you take off two layers of silicone?
Yes. We cut out all the layers and clean off the film, then the joint is resealed once.
Do I need to be at home?
We need access to the joints, so we will agree that with you when we book. For inside work, that normally means someone being in.
Why deal with it now?
A joint that has failed twice will fail again unless the cause is dealt with. Finding it, whether movement, water from elsewhere or an unsuitable product, ends the cycle. Converted houses in London often have a bathroom above someone else’s living room, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Dealing with it early is far simpler.
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. You’ll know the price before we begin.
Why choose Mr Mastic in Feltham
- 20+ years of sealant experience
- A sealant colour to suit the surroundings
- Any old sealant cut out fully, not covered over
- We agree the colour with you first
Read our cost guide or customer reviews.
Remedial sealant in Feltham: local notes
London has hard water, which leaves limescale on sealant, grout and taps, and it has to be cleaned off before new sealant goes in. 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.
For an older house near a landmark such as Christ Church, older homes can move a little, which is hard on rigid grout and tired sealant. Feltham is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Feltham is about 6 miles south-west of Ealing, in Greater London. Wherever you are in the TW14 postcode area, we cover remedial sealant for homes and businesses. We cover 764 towns and villages across Greater London, from the larger towns to small villages. You can also see our page for London, roughly 14 miles from Feltham.
Work in TW14 and TW13 works the same way as everywhere else we cover. Streets in the area include High Street, Railway Terrace and Sandycombe Road, all of which we cover. Feltham is on the A244 and B377, which makes it straightforward to reach. Neighbouring places we cover for remedial sealant include Bedfont (1 mile west), Hounslow (1 mile south-west), Hatton (1 mile north), Ashford Common (2 miles south-west) and Cranford (2 miles north). Larger places within reach include London (14 miles east), City of Westminster (12 miles east), Marylebone (12 miles north-east), Kensington (10 miles east), St Pancras (14 miles north-east) and Shoreditch (15 miles east).
Landmarks near Feltham
In Feltham, that means homes and buildings near Hounslow Heath, Moon On The Square pub and Rivers Academy West London, among other places. Feltham has its own railway station: Feltham station. Other landmarks nearby include Hounslow Hospital (2.3 miles north-east) and Kempton Steam Museum (1.6 miles south). Open spaces near Feltham include Richmond Hill and Pevensey Road Nature Reserve.
When something else is needed
Before you book, it’s worth knowing the limits:
- A tray or bath that is cracked
- Leaks from a shower valve, waste or pipework (a plumber’s job)
- A tray or worktop that needs refixing first
If you’re not sure, just phone 0345 464 0079 or send us an email and we’ll give you a straight answer before booking.
Surfaces we seal
- Failed movement joints
- Leaking tray & enclosure joints
- Botched or over-sealed joints
- Mouldy bath & shower sealant
- Shrunken worktop sealant
- Expansion joints