Greater London · England
Remedial Sealant in Dollis Hill
Remedial sealant for Dollis Hill, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Caulk or the wrong sealant used in a wet area
- Kitchen joints letting water behind the worktop
- Sealant peeling off a dusty or damp surface
Landlords, agents and businesses in Dollis Hill
Landlords and letting agents in Dollis Hill can book us as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we will give you a quote.
Remedial sealant in Dollis Hill, done properly
Decorators’ caulk in a shower, bathroom silicone on a window, a rigid filler in a movement joint fails however neatly it’s applied. We take it out and use a sealant made for that joint. If you have repeat leaks from the same joint and caulk or the wrong sealant used in a wet area, we can help.
Much of London’s older housing is Victorian and Edwardian terraces, many of them now split into flats, and bathrooms were often squeezed into small rooms. Small, steamy rooms are where mould gets into sealant and grout fastest, and homes in Dollis Hill are no different.
Every job comes with our one-year guarantee.
- Place
- Dollis Hill (NW2, NW10, NW9)
- Wider area
- Greater London
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What the job involves on each surface
Windows & doors
Some leaks around windows come from the wall or the window itself. If the frame joint is not the cause, we will say so.
Worktops & kitchens
Kitchen joints hold grease and residue, so cleaning takes longer than in a bathroom before resealing.
Can I do it myself?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
The process
We work through the job in order: protection first, then preparation, sealing and a tidy-up. For most jobs that takes a few hours, depending on how many layers have to come out. In Dollis Hill, flats, stairs and shared entrances are part of the routine. If the building has a concierge, managing agent or access rules, tell us when you book.
- The failure is looked at first, so we know whether it’s sealant, movement or water from elsewhere.
- Each layer is cut out and the residue cleaned off.
- 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
- Tell us about any water getting in
- Where the joints are inside, avoid wetting them before we arrive
How to get a quote
Every job is quoted individually. Just call 0345 464 0079 or send us an email with the details, and pictures are welcome.
Advice
Also near Dollis Hill
What else we do in Dollis Hill
Why act early in Dollis Hill
Remedial work takes longer than a straight reseal, but not by much: it takes a few hours for most joints, depending on how much old sealant has to come out. It’s far less disruption than resealing the same joint again and again. In a London flat, a failed joint rarely stays your problem alone: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote.
Why choose Mr Mastic in Dollis Hill
- Approved under the ARBOMaster scheme
- Over 20 years’ experience
- Arbo and Everbuild products
- We leave the area clean and tidy
Take a look at what affects the cost or our reviews.
How to look after the new joints
After the cure time, these simple habits help:
- Don’t add new sealant on top of old
- Air the bathroom so the sealant can dry
- Check ceilings under showers for marks
- Check trays and worktops don’t move
Ventilation keeps mould away from the new bead: use the extractor or open a window after showering.
Mould trapped under over-sealed joints spreads unseen. When it finally shows, the whole bead needs to come out.
Dollis Hill: your questions answered
I live in a flat in Dollis Hill. Can a failed seal leak into the flat below?
Yes. In a flat, water from a failed bath or shower seal has only one way to go, and that is down. Cutting out the old sealant and laying a new bead early stops it getting that far.
Can you help a landlord with a rental near Brent Cross West station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. You can call 0345 464 0079 or drop us an email with the details for a clear quote.
Where do you work from?
We’re a Crawley-based firm. Our area covers South East England, London and Scotland.
Do you fix expansion and movement joints?
Yes. The depth is set with backing so the sealant only bonds to the two sides, which lets it stretch.
Can you do several jobs on one visit?
Yes. Several rooms, windows or areas can go on one quote.
Is remedial work guaranteed?
Yes, for 12 months. If we have pointed out another problem, getting it fixed helps the new joint last.
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.
How do I get a quote for remedial sealant in Dollis Hill?
Every job is different, so each one gets its own quote. For a quick quote, ring 0345 464 0079 or drop us an email with a short description of the job.
Bathrooms and kitchens in Dollis Hill
Dollis Hill has hotels and guest accommodation nearby. 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.
If you look after a building such as Our Lady of Grace Catholic Junior School, washroom and kitchen sealant there needs the same care as at home, and schools and businesses are part of our work as well as homes. Dollis Hill is in London, so parking needs planning: let us know about parking bays, permits or a driveway. If you let a flat or house near Brent Cross West station, failed or mouldy sealant is worth putting right between tenancies, before it turns into a leak.
Dollis Hill is about 1 mile north-east of Neasden, in Greater London. Across the NW2 area, our applicators can take on remedial sealant. 764 places in Greater London are on our list. For nearby work, see our London page.
Work in NW2, NW10 and NW9 works the same way as everywhere else we cover. You’ll find streets such as Brook Road, Lane Close and Crest Road. We also cover the places around Dollis Hill: Staples Corner (1 mile north-east), Neasden (1 mile south-west), Cricklewood (1 mile south-east), Willesden (1 mile south) and Brent Cross (1 mile north-east). We also work in nearby towns such as London (7 miles south-east), City of Westminster (5 miles south-east), Marylebone (5 miles south-east), Kensington (5 miles south), St Pancras (6 miles south-east) and Shoreditch (7 miles east).
Near you in Dollis Hill
We work in homes and buildings around Woodfield School, The Crown Public House and Gladstone Park. Dollis Hill has its own railway station: Brent Cross West station. A little further out are Brent Cross Shopping Centre (1 mile north-east) and St Andrew's Hospital (within half a mile south). Not far away are Darland's Lake and Parliament Hill.
What affects the cost of remedial sealant
You’ll get a clear quote before work begins. It takes into account:
- How much old sealant there is and how hard it is to remove
- The number of rooms or windows
- Access and height
- The number and length of the joints
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you are unsure, ring 0345 464 0079 or send us an email and we’ll give you an honest view and a quote.
What to tell us for a quote
Before you ask for a quote, have a think about:
- What the problem is, such as mould, gaps, leaks or cracking
- The type of property
- Roughly how big the job is
- The address or postcode of the job
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we’ll talk you through what we’d do. Whenever you are ready, call 0345 464 0079 or send us an email.