Greater London · England
Dartmouth Park Remedial Sealant
Removing failed, mouldy or leaking sealant and putting it right for homeowners, landlords and businesses in Dartmouth Park. Fully insured, ARBOMaster approved and guaranteed for a year.
- Dark patches showing through the sealant
- Decorators’ caulk around a bath or shower
- Sealant peeling off a dusty or damp surface
Remedial sealant in Dartmouth Park
Some sealant jobs are not a simple reseal, because someone has already had a go. New sealant over old, smeared beads, unsuitable products and hidden mould all need stripping out before the joint can be done properly. We work on mouldy bath & shower sealant, leaking tray & enclosure joints and shrunken worktop sealant, and the jobs we see most are a shower that leaks however often it’s resealed and sealant applied over old sealant that has lifted.
London’s water is hard, so limescale builds up along sealant lines, in grout and on fittings. For a bathroom or kitchen in Dartmouth Park, getting the joints right keeps water where it belongs and the room looking clean.
The work is guaranteed for twelve months. If something is not right with it in that time, tell us and we’ll put it right.
- Location
- Dartmouth Park (NW5, N19, N7)
- Region
- Greater London
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
What we can’t put right
Before booking, it’s worth knowing the limits:
- A tray or worktop that needs refixing first
- A leaking trap, valve or supply pipe
- A cracked shower tray or bath (that needs repair or replacing)
Not sure which it is? You can call 0345 464 0079 or drop us an email and we’ll tell you honestly before booking.
Joints and surfaces we work on
- Expansion joints
- Botched or over-sealed joints
- Failed movement joints
- Mouldy bath & shower sealant
- Shrunken worktop sealant
- Leaking tray & enclosure joints
What happens if it’s left?
It’s easy to scratch acrylic, enamel or an uPVC frame cutting out old sealant, and the residue left behind stops the next bead bonding. Careful stripping is where most of our time goes. 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.
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs, along with when we can work on site. Ask us for a quote and we’ll go through it with you.
Why us?
- Homes, businesses and hotels
- ARBOMaster approved applicator
- White, clear, grey or coloured to suit, where the product allows
- Quality sealants from Arbo and Everbuild
See our cost guide or what customers say.
Looking after it afterwards
A little care helps the new joints last. Our advice:
- Deal with small splits early
- Check ceilings under showers for marks
- Report a tray that rocks or a worktop that lifts
- Never seal over old silicone
Give the new sealant its full cure time: generally around 24 hours, or as long as we advise.
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. Each one is worth getting looked at.
Dartmouth Park: your questions answered
Do you take on hotel work around Dartmouth Park?
Yes, we work for hotels as well as homes and businesses. Rooms can be done a few at a time, so the building stays open.
Is parking a problem for a job in Dartmouth Park?
In much of London, parking needs planning: a visitor permit or a nearby bay makes the day run more smoothly, so mention what’s available when you book.
Can you do several jobs on one visit?
Yes, we can. Several rooms, windows or areas can go on one quote.
Can I choose the sealant colour?
Most of the time, yes. We’ll tell you which colours the right product comes in and agree one before we start.
Should I try DIY first?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
Does remedial work come with a guarantee?
Yes, with our one-year guarantee. 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 remove every layer; over-sealing fails because silicone will not bond to silicone.
Do I have to be there?
We need access to the joints, so we’ll agree that with you when we book. Indoors, that usually means someone at home.
Work for landlords, hotels and businesses
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. We can quote for more than one property at once.
What affects the cost of remedial sealant
Jobs vary more than people expect. The main factors:
- How many areas need sealing
- Working hours on commercial sites
- The product the joint needs
- Mould in or behind the old joints
Leaving a failed joint generally makes the job bigger, not smaller, as water and mould keep getting in. If you are not sure whether it needs doing, call 0345 464 0079 or email us for an honest opinion and a quote.
Helping us quote
Photos by email are helpful but not essential. Try to tell us:
- If it’s domestic, commercial or a hotel
- The rough size of the job
- A few pictures by email, if you can
- What’s wrong with the joints now
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email photos if that’s easy.
How the visit works
Most of a good job is in the preparation, so that is where we spend the time. Every joint is cleaned and dried before new material goes in. All told, the work takes a few hours for most joints, depending on how much old sealant has to come out. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Dartmouth Park. It helps if you can point us to a visitor permit or a bay close to the door.
- First we find out how and where the joint has failed.
- All the old sealant comes out, including any layers underneath.
- We clean the joint, treat any mould and let it 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.
Before we arrive
- Try not to wet indoor joints just before the visit
- Let us know about earlier repairs to the joints
- Let us know about parking restrictions
Get a quote
Need a quote? Please phone 0345 464 0079 or send us an email and tell us about the job. We will explain what we’d do and give you a clear quote before any work starts.
Related advice
Places near Dartmouth Park
Also in Dartmouth Park
Remedial sealant around Dartmouth Park
There are hotels and other places to stay in and around Dartmouth Park. 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.
As a London address, Dartmouth Park can be tricky for parking: let us know about parking bays, permits or a driveway. For an older house near a landmark such as Church of St Mary Brookfield, older homes can move a little, which is hard on rigid grout and tired sealant.
Dartmouth Park is about 2 miles east of Hampstead, in Greater London. Jobs in Dartmouth Park get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Our Greater London coverage runs to 764 places, and Dartmouth Park is one of them.
Here we cover the NW5, N19 and N7 postcode area for remedial sealant. You will find streets such as Hugo Road, Ward Road and Anson Road. Other places close to Dartmouth Park include Lissenden Gardens (1 mile south-west), Tufnell Park (1 mile east), Gospel Oak (1 mile south-west), Upper Holloway (1 mile north-east) and Highgate (1 mile north). We also work in nearby towns such as London (5 miles south-east), City of Westminster (3 miles south), Marylebone (3 miles south), Kensington (5 miles south-west), St Pancras (3 miles south-east) and Shoreditch (4 miles south-east).
Near you in Dartmouth Park
Locally, jobs take us to homes and businesses close to The Dartmouth Arms, Whittington Park and Brookfield Primary School and the streets around them. You will also find Asanté Academy of Chinese Medicine (1.4 miles north) and Vaughan Williams Memorial Library (1.5 miles south). The closest station to Dartmouth Park is Gospel Oak station, about 0.5 miles south-west. Other landmarks nearby include O2 Centre (1.8 miles south-west) and Isokon Gallery (1 mile south-west). Green spaces nearby include Belsize Wood and Dartmouth Park Hill.
Signs you need remedial sealant in Dartmouth Park
Products get mixed up: caulk where it gets wet, rigid sealant where things move, or an acetoxy silicone on a surface it can mark. None of them last.
It’s worth asking for a quote if you see:
- Thick, messy sealant smeared over tiles
- Leaks that keep coming back after resealing
- Mould trapped under a layer of silicone
- Torn expansion joints
If you let a flat or house near Gospel Oak station, botched sealant from a previous quick fix is easier to strip out between tenants.
Comparing quotes
- Which sealant they’ll use, and why
- What happens if they find a problem under the old sealant
- Whether VAT is included
- How long to leave it before use