Greater London · England
Remedial sealant & repairs in South Hampstead, Greater London
Remedial sealant for South Hampstead and the surrounding area: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- A second bead peeling off the first
- Gaps opening along the back of the worktop
- Beads that never stuck properly
Remedial sealant in South Hampstead
A joint that keeps letting you down needs more than another bead. It helps to have pictures when you call 0345 464 0079 or email us, and say how long ago it was last done. If you are dealing with black mould underneath the bead and decorators’ caulk around a bath or shower, we can help.
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 South Hampstead, that’s a good reason to put tired sealant and grout right early.
Big or small, it’s backed by our 12-month guarantee.
- Location
- South Hampstead (NW3, NW8, NW6)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Quote
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
How it 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. In total, it usually takes a few hours for a typical bath or shower, longer where several layers have been applied. For a job in South Hampstead, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor we are working on and whether there’s a lift.
- The failure is looked at first, so we know whether it’s sealant, movement or water from elsewhere.
- 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.
- The joint is tooled and you are told about anything else we found.
Preparing for the visit
- Mention any sign-in or site rules at work premises
- Keep children and pets away from the work area
- Clear items away from the joints we’re working on
How to get a quote
We quote each job on its own. Just call 0345 464 0079 or send us an email with the details.
Advice
Places near South Hampstead
What else we do in South Hampstead
Work for landlords, hotels and businesses
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
Do you need remedial sealant in South Hampstead?
Joint depth matters. Sealant packed too deep, or stuck to the back of the joint as well as the sides, cannot stretch, so it tears when the joint moves. Backing rod or bond-breaker tape prevents it.
If you can see any of these, it’s time to have the joints looked at:
- Mould trapped under a layer of silicone
- Torn expansion joints
- Leaks that keep coming back after resealing
- Sealant peeling off a dusty or damp surface
Managing a site like The UCL Academy? Then 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.
Before you book anyone
- What happens if the job turns out different
- How the joint is cleaned and prepared
- What guarantee comes with the work
- What insurance they hold
What remedial sealant looks like in South Hampstead
London has a lot of flats and conversions, and a failed shower or bath seal in one can show up on the ceiling below, so tired sealant is best dealt with early. There are hotels and other places to stay in and around South Hampstead. As well as homes, we work in hotel bathrooms, where resealing and regrouting can be done room by room.
Homes close to Church of All Souls include some older properties, and older homes can move a little, which is hard on rigid grout and tired sealant. South Hampstead is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
South Hampstead is about 1 mile south of Hampstead, in Greater London. For remedial sealant in and around South Hampstead, it’s easy to get a quote: please call 0345 464 0079 or send us an email. We cover Greater London from our Crawley base, South Hampstead included. We cover 764 towns and villages across Greater London, large and small.
Postcode districts we cover here for remedial sealant: NW3, NW8 and NW6. Streets in the area include Avenue Road, Acacia Road and Harben Road, all of which we cover. Neighbouring places we cover for remedial sealant include Swiss Cottage (1 mile north), St John's Wood (1 mile south), Haverstock (1 mile east), Belsize Park (1 mile east) and Primrose Hill (1 mile east). Further out, we also cover London (4 miles south-east), Kensington (3 miles south-west), St Pancras (3 miles south-east), Shoreditch (4 miles east), Walthamstow (7 miles north-east) and Hoxton (4 miles east).
Near you in South Hampstead
We work in homes and buildings around Cafe Med pub, St. Mary's Town and Country School and Holy Trinity CofE Primary School, among other places. Also close by are Cecil Sharp House (1.1 miles east) and Primrose Hill (0.6 miles east). There’s a railway station in South Hampstead itself: South Hampstead station. Well-known places in the area include Isokon Gallery (0.8 miles north-east) and O2 Centre (0.5 miles north-west). The countryside around South Hampstead includes Adelaide Nature Reserve and The Long Water.
South Hampstead questions
Do you work in hotels near South Hampstead?
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.
Can worn sealant in a flat in South Hampstead cause a leak downstairs?
Yes, and the first sign is often a stain on the ceiling below. Cutting out the old sealant and laying a new bead early stops it getting that far.
Do you cover South Hampstead?
Yes, we do. Our applicators work in South Hampstead, and the service is the same as everywhere else.
Do you guarantee remedial jobs?
Yes. You get our 12-month guarantee, and we’re fully insured.
Can failed expansion joints be resealed?
Yes. The depth is set with backing so the sealant only bonds to the two sides.
Will it make a mess?
Very little: the area around the joints is protected first, and we clear up the old sealant and our materials before we leave.
Can I choose the sealant colour?
Yes. White, clear and grey are common, and other colours are available, and we agree the colour with you before any work starts.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator, and we are fully insured.
What sealant work cannot fix
Before booking, it’s worth knowing the limits too:
- Leaks from a shower valve, waste or pipework (a plumber’s job)
- A bath, tray or worktop that moves until it’s properly fixed
- 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 will tell you honestly.
Joints and surfaces we work on
- Botched or over-sealed joints
- Leaking tray & enclosure joints
- Mouldy bath & shower sealant
- Failed movement joints
- Shrunken worktop sealant
- Expansion joints
Aftercare tips
A little care helps the new joints last. Our advice:
- Have loose fittings fixed before resealing
- Deal with small splits early
- Keep the room well ventilated
- Never seal over old silicone
Give the new sealant its full cure time: normally around 24 hours, or as long as we advise.
Signs to act on: 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.
Why deal with it now?
Adding more sealant is the usual quick fix, and it rarely works. It cannot bond to what’s underneath, so the leak carries on and there’s now more to remove. 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. Putting it right early is much less trouble for homes in South Hampstead.
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why South Hampstead clients choose us
- We’re fully insured
- A 12-month guarantee on all work
- Rated 4.9 stars on Google
- We agree the colour with you first
See our cost guide and our reviews.
How we quote for remedial sealant
For a quick quote, just ask. The main things that affect it are:
- The number of rooms or windows
- Whether there’s mould to deal with
- Which sealant suits the joint
- When we can work, for business premises
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
Helping us quote
Photos help, but a description is a good start. Try to tell us:
- If someone has resealed it before
- Roughly how big the job is
- Pictures of the joints, sent by email
- Access, such as stairs, a lift or height
Asking for a quote is easy: let us know the job and the location. Photos by email help us understand the job.