Greater London · England
Agar Town Remedial Sealant
Remedial sealant across Agar Town and nearby, with every bit of old sealant taken out first.
- Kitchen joints letting water behind the worktop
- A shower that leaks however often it’s resealed
- Mould trapped under a layer of silicone
What happens if it’s left?
Adding more sealant is the usual quick fix, and it rarely works. It can’t bond to what’s underneath, so the leak carries on and there’s now more to remove. In a London flat, a failed joint rarely stays your problem alone: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
The cost reflects the work involved, not a rough estimate. That is why we ask a few questions first and give you a clear price before we start.
Why book with us
- Arbo and Everbuild products
- White, clear, grey or another colour, product permitting
- Over 20 years’ experience
- Fully insured
See our cost guide or our reviews.
Remedial sealant for homes and businesses in Agar Town
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. We work on failed movement joints, expansion joints and mouldy bath & shower sealant, and the jobs we see most are movement joints that have split or pulled away and beads that never stuck properly.
Much of London’s older housing is Victorian and Edwardian terraces, many of them now split into flats, with bathrooms fitted into whatever space was available. Small, steamy rooms are where mould gets into sealant and grout fastest.
Every job comes with a one-year guarantee.
- Location
- Agar Town (NW1W, NW1, N1)
- Wider area
- Greater London
- Cover
- A year, on every job
- Quote
- A clear price before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Remedial sealant in Agar Town: local notes
London has hard water, so limescale builds up on sealant, grout and fittings. There are hotels and other places to stay in and around Agar Town. Hotel bathrooms are part of our work as well as homes, and can be done room by room.
In the older streets around All Saints, timber floors under older bathrooms flex, so joints need a sealant that moves with them. As a London address, Agar Town can be tricky for parking: let us know about parking bays, permits or a driveway.
Agar Town is about 1 mile north-west of St Pancras, in Greater London. Wherever you are in the NW1W postcode area, we can carry out remedial sealant at your property. Across Greater London, we cover 764 places, and Agar Town is one of them.
Our applicators cover all of NW1W, NW1 and N1 for remedial sealant. If you need remedial sealant at a property on Water Lane, Maiden Lane and Camden Road or anywhere close by, our applicators can take on the job. Being close to the A400 and A5200, Agar Town is simple for us to get to. Neighbouring places we cover for remedial sealant include Camden Town (1 mile west), Somers Town (1 mile south), Kings Cross (1 mile south-east), Kentish Town (1 mile north-west) and Barnsbury (1 mile north-east). Further out, we also cover London (3 miles south-east), Kensington (4 miles south-west), Walthamstow (6 miles north-east), Whitechapel (3 miles south-east), Ruislip (12 miles west) and Brompton (3 miles south-west).
Landmarks near Agar Town
Locally, jobs take us to homes and businesses close to Vaughan Williams Memorial Library, Golden Lion pub and North Bridge House School, among other places. You’ll also find Regent High School (under half a mile south) and Lewis Cubitt Park (within half a mile east). Agar Town has its own railway station: Camden Road station. Well-known places in the area include St Pancras Hospital (under half a mile south) and Montfichet's Tower (2.2 miles south-east). Not far away are Barnsbury Wood and St. James's Park Lake.
Honest limits
We won’t take on work that won’t last, so these are the limits:
- Plumbing leaks behind walls or under trays
- A tray or worktop that needs refixing first
- Older mastics that may need an asbestos check before removal
If you are not sure, just ring 0345 464 0079 or send us an email and we’ll give you a straight answer before booking.
Joints and surfaces we work on
- Botched or over-sealed joints
- Leaking tray & enclosure joints
- Mouldy bath & shower sealant
- Failed movement joints
- Expansion joints
- Shrunken worktop sealant
Landlord and commercial work in Agar Town
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. We can quote for more than one property at once.
DIY versus a professional finish
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
If you’ve already had a go yourself, that’s fine. We cut it out and start again.
When to call us in Agar Town
How a joint is built matters as much as the product. A bead bonded on three sides, or laid too thick, can’t flex, 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:
- Torn expansion joints
- Caulk or the wrong sealant used in a wet area
- Over-sealed joints coming away
- A shower that leaks however often it’s resealed
If you let a flat or house near Camden Road station, failed or mouldy sealant is worth putting right between tenancies, before it turns into a leak.
Comparing quotes
- What the quote includes, VAT included or not
- How the joint is cleaned and prepared
- Who does the work, and how experienced they are
- How the colour is chosen
What we do, step by step
The work is kept neat and contained to the joints we’re treating, so you can carry on as normal. Expect the work to take a few hours for most joints, depending on how much old sealant has to come out. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. Mention any building rules, key holders or managing agents when you book.
- We start by checking the joint for movement, leaks and the reason it failed.
- We strip the joint completely, removing any layers below.
- The joint is cleaned, treated for mould and left to dry.
- We use the right backing and sealant for any joint that moves.
- Finally we finish the joint and talk you through what we found.
Preparing for the visit
- Mention any tricky access
- Keep pets and children clear of the area while we work
- Mention any leaks or damp you’ve noticed
Ask for a quote
Every job is quoted individually, so the first step is telling us about yours. Just call 0345 464 0079 or drop us an email with the details and send photos if you have them.
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Agar Town: your questions answered
Do you work for hotels and guest houses in Agar Town?
Yes, hospitality work, including hotels, is part of what we do. Jobs can be programmed room by room, with out-of-hours working possible to arrange.
Can worn sealant in a flat in Agar Town cause a leak downstairs?
Yes, and the first sign is often a stain on the ceiling below. A proper reseal before the leak starts is the easy fix.
Where is Mr Mastic based?
We work from Crawley. Our applicators cover Agar Town.
Do you fix expansion and movement joints?
Yes. If a joint has been filled with mortar or rigid filler, we rake it out where possible, then the joint is sealed properly.
Do you hold any approvals?
Yes. Mr Mastic is an ARBOMaster approved applicator and we are fully insured too.
What does remedial sealant cost?
Every job is different, so each one gets its own quote. For a quick quote, call 0345 464 0079 or drop us an email and tell us what needs doing and where.
What do you put in the joint?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
Will there be a smell?
That depends on the sealant. Some smell for a while, some hardly at all, and any smell fades as they cure.
Nearby places to Agar Town
More services for Agar Town
How we quote for remedial sealant
The price is agreed before any work begins. It takes into account:
- How many rooms, windows or areas are involved
- Any working-time requirements on site
- Whether the work is at height
- The product the joint needs
What it costs depends on how much there is to do, how much old material has to come out and how easy the joints are to reach. We give a clear quote before work begins.
What to tell us for a quote
When you contact us, it’s useful to know:
- A few pictures by email, if you can
- If someone has resealed it before
- If it’s domestic, commercial or a hotel
- Access, such as stairs, a lift or height
For a quick quote, get us on the phone, or email us if that’s easier. Describe what needs sealing and we’ll explain what’s involved.