Greater London · England
Remedial Sealant in Bexleyheath
Removing failed, mouldy or leaking sealant and putting it right for householders, landlords and businesses in Bexleyheath. Fully insured, ARBOMaster approved and guaranteed for a year.
- Worktop sealant that has shrunk and split
- Sealant peeling off a dusty or damp surface
- Black mould underneath the bead
How we handle remedial sealant in Bexleyheath
Removing failed sealant is the hardest part of the job. Every layer is cut out, the residue cleaned off and the joint degreased, taking care not to scratch the surfaces around it. Only then can new sealant bond. If you have floor or wall movement joints that have failed and a shower that leaks however often it’s resealed, we can help.
In much of London, period terraces have been converted into flats over the years, and bathrooms were often squeezed into small rooms. A compact bathroom that steams up every day is hard on silicone and grout.
You are covered for a year from the day we finish. If there’s a problem with it, please ring 0345 464 0079 or email us.
- Where
- Bexleyheath (DA7, DA6, DA16)
- Region
- Greater London
- Cover
- One year on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Looking after it afterwards
Aftercare is simple, and it makes a real difference:
- Deal with small splits early
- Keep an eye on the ceiling below the bathroom
- Keep movement joints clear of mortar and paint
- Run the fan after every shower
Clean gently: a mild cleaner and a soft cloth, with no blades or scourers.
If a joint has failed more than once, stop resealing it. Have someone find out why, or the next bead will go the same way.
FAQs for Bexleyheath
Do you work for landlords with property near Bexleyheath station?
Yes. We work for landlords and agents as well as homeowners, and several properties can be quoted together. Just phone 0345 464 0079 or send us an email with the address and what needs doing, and we’ll send you a clear quote.
Do you work for hotels and guest houses in Bexleyheath?
Yes. Hotel and guest-house work is part of what we do. Work can be planned room by room, and out-of-hours working can be arranged.
Can you remove old sealant without damaging the bath?
Yes. We avoid heavy scraping and use the right cleaner for each surface, so the new sealant bonds cleanly.
How long should I leave it?
Most sealants are touch-dry well before they’re fully cured. We will give you the cure time for the product we used before we leave.
Does someone need to be in?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
Do you fix expansion and movement joints?
Yes. We cut out the failed sealant, fit backing and reseal with a flexible product.
Do the sealants smell?
It depends on the product. Some products have a noticeable smell, others very little.
Do you take out the old sealant first?
Yes. Sealing over the old bead is the commonest cause of early failure, so we never do it.
DIY sealant or a professional job?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
Remedial sealant in Bexleyheath: local notes
There are hotels and other places to stay in and around Bexleyheath. 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, Bexleyheath can be tricky for parking: let us know about parking bays, permits or a driveway. If you let a flat or house near Bexleyheath station, a joint that keeps failing is best fixed properly while the property is empty. Schools such as Upland Primary School are buildings too, and its toilets, changing areas and kitchens need their sealant renewed like any other building’s.
Bexleyheath is about 3 miles south-east of Plumstead, in Greater London. We provide remedial sealant to homes and businesses in Bexleyheath, as part of our work across Greater London. Our area takes in 764 places across Greater London, large and small. There’s also a page for London, roughly 10 miles from Bexleyheath.
Every address in DA7, DA6 and DA16 is covered for remedial sealant, from the main roads to the quietest streets. That includes homes and businesses on Lion Road, Hyde Road and Upton Road. We also cover Upton (1 mile west), Crook Log (1 mile west), Blendon (1 mile south-west), Bexley (1 mile south) and Welling (1 mile west). Further out, we also cover London (10 miles west), City of Westminster (13 miles west), Marylebone (13 miles west), Kensington (15 miles west), St Pancras (12 miles north-west) and Shoreditch (10 miles north-west).
Around Bexleyheath
Typical jobs here are in homes near Danson Park, The Volunteer pub and Bexleyheath Academy and the streets around them. Bexleyheath has its own railway station: Bexleyheath station. A little further out are Bexley Hospital (within half a mile west) and Bexley Museum (1.2 miles south-east). The countryside around Bexleyheath includes Summer Hill and Wansunt Pit.
Why deal with it now?
Remedial work takes longer than a straight reseal, but rarely a lot: the work takes a few hours for a typical bath or shower, longer where several layers have been applied. Compared with chasing the same leak every few months, it’s time well spent. 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.
Doing several joints on one visit generally makes better use of the time than several visits. We’ll send you a clear quote for the lot.
Why choose Mr Mastic in Bexleyheath
- Domestic, commercial and hotel work
- We never seal over old sealant
- A 12-month guarantee on all work
- Colour agreed with you before any work starts
Read our cost guide or our reviews.
What the job involves on each surface
Movement & expansion joints
A sealant stuck to the back of the joint cannot stretch. Backing stops that, so the sealant grips the two sides only.
Leaking trays & enclosures
A shower that leaks after resealing often has a tray that moves or an enclosure sealed on the wrong side. We check both before any new sealant goes on.
What happens on the day
We work through the job in order: protection first, then preparation, sealing and a tidy-up. For most jobs that takes a few hours for most joints, depending on how much old sealant has to come out, and the area is left clean. In Bexleyheath, 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.
- First we work out whether the problem is the sealant, movement or a leak.
- 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.
Getting ready for the visit
- Let us know about stairs, lifts or work at height
- Keep children and pets away from the work area
- Tell us about any previous sealing or DIY attempts
Get a quote
Need a quote? Please ring 0345 464 0079 or drop us an email and tell us about the job. We will explain what we’d do and give you a clear quote before work begins.
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More services for Bexleyheath
When something else is needed
It helps to know what we cannot do too:
- A tray or bath that is cracked
- Tiles that have come away from the wall
- Old mastic in a building from before 2000 that should be checked for asbestos before it’s disturbed
Not sure which it is? You can call 0345 464 0079 or send us an email and we will tell you honestly before you book.
Joints and surfaces we work on
- Failed movement joints
- Leaking tray & enclosure joints
- Shrunken worktop sealant
- Botched or over-sealed joints
- Mouldy bath & shower sealant
- Expansion joints
Landlord and commercial work in Bexleyheath
We work for landlords and letting agents as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order.
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.