Greater London · England
Remedial Sealant in Northumberland Heath
Removing failed, mouldy or leaking sealant and putting it right for homes and businesses in Northumberland Heath and across Greater London. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Leaks that keep coming back after resealing
- Kitchen joints letting water behind the worktop
- Beads that never stuck properly
Remedial sealant for homes and businesses in Northumberland Heath
Water on the floor doesn’t always mean failed silicone. Cracked trays, leaking wastes and faulty valves often look like a sealant problem. When the fault is elsewhere, we say so instead of resealing for the sake of it. We work on failed movement joints, botched or over-sealed joints and mouldy bath & shower sealant, and people most often call us about mould trapped under a layer of silicone and repeat leaks from the same joint.
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.
Every job comes with a 12-month guarantee.
- Where
- Northumberland Heath (DA8, DA7)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Price
- A clear price before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Looking after it afterwards
Simple care keeps the joints in good condition. Our advice:
- Keep an eye on the ceiling below the bathroom
- Keep bleach and abrasives off the bead
- Find out why the sealant failed first
- Check trays and worktops don’t move
Watch the joint over the first few weeks, especially if movement was the problem. If anything changes, just ring 0345 464 0079 or send us an email.
A split movement joint lets rain into walls and floors, and left long enough, the edges of the joint can crumble. Resealing while the edges are sound is simpler.
Northumberland Heath: your questions answered
Is parking a problem for a job in Northumberland Heath?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. The visit is then planned around what’s available.
I let a flat near Barnehurst station. Can you help?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before work begins.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done and you’ll get one quote.
Do you have insurance?
Yes. We’re fully insured.
Will there be a smell?
Sometimes, a little. It fades as the sealant cures, and ventilation helps.
Someone resealed my shower and it’s leaking again. Can you help?
Yes. We will take all the sealant out, look for why it failed and reseal it properly.
Can you strip sealant from an acrylic tray safely?
Yes. We take our time over removal, especially on acrylic, enamel and uPVC.
How long will it take to strip and reseal the joint?
That depends on how many layers there are and how many joints. We will tell you before we start.
Leave it or put it right?
A joint that has failed twice will fail again unless the cause is dealt with. Finding it, whether movement, water from elsewhere or an unsuitable product, ends the cycle. Damp from a failed joint spreads quietly in older London brickwork and timber, and once it shows in Northumberland Heath, the repair is bigger than a sealant job.
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. You’ll know the price before we begin.
What you get with us
- Full insurance on every job
- A sealant colour to suit the surroundings
- You choose the colour before work begins
- Every job guaranteed for a year
Read how sealant jobs are priced or our reviews.
Remedial sealant around Northumberland Heath
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. London has hard water, which leaves limescale on sealant, grout and taps, and it has to be cleaned off before new sealant goes in.
Homes close to St Paul's include some older properties, and walls and floors in older homes can move, and sealant and grout show it first. For landlords with property near Barnehurst station, failed or mouldy sealant is worth putting right between tenancies, before it turns into a leak.
Northumberland Heath is about 3 miles north-west of Dartford, in Greater London. Northumberland Heath gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Northumberland Heath is one of 764 towns and villages in Greater London we cover for remedial sealant. London is on our list too, around 11 miles away.
Our applicators cover all of the DA8 and DA7 postcode area for remedial sealant and the streets around it. That includes homes and businesses on Mill Road, Penda Road and Chalk Road. Neighbouring places we cover for remedial sealant include Bexley Riverside (1 mile south-east), Erith (1 mile north), Barnehurst (1 mile south), Belvedere (1 mile north-west) and Lessness Heath (1 mile north-west). Larger places within reach include London (11 miles west), City of Westminster (14 miles west), Marylebone (14 miles west), St Pancras (13 miles west), Shoreditch (11 miles west) and Walthamstow (11 miles north-west).
Local landmarks in Northumberland Heath
Around Northumberland Heath, our work takes us to homes and buildings near Trinity School, The Royal Oak pub and Braeburn Park and the streets around them. Northumberland Heath’s nearest station is Barnehurst station, about 0.6 miles south-west of the centre. Nearby you will also find Erith Museum (0.7 miles north-east) and Erith and District Hospital (within half a mile north). Not far away are Crossness Nature Reserve.
What we do, step by step
Before we leave, we go over the finished joints with you. The work normally takes a few hours, depending on how many layers have to come out, depending on the size of the job. In a London area like Northumberland Heath, the main things to plan are parking and access: let us know about parking, the floor we’ll be working on and any lift or shared entrance.
- We look at how the sealant has failed and check for movement or a leak path.
- We strip the joint completely, removing any layers below.
- Next, any mould is treated and the joint dried.
- 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.
Preparing for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Let us know if you’ve seen damp or leaks
- Mention any tricky access
How to get a quote
Need a quote? Please ring 0345 464 0079 or drop us an email with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
Advice
Places near Northumberland Heath
What else we do in Northumberland Heath
When to call us in Northumberland Heath
Movement tears sealant that isn’t designed for it. A bath that flexes, a tray that rocks or a building joint that opens and closes will split a rigid or thin bead.
It’s worth asking for a quote if you see:
- Kitchen joints letting water behind the worktop
- Repeat leaks from the same joint
- Caulk or the wrong sealant used in a wet area
- Wide, uneven beads that look worse than the old ones
Northumberland Heath is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Before you book anyone
- Is VAT in the price?
- How long the guarantee is
- What the cure time is
- What preparation is included
Can I do it myself?
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly.
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.
Honest limits
Some problems need a builder, plumber or other trade rather than us:
- Cracks in the fitting rather than the joint
- Old mastic in a building from before 2000 that should be checked for asbestos before it’s disturbed
- Failed tanking or loose tiles behind the sealant
If you’re 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
- Shrunken worktop sealant
- Leaking tray & enclosure joints
- Mouldy bath & shower sealant
- Failed movement joints
- Expansion joints
Landlords, agents and businesses in Northumberland Heath
We work for landlords and agents as well as homeowners. Sealant work between tenants keeps a property looking cared for before the next move-in.
We also work for property managers and facilities teams. Several sites can go on one quote, and we’re fully insured for the work.