Greater London · England
Remedial Sealant in Old Oak Common
Removing failed, mouldy or leaking sealant and putting it right for homes and businesses in Old Oak Common and across Greater London. Fully insured, ARBOMaster approved and guaranteed for a year.
- Caulk or the wrong sealant used in a wet area
- Dark patches showing through the sealant
- Kitchen joints letting water behind the worktop
How we handle remedial sealant in Old Oak Common
Water on the floor doesn’t always mean failed silicone. A cracked tray, a failed shower valve or a leaking waste can look just the same. When the fault is elsewhere, we say so instead of resealing for the sake of it. We’re often asked to deal with torn expansion joints and thick, messy sealant smeared over tiles, across botched or over-sealed joints, leaking tray & enclosure joints and failed movement joints.
In much of London, period terraces have been converted into flats over the years, with bathrooms fitted into whatever space was available. Small, steamy rooms are where mould gets into sealant and grout fastest, and homes in Old Oak Common are no different.
There’s a 12-month guarantee on every job, whatever its size.
- Location
- Old Oak Common (NW10, W3, NW26)
- Region
- Greater London
- Guarantee
- 12 months on all our work
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What remedial sealant looks like in Old Oak Common
London has hard water, which leaves limescale on sealant, grout and taps. 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.
Letting a property close to Willesden Junction station? Then a joint that keeps failing is best fixed properly while the property is empty. Schools such as Old Oak Primary School are buildings too, and 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.
Old Oak Common is about 1 mile south of Harlesden, in Greater London. We carry out remedial sealant for homes and businesses in Old Oak Common and the surrounding area. Our Greater London coverage runs to 764 places, and Old Oak Common is one of them. For nearby work, see our London page.
All of NW10, W3 and NW26 is covered for remedial sealant, from the main roads to the quietest streets. Whether your property is on Atlas Road, Tubbs Road and Waldo Road or a nearby road, we can help. Close by, we work in College Park (1 mile north-east), Harlesden (1 mile north), Kensal Green (1 mile east), Park Royal (1 mile west) and North Kensington (1 mile east). Within a short drive, we also cover London (7 miles east), City of Westminster (4 miles east), Marylebone (4 miles east), Kensington (3 miles south-east), St Pancras (6 miles east) and Shoreditch (7 miles east).
Near you in Old Oak Common
Around Old Oak Common, our work takes us to homes and buildings near Green Man Public House, Library for Iranian Studies and Star Chamber Academy and the streets around them. Also close by are Little Wormwood Scrubs (0.8 miles east) and St Claudine's Catholic School for Girls (0.8 miles north). Old Oak Common has its own railway station: Willesden Junction station. Other landmarks nearby include Westfield London (1.7 miles south-east) and Hammersmith Hospital (0.8 miles south-east). Green spaces nearby include Hanger Hill Wood and Campden Hill.
Your questions about remedial sealant in Old Oak Common
Do you work for landlords with property near Willesden Junction station?
Yes. We work for landlords and letting agents as well as homeowners, and several properties can go on one quote. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we’ll give you a clear price.
Is parking an issue for remedial sealant in Old Oak Common?
Parking in Old Oak Common, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly.
Does someone need to be in?
Access is agreed with you when the job is booked. Indoors, that usually means someone at home.
Do you hold any approvals?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
How long does remedial resealing take?
That depends on how many layers there are and how many joints. We will tell you before we start.
Does remedial work come with a guarantee?
Yes. Remedial work carries the same 12-month guarantee as all our work.
What do you put in the joint?
Products from Arbo and Everbuild, among others, picked for each joint. We will tell you what we’re using and why.
Will it make a mess?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
How to look after the new joints
So the new joints stay in good condition:
- Use a soft cloth, not a scourer, on silicone
- Have loose fittings fixed before resealing
- Keep the room well ventilated
- Never seal over old silicone
If the joint ever needs renewing, have it cut out, not sealed over. Over-sealing is how many remedial jobs start.
Mould trapped under over-sealed joints spreads unseen. When it finally shows, the whole bead needs to come out.
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How the visit works
On the day, we start by going over the job with you, so you know exactly what we are doing. Surfaces next to the work are protected before we start. The work generally takes a few hours for a typical bath or shower, longer where several layers have been applied. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. If the building has a concierge, managing agent or access rules, tell us when you book.
- First we find out how and where the joint has failed.
- All the old sealant comes out, including any layers underneath.
- The joint is cleaned, treated for mould and left to dry.
- Where the joint moves, backing and a flexible sealant suited to the movement go in.
- The new joint is tooled neatly and we explain anything else we found.
Preparing for the visit
- Tell us about any previous sealing or DIY attempts
- Mention any parking rules near the property
- Clear the area around the work
Get a quote
Call for a quick quote, or email us if that is easier. Tell us about the joints that need doing and we will explain what’s involved.
Related advice
What happens if it’s left?
Adding more sealant is the usual quick fix, and it rarely works. It does not grip the old layer, leaving the leak in place and one more layer to cut out later. 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.
Combining jobs into one visit usually makes better use of the time than several visits. You will get one clear quote for the whole job.
Why us?
- You choose the colour before work begins
- Every job guaranteed for a year
- ARBOMaster approved applicator
- Old sealant always removed completely
DIY versus a professional finish
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
What sealant work can’t fix
A few problems are outside what sealant work can do:
- Failed tanking or loose tiles behind the sealant
- Sealant in an older building that needs testing for asbestos first
- A bath, tray or worktop that moves until it’s properly fixed
If in doubt, call 0345 464 0079 or send us an email and we will say what we think before booking.
Surfaces we seal
- Shrunken worktop sealant
- Botched or over-sealed joints
- Expansion joints
- Failed movement joints
- Mouldy bath & shower sealant
- Leaking tray & enclosure joints
What the job involves on each surface
Movement & expansion joints
Joints filled with mortar, grout or rigid filler cannot move. Where it can be raked out, we replace it with flexible sealant.
Worktops & kitchens
Old kitchen sealant pulls back from the wall over time. It’s cut out, degreased and resealed in a colour to suit.
When to call us in Old Oak Common
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 sets the depth and stops that.
The problems people normally mention when they call include:
- Gaps opening along the back of the worktop
- Black mould underneath the bead
- Products that weren’t meant for the joint
- Sealant that came away because the surface wasn’t prepared
Homes close to Church of Eritrean Orthodox Brent include some older properties, and timber floors under older bathrooms flex, so joints need a sealant that moves with them.
What your quote should include
- What product goes in the joint
- Who does the work, and how experienced they are
- How the surfaces are prepared before sealing
- How hidden problems are handled