Greater London · England
Remedial sealant & repairs in Poplar, Greater London
Problem with your failed sealant joints in Poplar? We cut out the old, prepare the joints and apply the right sealant.
- Repeat leaks from the same joint
- Smears and lumps from a botched reseal
- Kitchen joints letting water behind the worktop
Landlords, agents and businesses in Poplar
If you manage several properties in or around Poplar, several properties can be quoted together. Just tell us the addresses and what each one needs.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
About our remedial sealant in Poplar
Getting old sealant out properly is slow, careful work. 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 a shower that leaks however often it’s resealed and movement joints that have split or pulled away, we can help, whatever the surface.
In much of London, period terraces have been converted into flats over the years, and bathrooms were often squeezed into small rooms. Small, steamy rooms are where mould gets into sealant and grout fastest.
Whatever the size of the job, you get the same one-year guarantee.
- Where
- Poplar (E14, SE16, E22)
- Wider area
- Greater London
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
What happens on the day
At the end, we look at the finished work together. The work normally takes a few hours, depending on how many layers have to come out, depending on the size of the job. For a job in Poplar, 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.
- First we work out whether the problem is the sealant, movement or a leak.
- Old beads and residue are removed down to clean surfaces.
- We treat any mould and dry the joint thoroughly.
- We reseal with a product suited to the joint, backed where needed.
- The joint is tooled and you are told about anything else we found.
Getting ready for the visit
- Let us know about earlier repairs to the joints
- Try not to wet indoor joints just before the visit
- Clear items away from the joints we are working on
Ask for a quote
Asking for a quote is easy: let us know the job and the location and its rough size. Photos by email help us understand the job, and we will take it from there.
Read more
What we are called out for in Poplar
Joint depth matters. Sealant packed too deep, or stuck to the back of the joint as well as the sides, can’t stretch, and tears at the first real movement. Backing rod or bond-breaker tape prevents it.
If you can see any of these, it’s time to have the joints looked at:
- Wide, uneven beads that look worse than the old ones
- Kitchen joints letting water behind the worktop
- Dark patches showing through the sealant
- Leaks that keep coming back after resealing
In the older streets around St Peter's Church, older homes can move a little, which is hard on rigid grout and tired sealant.
What your quote should include
- How much experience the applicator has
- Whether you can choose the colour
- What happens if the job turns out different
- Whether VAT is included
Why act early in Poplar
Ripping out a bathroom is not usually needed. If the bath, tray and tiles are sound, remedial resealing usually puts it right. Where something else has failed, you will hear it from us. In London conversions, one flat’s bathroom is often above another flat’s ceiling, and a slow leak from a failed seal can end up in the flat below. Putting it right early is much less trouble.
The cost reflects the work involved, not guesswork. That is why we ask a few questions first.
Why choose Mr Mastic in Poplar
- We are fully insured
- Anti-fungal sanitary silicone in wet areas
- Over 20 years’ experience
- Approved under the ARBOMaster scheme
See what affects the cost and our reviews.
What we can’t put right
In fairness, some problems need a different trade:
- Movement from fittings that aren’t supported
- Failed tanking or loose tiles behind the sealant
- Plumbing leaks behind walls or under trays
If you’re not sure, just ring 0345 464 0079 or drop us an email and we’ll give you a straight answer.
Surfaces we seal
- Failed movement joints
- Botched or over-sealed joints
- Shrunken worktop sealant
- Mouldy bath & shower sealant
- Leaking tray & enclosure joints
- Expansion joints
Different surfaces, different methods
Mouldy bath & shower sealant
Mould that has grown into silicone doesn’t clean out for good. The sealant is cut out completely, the joint treated with a mould remover and dried ahead of a new anti-fungal bead.
Windows & doors
A frame that keeps leaking may not be the mastic. We check the joint and tell you if it looks to be something else.
Poplar homes and their sealant
There are hotels and other places to stay in and around Poplar. Hotel bathrooms are part of our work as well as homes, and can be done room by room. London’s water is hard, which leaves limescale on sealant, grout and taps, and it has to be cleaned off before new sealant goes in.
Rented homes near Canary Wharf station change hands often, and botched sealant from a previous quick fix is easier to strip out between tenants. For site and facilities teams at buildings such as Tower Hamlets College, its toilets, changing areas and kitchens need their sealant renewed like any other building’s.
Poplar is about 2 miles south-west of Plaistow, in Greater London. Every kind of property in Poplar can book us for remedial sealant. The work is guaranteed for a year. Our area takes in 764 places across Greater London.
Every address in E14, SE16 and E22 is covered for remedial sealant. You will find streets such as Market Way, Castor Lane and Dockyard Lane. Poplar is on the A102 and A1261, which makes it straightforward to reach. If you’re just outside Poplar, we cover London Docklands (1 mile south), Canary Wharf (1 mile south-west), Heron Quays (1 mile south-west), Coldharbour (1 mile south-east) and Blackwall (1 mile east). Further out, we also cover London (3 miles west), City of Westminster (6 miles west), Marylebone (6 miles west), Kensington (8 miles west), St Pancras (5 miles west) and Shoreditch (3 miles north-west).
Landmarks near Poplar
Locally, jobs take us to homes and businesses close to Bartlett Park, Langdon Park Secondary School and Our Lady and St Joseph Catholic Primary School, among other places. There’s a railway station in Poplar itself: Canary Wharf station. Nearby you’ll also find Museum of the Book (0.8 miles north-west) and Poplar Hospital (0.6 miles north-east). Green spaces nearby include Lavender Pond and St. James's Park Lake.
Looking after it afterwards
Aftercare is simple, and it makes a real difference:
- Keep the room well ventilated
- Report a tray that rocks or a worktop that lifts
- Keep an eye on the ceiling below the bathroom
- Clean sealant with mild products only
Keep an eye on the joint at first, particularly where the original failure was caused by movement. Should anything change, call 0345 464 0079 or send us an email.
Warning signs: peeling layers, mould showing through the bead, leaks after showering or cracks in a movement joint. Each one is worth getting looked at.
Your questions about remedial sealant in Poplar
Do you take on hotel work around Poplar?
Yes, hospitality work, including hotels, is part of what we do. Work can be planned room by room, and out-of-hours working can be arranged.
Do you work for landlords with property near Canary Wharf station?
Yes, landlords and agents are among the people we work for. You can ring 0345 464 0079 or drop us an email with the details for a clear quote.
Do I need to be at home?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
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.
Do you have insurance?
Yes. Full insurance covers our work.
Which products do you use?
Each joint gets the product that suits it. Movement, water and weather all affect the choice.
Can you reseal a split movement joint?
Yes. We cut out the failed sealant, fit backing and reseal with a flexible product.
Where are you based?
Our base is in Crawley, West Sussex, and we cover South East England, London and all of Scotland.