Greater London · England
Remedial Sealant in St Mary Cray
Removing failed, mouldy or leaking sealant and putting it right for homes and businesses in St Mary Cray and across Greater London. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Sealant applied over old sealant that has lifted
- Beads that never stuck properly
- Floor or wall movement joints that have failed
How the job changes by surface
Leaking trays & enclosures
If the tray is cracked, or the leak is from the valve or waste, sealant will not fix it. We say so rather than reseal.
Worktops & kitchens
Shrunken worktop sealant leaves a gap that lets water into the back edge. It’s cut out, degreased and resealed colour-matched to the worktop.
Remedial sealant for homes and businesses in St Mary Cray
A joint that keeps failing generally has a reason. A tray that moves, a worktop that isn’t fixed, the wrong sealant or water getting in elsewhere will beat any new bead. We look for the cause before we reseal. We work on expansion joints, mouldy bath & shower sealant and botched or over-sealed joints, and common reasons people get in touch are smears and lumps from a botched reseal and products that weren’t meant for the joint.
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. A compact bathroom that steams up every day is hard on silicone and grout.
Whatever the size of the job, you get the same 12-month guarantee in St Mary Cray and across Greater London.
- Where
- St Mary Cray (BR5, BR6, BR7)
- Region
- Greater London
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Places near St Mary Cray
Other services in St Mary Cray
Do you need remedial sealant in St Mary Cray?
One of the commonest remedial jobs is sealant on top of sealant. Silicone doesn’t bond to silicone, so the top layer lifts and water and mould collect between the two.
Keep an eye out for any of the following:
- Over-sealed joints coming away
- A shower that leaks however often it’s resealed
- Mould trapped under a layer of silicone
- Products that weren’t meant for the joint
Schools such as Poverest Primary School are buildings too, and we reseal washrooms and kitchens in schools and businesses as well as homes.
Before you book anyone
- Which sealant they’ll use, and why
- What the cure time is
- How hidden problems are handled
- What guarantee comes with the work
What we do, step by step
We keep the work tidy and contained to the joints we’re treating, so you can carry on as normal. The job normally takes a few hours for most joints, depending on how much old sealant has to come out, and we explain the cure time before we leave. For a job in St Mary Cray, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- We protect the surfaces around the joint.
- Every layer of failed sealant is stripped out.
- We clean and degrease the joint and look for signs of movement or water.
- Once dry, a suitable sealant is applied and tooled.
- You get the cure time and our view on why the joint failed.
Getting ready for the visit
- Keep children and pets away from the work area
- Let us know about earlier repairs to the joints
- Tell us if parking is tricky
Get a quote
There’s no standard price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or email us.
Advice
Questions from St Mary Cray
Can you help a landlord with a rental near St Mary Cray station?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before work begins.
Could a tired shower seal in my St Mary Cray flat affect the neighbours below?
Yes. In a flat, water from a failed bath or shower seal has only one way to go, and that is down. A proper reseal before the leak starts is the easy fix.
What if resealing won’t fix my leak?
That’s why we look for the cause first. If the fault is elsewhere, you will know before any work is done.
Do the sealants smell?
There can be a smell while the sealant cures, which fades as it sets. Ventilation helps.
Do you guarantee remedial jobs?
Yes. You get our 12-month guarantee.
Which products do you use?
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.
How long does remedial resealing take?
That depends on how many layers there are and how many joints. You will have a timescale before any work begins.
Where is Mr Mastic based?
We work from Crawley. Our applicators cover St Mary Cray.
How to look after the new joints
A little care helps the new joints last. We recommend:
- Don’t add new sealant on top of old
- Find out why the sealant failed first
- Report a tray that rocks or a worktop that lifts
- Never fill a movement joint with mortar or grout
If we have found a cause, such as a loose tray or a leaking waste, get it fixed, because the new sealant cannot hold back a problem underneath.
A split movement joint lets rain into walls and floors, and the longer it’s left, the more the joint edges break down. A joint with sound edges is far easier to reseal.
How we quote for remedial sealant
The quote reflects the job in front of us. We take into account:
- The old material and how stubborn it is
- Mould in or behind the old joints
- When we can work, for business premises
- Which sealant suits the joint
The cost reflects the work involved, not guesswork. That’s why we ask about the job first and agree the price before starting.
What we need to know
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- Whether it’s a home or a business
- If someone has resealed it before
- A few photos by email, if you can
- Roughly how big the job is
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints.
Landlord and commercial work in St Mary Cray
For anyone letting property in or around St Mary Cray, jobs at different addresses can go on one quote. Send us the addresses and the work at each, and pictures by email help.
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together, and we’re fully insured.
Can I do it myself?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
Bathrooms and kitchens in St Mary Cray
London has a lot of flats and conversions, and a failed shower or bath seal in one can show up on the ceiling below, which is why it’s worth fixing early. London has hard water, so limescale builds up on sealant, grout and fittings.
For landlords with property near St Mary Cray station, failed or mouldy sealant is worth putting right between tenancies, before it turns into a leak. If you live in an older home near Church of St Mary, timber floors under older bathrooms flex, so joints need a sealant that moves with them.
St Mary Cray is about 11 miles south-east of London, in Greater London. For remedial sealant in and around St Mary Cray, please call 0345 464 0079 or drop us an email for a quick quote. We are based in Crawley and cover Greater London. St Mary Cray is one of 764 places in Greater London where we work for remedial sealant. There’s also a page for London, about 11 miles away.
Our applicators cover all of BR5, BR6 and BR7 for remedial sealant. Streets in the area include New Road, Kent Road and Park Road, all of which we cover. St Mary Cray is on the A224, so it’s easy for us to get to. Other places close to St Mary Cray include Poverest (1 mile south-west), St Paul's Cray (1 mile north), Orpington (1 mile south), Derry Downs (1 mile south-east) and Kevington (1 mile east). We also work in nearby towns such as London (11 miles north-west), City of Westminster (14 miles north-west), Marylebone (14 miles north-west), Kensington (15 miles north-west), St Pancras (13 miles north-west) and Shoreditch (12 miles north-west).
What’s near St Mary Cray
In St Mary Cray, that means homes and buildings near Harris Academy Orpington, The Blue Anchor Public House and Walsingham School and the streets around them. St Mary Cray has its own railway station: St Mary Cray station. Nearby you’ll also find London Borough of Bromley Museum (0.9 miles south) and Lullingstone Castle (4.5 miles south-east). The countryside around St Mary Cray includes Summer Hill and The Warren.