Greater London · England
Bathroom Resealing in Roundshaw
Bathroom resealing for Roundshaw, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Lumpy, uneven sealant from a DIY attempt
- Mouldy sealant that has gone black
- Water escaping at the shower enclosure
Keeping the joints in good condition
How long the joints last depends on use and care. Here’s what we suggest:
- Wait for the cure time we give you
- Keep bottles off the sealant line
- Wipe up water along the back of the worktop
- Run the extractor fan during and after every shower
Give the silicone time to cure before it gets wet, following the cure time we give you. After that, a quick wipe after showering helps keep it clean.
Mould that starts as a few spots spreads through the bead. Once it’s deep in the silicone, cleaning normally will not remove it. Replacing the sealant early keeps the job small.
Bathroom resealing in Roundshaw, done properly
A shower joint gets soaked every day. Trays, enclosures, screen profiles and wet room floors all need a flexible, waterproof seal. They’re resealed with anti-fungal sanitary silicone, finished smooth so water drains away rather than collecting. If you are dealing with leaks into the floor or ceiling below and new sealant laid over old sealant that is now lifting, we can put it right, whatever the surface.
Across London, a large share of homes are flats, conversions or mansion blocks, so a bathroom is often directly above a neighbour’s ceiling. That makes worn sealant and cracked grout in Roundshaw more than a cosmetic job.
You’re covered for a year from the day we finish. If anything is not right with it, phone 0345 464 0079 or drop us an email.
- Place
- Roundshaw (SM6, CR8, CR0)
- Region
- Greater London
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Your questions about bathroom resealing in Roundshaw
Is parking an issue for bathroom resealing in Roundshaw?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. The visit is then planned around what’s available.
I live in a flat in Roundshaw. Can a failed seal leak into the flat below?
Yes, and the first sign is often a stain on the ceiling below. Cutting out the old sealant and laying a new bead early stops it getting that far.
What do you put in the joint?
Each joint gets the product that suits it. Movement, water and weather all affect the choice.
Can you work on commercial sites?
Yes. Larger jobs can be planned room by room or area by area to suit the site.
Do you work in Roundshaw?
Yes. From our base in Crawley, we cover South East England, London and all of Scotland.
Is it OK to put new sealant on top of the old bead?
No. It’s a common reason for reseals failing. We cut out all of the old sealant, clean the joint and start again.
Do the sealants smell?
That depends on the sealant. Some products have a noticeable smell, others very little, and any smell fades as they cure.
How long does it take to reseal a bath or shower?
A single bath or shower takes about a couple of hours, including cutting out the old sealant. A full bathroom and kitchen can take most of a day.
What the job involves on each surface
Basins & vanity units
Vanity units have long, worktop-style joints against the wall. Water that gets behind can damage the unit, so a neat, continuous bead matters.
Shower trays & enclosures
The vertical joint where a screen profile meets the wall is a common leak point. It’s resealed along with the tray joints, sealing the side the enclosure’s instructions call for.
Why it’s worth doing now in Roundshaw
Sorting it now is quick: it takes a morning or an afternoon for most single baths and showers. Left until water gets through, the job can grow to lifting panels, drying out and decorating. Damp from a failed joint spreads quietly in older London brickwork and timber, and by the time it shows on a wall or ceiling in Roundshaw, the repair is bigger than the sealant job would have been.
Combining jobs into one visit generally makes better use of the time than several visits. You will get one clear quote for the whole job.
Why choose Mr Mastic in Roundshaw
- Anti-fungal silicone where joints get wet
- Old sealant always removed completely
- A 12-month guarantee on all work
- Tidy, careful work
Roundshaw homes and their sealant
London’s water is hard, which leaves limescale on sealant, grout and taps. There are hotels and other places to stay in and around Roundshaw. As well as homes, we work in hotel bathrooms, where resealing and regrouting can be done room by room.
For landlords with property near Wallington station, mouldy sealant is one of the first things a new tenant notices, so it’s worth renewing between lets. As a London address, Roundshaw can be tricky for parking: let us know about parking bays, permits or a driveway.
Roundshaw is about 2 miles south-west of Croydon, in Greater London. From the centre of Roundshaw to the outskirts, bathroom resealing is available for homes and businesses alike, from flats and houses to offices and hotels. Roundshaw is one of 764 towns and villages in Greater London we cover. You can also see our page for London, roughly 10 miles from Roundshaw.
Every address in SM6, CR8 and CR0 is within our area for bathroom resealing. We cover properties on Link Lane, Milton Road and Redwing Road and the roads around them. Other places close to Roundshaw include Russell Hill (1 mile east), Bandonhill (1 mile north), Peaks Hill (1 mile south), Waddon (1 mile north-east) and Wallington (1 mile north-west). We also work in nearby towns such as London (10 miles north), City of Westminster (11 miles north), Marylebone (11 miles north), Kensington (11 miles north), St Pancras (12 miles north) and Shoreditch (12 miles north).
What’s near Roundshaw
We work in homes and buildings around Wilson's School, Waddon Ponds and The John Fisher School, among other places. The closest station to Roundshaw is Wallington station, roughly 0.9 miles north-west. Nearby you’ll also find Purley War Memorial Hospital (1.2 miles south-east) and Croydon Airport Visitor Centre (0.6 miles east). Green spaces nearby include Roundshaw Downs and Duppas Hill.
Signs you need bathroom resealing in Roundshaw
Older sealant shrinks and hardens. In kitchens it often shrinks away from the back edge, leaving a thin gap where water and food collect. Hot pans and harsh cleaners do not help.
Any of these means the joints need attention:
- Water getting behind the bath panel
- Gaps where the bath or tray has moved
- Water getting behind the kitchen upstand
- Mouldy sealant that has gone black
In the older streets around St. Paul's, timber floors under older bathrooms flex, so joints need a sealant that moves with them.
What to look for in a quote
- What the quote includes, VAT included or not
- What preparation is included
- What product goes in the joint
- How much experience the applicator has
Can I do it myself?
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
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.
Towns and villages near Roundshaw
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How we quote for bathroom resealing
You will get a clear quote before work begins. It takes into account:
- When we can work, for business premises
- Whether there’s mould to deal with
- How easy the joints are to reach
- How much old sealant there is and how hard it is to remove
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote and we will talk you through it.
Helping us quote
You do not need to know the technical terms. It helps if you can tell us:
- Whether it’s a home or a business
- The rough size of the job
- A few photos by email, if you can
- Access, such as stairs, a lift or height
If you’re in Roundshaw and need bathroom resealing, ring 0345 464 0079 or email us. Tell us what the problem is and where, and we’ll agree the price before any work begins.
What we do, step by step
When we get to you, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. Most jobs then take a couple of hours for a single bath or shower. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Roundshaw. A visitor permit or a nearby bay makes the visit run more smoothly.
- We cover the area around the joints we’re working on.
- We cut away the old sealant and clean off what’s left.
- We treat any mould and let the joint dry properly.
- Baths are filled first, then anti-fungal sanitary silicone is applied in a colour to suit.
- The joint is finished neatly and we explain when it can get wet.
Before we arrive
- Mention any sign-in or site rules at work premises
- Mention any parking rules near the property
- Try not to wet indoor joints just before the visit
How to get a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.