Hertfordshire · England
South Mimms Remedial Sealant
Removing failed, mouldy or leaking sealant and putting it right for South Mimms, backed by a 12-month guarantee. Call for a quick quote.
- Wide, uneven beads that look worse than the old ones
- Mould trapped under a layer of silicone
- A shower that leaks however often it’s resealed
Remedial sealant for homes and businesses in South Mimms
Not every leak is a sealant leak. 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. If you have caulk or the wrong sealant used in a wet area and a second bead peeling off the first, we can put it right, whatever the surface.
Somewhere as small as South Mimms, homes tend to be cottages, farmhouses or converted buildings, with some newer houses too. Older walls and timber floors can move a little, and cracked grout and split sealant are often the first signs.
A one-year guarantee comes as standard, so you’re not left on your own once the job is done.
- Where
- South Mimms (EN6)
- Wider area
- Hertfordshire
- Cover
- 12 months on all our work
- Quotes
- A clear price before work begins
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
What we do, step by step
You do not need to clear the whole room or building before we come, just the space around the work. We protect the rest, and the job takes a few hours for a typical bath or shower, longer where several layers have been applied for a typical job. Somewhere as small as South Mimms, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First we find out how and where the joint has failed.
- 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.
- The new joint is tooled neatly and we explain anything else we found.
Getting ready for the visit
- Try not to wet indoor joints just before the visit
- For business premises, tell us about site rules or sign-in
- Mention any tricky access
Getting a quote
We do not publish a price list. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or drop us an email.
Related advice
What happens if it’s left?
DIY removal often leaves scratches and a film of residue, and the residue left behind stops the next bead bonding. Careful removal is most of a remedial job. Around South Mimms, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you are not sure whether it needs doing, phone 0345 464 0079 or drop us an email and we’ll give you an honest view and a quote.
What you get with us
- A 12-month guarantee on all work
- Homes, businesses and hotels
- Sanitary silicone with an anti-fungal additive in wet areas
- Arbo and Everbuild products
Read what affects the cost and customer reviews.
What affects the quote in South Mimms
We do not publish a price list, because no two jobs are the same. What we look at:
- Any working-time requirements on site
- The number of rooms or windows
- Whether there’s mould to deal with
- How much old sealant there is and how hard it is to remove
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether the work is at height. We take all of that into account in your quote.
Asking for a quote
Before you ask for a quote, have a think about:
- How we’d reach the joints
- The address or postcode of the job
- Roughly how big the job is
- Any previous sealing or DIY work
For a quote, call 0345 464 0079 or send us an email with the location and a short description of the problem. You’ll have a clear quote before we start.
Remedial sealant in South Mimms: local notes
Hard water is the norm across most of the South East, so limescale builds up on sealant, grout and fittings.
If you look after a building such as St Giles' CofE Primary School, we reseal washrooms and kitchens in schools and businesses as well as homes. Rented homes near Potters Bar station change hands often, and a joint that keeps failing is best fixed properly while the property is empty. If you live in an older home near Church of St Giles, bathrooms in older houses have often been refitted more than once, with sealant laid over sealant.
South Mimms is about 2 miles west of Potters Bar, in Hertfordshire. If you need remedial sealant in South Mimms, it’s easy to get a quote: please call 0345 464 0079 or drop us an email. We are based in Crawley and cover Hertfordshire, South Mimms included. South Mimms is one of 381 places in Hertfordshire where we work for remedial sealant. For nearby work, see our London page, about 15 miles away.
Postcode districts we cover here for remedial sealant: EN6. We cover properties on St Giles' Avenue, Blanche Lane and Greyhound Lane. Close by, we work in Ridge (1 mile south-west), Dancers Hill (1 mile south-east), Kitts End (2 miles south-east), Well End (2 miles south-west) and Green Street (2 miles south-west). Within a short drive, we also cover Watford (8 miles west), Hemel Hempstead (11 miles west), Stevenage (15 miles north), St Albans (6 miles north-west), Welwyn Garden City (7 miles north) and Harpenden (10 miles north-west).
Near you in South Mimms
In South Mimms, that means homes and buildings near The White Hart Public House, North Mimms Park and Dame Alice Owen's School and the streets around them. The nearest railway station is Potters Bar station, about 1.6 miles east. Other landmarks nearby include Spires Shopping Centre (2.9 miles south-east) and Shenley Hospital (2.7 miles west). The countryside around South Mimms includes Darland's Lake and Furzefield Wood and Lower Halfpenny.
Looking after it afterwards
Looking after new joints is easy, and it makes a real difference:
- Use a soft cloth, not a scourer, on silicone
- Check ceilings under showers for marks
- Ask why a joint failed before redoing it
- Always have old sealant cut out, not covered
Do not let anyone seal over it later. New silicone doesn’t bond to old.
If a joint has failed more than once, stop resealing it. Get the cause found first, otherwise the next attempt will fail too.
Also near South Mimms
Also in South Mimms
Questions from South Mimms
Is South Mimms within the area you cover?
Yes. South Mimms is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
I let a flat near Potters Bar station. Can you help?
Yes, landlords and agents are among the people we work for. Just call 0345 464 0079 or drop us an email with the address and what needs doing, and we will send you a clear quote.
Do you work for hotels and businesses?
Yes. Hotels, offices and other businesses use us, and we are fully insured.
Where are you based?
Our base is in Crawley, and we work across South East England, London and Scotland.
Someone resealed my shower and it’s leaking again. Can you help?
Yes. There’s usually a reason: sealant over sealant, movement or another leak, and we deal with the cause first.
Can you strip sealant from an acrylic tray safely?
Yes, with care. We cut and lift the old sealant with tools suited to the surface, then clean off the residue. We point out any damage that’s already there.
Will it make a mess?
We keep the work tidy. We protect what’s around the joints.
Is it worth trying it myself?
Some simple jobs can be done by a careful DIYer. Most DIY failures come from sealing over old material, wet joints or too much sealant.
What the job involves on each surface
Worktops & kitchens
Old kitchen sealant pulls back from the wall over time. We strip it, degrease the joint and reseal colour-matched to the worktop.
Leaking trays & enclosures
A cracked tray, failed valve or leaking waste needs a different fix. We say so rather than reseal.
What we can’t put right
To be straight with you, some problems need a different trade:
- Failed tanking or loose tiles behind the sealant
- Old mastic in a building from before 2000 that should be checked for asbestos before it’s disturbed
- A leaking trap, valve or supply pipe
If in doubt, phone 0345 464 0079 or email us and we’ll say what we think.
Surfaces we seal
- Botched or over-sealed joints
- Failed movement joints
- Leaking tray & enclosure joints
- Mouldy bath & shower sealant
- Shrunken worktop sealant
- Expansion joints