Kent · England
Remedial sealant & repairs in Cold Harbour, Kent
Remedial sealant for Cold Harbour, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Mould trapped under a layer of silicone
- Sealant that came away because the surface wasn’t prepared
- A shower that leaks however often it’s resealed
Can I do it myself?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Remedial sealant in Cold Harbour
With more than 20 years’ experience, our applicators have seen most of the ways sealant can fail. We are fully insured ARBOMaster approved applicators, and every remedial job comes with a 12-month guarantee. We work on leaking tray & enclosure joints, botched or over-sealed joints and mouldy bath & shower sealant, and common reasons people get in touch are beads that never stuck properly and mould trapped under a layer of silicone.
In a village or hamlet like Cold Harbour, homes are often older cottages and farmhouses alongside a few newer houses. Older walls and timber floors can move a little, and cracked grout and split sealant are often the first signs.
Every job is covered by a 12-month guarantee, wherever you are in Kent.
- Place
- Cold Harbour (ME17)
- Wider area
- Kent
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Surface by surface
Windows & doors
Smeared or badly matched mastic can be cut out and redone neatly, in a colour that suits the frame.
Movement & expansion joints
Bonding on three sides is a common reason movement joints tear. Backing stops that, so the sealant grips the two sides only.
What happens if it’s left?
Stripping out botched sealant adds time to a reseal, but rarely a lot: the work takes a few hours for most joints, depending on how much old sealant has to come out. It’s far less disruption than resealing the same joint again and again. Older cottages and farmhouses around Cold Harbour can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
What it costs depends on the size of the job, how much old material has to come out and access to the work. You will have a clear quote before any work starts, so you know where you stand.
Why choose Mr Mastic in Cold Harbour
- Full insurance on every job
- Neat joints and a tidy finish
- More than 20 years in sealant work
- Every job guaranteed for a year
Read our cost guide and customer reviews.
Towns and villages near Cold Harbour
Also in Cold Harbour
What happens on the day
Before we leave, we go over the finished joints with you. 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 village or hamlet like Cold Harbour, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- We look at how the sealant has failed and check for movement or a leak path.
- Every layer of old sealant is cut and cleaned out.
- We clean the joint, treat any mould and let it dry.
- Moving joints get backing and a flexible sealant to suit.
- Finally we finish the joint and talk you through what we found.
How to prepare
- Let us know about parking restrictions
- Mention if the joints have been sealed before
- On commercial sites, let us know about site rules
Get a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. When it suits you, phone 0345 464 0079 or email us.
Read more
What affects the cost of remedial sealant
The quote reflects the job in front of us. We take into account:
- The number of rooms or windows
- Working hours on commercial sites
- How easy the joints are to reach
- The type of sealant required
We don’t show prices on the website, because each job is priced on what it involves. Call for a quick quote.
Asking for a quote
Before you ask for a quote, have a think about:
- If someone has resealed it before
- A few pictures by email, if you can
- Roughly how big the job is
- Where the property is
We don’t publish a price list, because every job is different. Instead, we give you a clear price for your job. To arrange one, ring 0345 464 0079 or email us.
Your questions about remedial sealant in Cold Harbour
Is Cold Harbour within the area you cover?
Yes, Cold Harbour is covered. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Do you work for landlords with property near Charing station?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before any work starts.
Will the old sealant be removed?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
Are you ARBOMaster approved?
Yes. We’re approved under the ARBOMaster scheme, which is run for the Arbo sealant brand.
Will you leave a mess?
No. We work neatly, protect the area around the joints and tidy up afterwards.
What does remedial sealant cost?
There’s no set price, as it depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
Do I need to be at home?
For indoor joints, yes, someone needs to let us in. Once we’ve agreed the job, you do not need to watch us work.
Can old silicone be taken off without scratching the tiles?
Yes. We cut and lift the old sealant with tools suited to the surface, and the residue is cleaned away. Any existing damage is pointed out before any work starts.
Landlords, agents and businesses in Cold Harbour
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. Several properties can go on one quote.
We also work for property managers and facilities teams in Cold Harbour and across Kent. We can quote a run of properties together, and we’re fully insured for the work.
Aftercare tips
No joint lasts for ever, but care makes a real difference. A few tips:
- Check ceilings under showers for marks
- Act on a lifting corner straight away
- Always have old sealant cut out, not covered
- Air the bathroom so the sealant can dry
Clean gently: a mild cleaner and a soft cloth, with no blades or scourers.
Do not keep resealing the same joint. Get the cause found first, otherwise the next attempt will fail too.
Bathrooms and kitchens in Cold Harbour
Hard water is the norm across most of the South East, so limescale builds up on sealant, grout and fittings.
If you live in an older home near Church of St Lawrence, timber floors under older bathrooms flex, so joints need a sealant that moves with them. Rented homes near Charing station change hands often, and failed or mouldy sealant is worth putting right between tenancies, before it turns into a leak.
Cold Harbour is about 7 miles south-west of Faversham, in Kent. We carry out remedial sealant for homes and businesses in Cold Harbour and the surrounding area, as part of our work across Kent. Cold Harbour is one of 922 towns and villages in Kent we cover. For nearby work, see our Chelmsford page.
Work in ME17 is quoted and booked the same way as anywhere else. Other places close to Cold Harbour include Warren Street (1 mile north-west), Payden Street (1 mile north-west), Lenham Heath (2 miles south-west), Charing Heath (2 miles south) and Lenham Forstal (2 miles south-west). Further out, we also cover Maidstone (11 miles west), Ashford (8 miles south-east), Canterbury (14 miles east), Sittingbourne (7 miles north), Whitstable (14 miles north-east) and Faversham (7 miles north-east).
Near you in Cold Harbour
In Cold Harbour, that means homes and buildings near The Harrow pub and Spuckles and Kennelling Woods and the streets around them. The closest station to Cold Harbour is Charing station, about 2.3 miles south. Other landmarks nearby include Newnham Castle (3.4 miles north).