Kent · England
Northfleet Remedial Sealant
We cover Northfleet for removing failed, mouldy or leaking sealant and putting it right. Old sealant removed completely, joints prepared properly and a one-year guarantee.
- Leaks that keep coming back after resealing
- Mould trapped under a layer of silicone
- Sealant peeling off a dusty or damp surface
About our remedial sealant in Northfleet
The wrong product in the wrong joint fails however neatly it’s applied. We take it out and use a sealant made for that joint. We’re often asked to deal with a second bead peeling off the first and dark patches showing through the sealant, on leaking tray & enclosure joints, failed movement joints and mouldy bath & shower sealant.
Most bathrooms in a town like Northfleet are in family homes, used every day, which is hard on sealant and grout. The usual signs are mould in the bead, gaps by the sink and grout that is cracked or stained.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Place
- Northfleet (DA11)
- Wider area
- Kent
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
When something else is needed
In fairness, there are a few things sealant will not fix:
- Cracks in the fitting rather than the joint
- Tiles that have come away from the wall
- Plumbing leaks behind walls or under trays
Not sure which it is? You can call 0345 464 0079 or email us and we will tell you honestly.
Joints and surfaces we work on
- Botched or over-sealed joints
- Shrunken worktop sealant
- Leaking tray & enclosure joints
- Failed movement joints
- Mouldy bath & shower sealant
- Expansion joints
Bathrooms and kitchens in Northfleet
Northfleet is close to the coast. Coastal homes, holiday lets and guest houses can see heavy bathroom use in busy months, which wears sealant and grout out faster than in a quiet home. Most of the South East has hard water, which leaves limescale on sealant, grout and fittings.
For site and facilities teams at buildings such as Northfleet Technology College, washroom and kitchen sealant there needs the same care as at home, and schools and businesses are part of our work as well as homes. Homes close to Church of All Saints include some older properties, and bathrooms in older houses have often been refitted more than once, with sealant laid over sealant.
Northfleet is about 5 miles east of Dartford, in Kent. Homes, rented property, offices and hotels in Northfleet can book us for remedial sealant. The work is guaranteed for a year. Our Kent coverage runs to 922 places, and Northfleet is one of them. Our London page covers work nearby.
Jobs for remedial sealant in DA11 works the same way as everywhere else we cover. Local streets include Lawrance Square, London Road and Marks Square. Being close to the A2 and A226, Northfleet is easy for our applicators to reach. Neighbouring places we cover for remedial sealant include Painters Ash (1 mile south-west), Springhead (1 mile west), Windmill Hill (1 mile east), Northfleet Green (1 mile south) and Gravesend (1 mile east). Within a short drive, we also cover Maidstone (14 miles south-east), Dartford (5 miles west), Sevenoaks (13 miles south-west), Swanley (8 miles west), Kings Hill (11 miles south) and Foley Park (13 miles south-east).
Near you in Northfleet
Locally, jobs take us to homes and businesses close to The Six Bells pub, Saint George's Church of England School and Copperfield Academy. Northfleet’s nearest station is Gravesend station, roughly 1 mile north-east. Other landmarks nearby include Bluewater (3.3 miles west) and Stone Castle (3.1 miles west). Open spaces near Northfleet include Chafford Gorges Nature Park and Sawyers Lake.
Why it’s worth doing now in Northfleet
A failed seal rarely means a new bathroom. When the fittings are sound, stripping and resealing the joints is often enough. Where something else has failed, you will hear it from us. Gaps in sealant and mould in the bead never get better on their own, and in a busy household in Northfleet they spread with every shower and every downpour. Replacing the sealant now is the simplest fix.
Doing several joints on one visit is usually more efficient than separate visits. You will get one clear quote for the whole job.
Why choose Mr Mastic in Northfleet
- Colour picked to suit the job
- 4.9 on Google from 180+ five-star reviews
- Colour agreed with you before work begins
- Anti-fungal sanitary silicone in wet areas
Read what affects the cost and our reviews.
Places near Northfleet
Also in Northfleet
What affects the quote in Northfleet
You’ll get a clear quote before work begins. It takes into account:
- The old material and how stubborn it is
- Any mould that needs treating
- The number of rooms or windows
- How easy the joints are to reach
What it costs depends on the size of the job, how much old material has to come out and access to the work. We give a clear quote before work begins.
What to tell us for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- Any access issues, like height or stairs
- Whether it’s a home or a business
- Photos by email, if that is easy
- Where the property is
To get a quote, phone 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. You’ll have a clear quote before any work starts.
FAQs for Northfleet
Do you cover Northfleet for remedial sealant?
Yes, Northfleet is within the area we cover. We work across London and the South East. Just ring 0345 464 0079 or drop us an email with a few details of the job.
Do you take on hotel work around Northfleet?
Yes, hospitality work, including hotels, is part of what we do. Jobs can be programmed room by room, with out-of-hours working possible to arrange.
Where is Mr Mastic based?
Our base is Crawley, with over 20 years’ experience. We work across South East England, London and Scotland.
Are you insured?
Yes. We are fully insured, with over 20 years’ experience in sealant work.
Do I need to be at home?
That depends on where the joints are. Inside work needs someone to give us access, and for outside work we will agree access with you when we book.
Can you take off two layers of silicone?
Yes. Each layer is cut out and the residue cleaned off, then the joint is resealed once.
What if the leak is not the sealant?
In that case, we tell you what we’ve found. You may need a plumber or bathroom fitter before any new sealant goes on.
How long before the joint can be used?
It depends on the product and the conditions. We tell you how long to leave it before we go.
What the job involves on each surface
Movement & expansion joints
A movement joint must be able to stretch. We remove the failed sealant, fit backing and reseal.
Over-sealed & botched joints
A botched joint can hide two or three layers of sealant, and silicone residue is cleaned off the tiles too. Only a clean joint will take a new bead.
What we are called out for in Northfleet
Joints that move need sealant that can stretch. Flexing baths, rocking trays and building movement joints will split a rigid or thin bead.
Signs it’s time to call us include:
- Smears and lumps from a botched reseal
- Mould trapped under a layer of silicone
- Products that weren’t meant for the joint
- Beads that never stuck properly
Letting a property close to Gravesend station? Then botched sealant from a previous quick fix is easier to strip out between tenants.
Before you book anyone
- How much experience the applicator has
- Which colour the sealant will be
- Is VAT in the price?
- What insurance they hold
How it works
Our applicators work methodically: protect, prepare, seal, tidy. For most jobs that takes a few hours for most joints, depending on how much old sealant has to come out. Parking in a town like Northfleet is normally straightforward, but tell us if there’s a driveway or any restrictions, and mention if the work is upstairs, in a flat or high on the outside.
- We protect the surfaces around the joint.
- Every layer of failed sealant is stripped out.
- The joint is degreased and checked for movement and leaks.
- New sealant goes in once the joint is dry, and is tooled smooth.
- We give you the cure time and explain what caused the failure.
Getting ready for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Keep pets and children clear of the area while we work
- For business premises, tell us about site rules or sign-in
Get a quote
If you’re in Northfleet and need remedial sealant, call 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and you will get a clear quote before work begins.
Related advice
Keeping the joints in good condition
So the new joints stay in good condition:
- Get the cause of a repeat leak found before resealing
- Keep bleach and abrasives off the bead
- Look for stains below bathrooms now and then
- Always have old sealant cut out, not covered
Go easy on the new sealant: a mild cleaner and a soft cloth, with no blades or scourers.
Mould under a second layer of sealant keeps growing out of sight. When it finally shows, the whole bead needs to come out.