Hampshire · England
Remedial Sealant in Northbrook
Remedial sealant for Northbrook, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Thick, messy sealant smeared over tiles
- Torn expansion joints
- Gaps opening along the back of the worktop
Why act early in Northbrook
Another bead over the top will not fix a failed joint. It doesn’t grip the old layer, leaving the leak in place and one more layer to cut out later. Older cottages and farmhouses around Northbrook can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
What you get with us
- We leave the area clean and tidy
- Every job guaranteed for a year
- Sanitary silicone with an anti-fungal additive in wet areas
- White, clear, grey or another colour, product permitting
How we handle remedial sealant in Northbrook
A joint that keeps failing normally 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. Common call-outs are for floor or wall movement joints that have failed and black mould underneath the bead, on mouldy bath & shower sealant, botched or over-sealed joints and expansion joints.
Homes around Northbrook are mostly houses and cottages rather than flats, some with bathrooms tucked into older rooms or extensions. The work is the same as anywhere: old material cut out, joints cleaned and a fresh finish laid.
Each job carries a 12-month guarantee.
- Location
- Northbrook (SO21)
- Wider area
- Hampshire
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
How we quote for remedial sealant
Jobs vary more than people expect. The main factors:
- Whether old sealant or filler has to be cut out
- The number of rooms or windows
- The product the joint needs
- Any mould that needs treating
We do not show prices on the website, because each job is priced on what it involves. Call for a quick quote.
Asking for a quote
Photos by email are helpful but not essential. Try to tell us:
- Where the job is, and your postcode
- Whether it has been sealed before
- How many joints, rooms or windows are involved
- The type of property
Call for a quick quote, or email us if that is easier. Describe what needs sealing and we will talk you through the work before giving you a price.
What we do, step by step
Good joint work is mostly preparation, so that’s where we spend the time. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours, depending on how many layers have to come out. In a small place like Northbrook, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We look at how the sealant has failed and check for movement or a leak path.
- We strip the joint completely, removing any layers below.
- We clean the joint, treat any mould and let it dry.
- 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
- Tell us about access, such as stairs, a lift or high-level joints
- Clear the area around the work
- Mention any leaks or damp you’ve noticed
How to get a quote
To get a quote, call 0345 464 0079 or drop us an email with the location and a short description of the problem. We’ll give you a clear price before any work starts.
Advice
When something else is needed
We won’t take on work that will not last, so these are the limits:
- Water damage behind tiles that needs a tiler
- Old mastic in a building from before 2000 that should be checked for asbestos before it’s disturbed
- A cracked shower tray or bath (that needs repair or replacing)
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly.
Surfaces we seal
- Botched or over-sealed joints
- Shrunken worktop sealant
- Failed movement joints
- Expansion joints
- Leaking tray & enclosure joints
- Mouldy bath & shower sealant
What remedial sealant looks like in Northbrook
Hard water is the norm across most of the South East, which leaves limescale on sealant, grout and fittings, and it has to be cleaned off before new sealant goes in.
For landlords with property near Micheldever station, botched sealant from a previous quick fix is easier to strip out between tenants. Schools such as Micheldever CofE Primary School are buildings too, and 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.
Northbrook is about 7 miles north of Winchester, in Hampshire. Northbrook gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. We cover 683 towns and villages across Hampshire, large and small. There’s also a page for Southampton, about 17 miles away.
Jobs for remedial sealant in SO21 is quoted and booked the same way as anywhere else. We also cover the places around Northbrook: Micheldever (1 mile south-east), Stoke Charity (1 mile west), Hunton (2 miles west), Micheldever Station (2 miles north) and East Stratton (2 miles east). Larger places within reach include Basingstoke (11 miles north-east), Winchester (7 miles south), Eastleigh (13 miles south), Andover (10 miles north-west), Chandler's Ford (13 miles south-west) and Alton (13 miles east).
Around Northbrook
Locally, jobs take us to homes and businesses close to Half Moon and Spread Eagle pub. Northbrook’s nearest station is Micheldever station, about 2.1 miles north of the centre.
DIY sealant or a professional job?
What a professional job adds is preparation and the right 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.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
Signs you need remedial sealant in Northbrook
Water from somewhere else can ruin a good seal. A leaking valve, a failed waste or cracked grout feeds water behind the bead, and the sealant lifts or goes mouldy from underneath.
Look out for any of the following:
- Sealant peeling off a dusty or damp surface
- Wide, uneven beads that look worse than the old ones
- Kitchen joints letting water behind the worktop
- A shower that leaks however often it’s resealed
In the older streets around Church of St Mary, older homes can move a little, which is hard on rigid grout and tired sealant.
What your quote should include
- Is VAT in the price?
- What happens if the job turns out different
- Whether the sealant suits the joint
- What preparation is included
Your questions about remedial sealant in Northbrook
Is Northbrook within the area you cover?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Is Northbrook in your area for remedial sealant?
Yes. Our work covers London and the South East, and Northbrook is part of that. You can ring 0345 464 0079 or email us and let us know what needs doing, and we will send you a clear quote.
What do you need from me for a quote?
The location, the problem and the rough size of the job. If you can, email a few photos.
Are you ARBOMaster approved?
Yes. We hold ARBOMaster approved applicator status, and we are fully insured.
Do I need to be at home?
We need access to the joints, so we’ll agree that with you when we book. Indoors, that usually means someone at home.
Do you have insurance?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
Should I try DIY first?
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.
Where do you work from?
Our base is in Crawley, and we cover South East England, London and all of Scotland.
Places near Northbrook
Also in Northbrook
Aftercare tips
Once the sealant has cured, a few habits help it last:
- Always have old sealant cut out, not covered
- Have loose fittings fixed before resealing
- Keep bleach and abrasives off the bead
- Ask why a joint failed before redoing it
Watch the joint over the first few weeks, particularly where the original failure was caused by movement. If anything changes, just ring 0345 464 0079 or send us an email.
Don’t keep resealing the same joint. Get the cause found first, otherwise the next attempt will fail too.