West Sussex · England
Mastic man in Southwater
Resealing and mastic work for Southwater, the brick-making village south of Horsham that has grown to more than 10,000 people around Lintot Square.
- Anti-fungal silicone as standard
- 20+ years in the trade
- Guaranteed for a year
Sealant jobs we do in Southwater
Southwater calls itself a village, but with a population of over 10,000 it is bigger than plenty of towns. It is a civil parish in Horsham District, and much of its growth came from two local industries: the brickworks and the railway, which opened in 1866. Today it is mostly a residential place, and Mr Mastic covers it from our base in Crawley, a straightforward run across the district.
We reseal baths, showers, basins and kitchens, replace window and door mastic and seal external joints on homes and commercial buildings. Sealant doesn’t last for ever, and the time it takes to fail depends a lot on where it is and how it was put in. Our article on how long silicone sealant lasts gives realistic timescales.
From brickworks village to a large modern parish
At its peak, the Southwater brickworks made 18 million bricks a year and employed 100 men. It made red engineering bricks until it closed in 1981, and its old clay pits now form the lakes of Southwater Country Park, which opened in 1985. The railway yard closed in 1966, but by then the village had been shaped by both industries, and it has kept growing since: the population rose from 10,025 in 2001 to 10,730 in 2011.
That growth means a wide spread of house ages. There are older buildings such as Great House Farmhouse, a Grade II* listed late medieval house just west of the village, and Holy Innocents Church, built in 1848 to 1849. Most homes, though, are later houses and estates, and in those the sealant jobs are predictable: baths that drop slightly when filled and tear the seal, shower trays that flex, and worktop joints that have shrunk back over the years.
In houses that have had a bathroom refit or two, we often find a fresh bead run over an old one. It never bonds properly and mould grows in the gap, so we take every layer out before resealing.

Brick, render and the joints in between
A lot of local houses are brick-built, and brick moves slightly with the seasons. Where a uPVC or timber frame meets the brickwork, or where a newer extension joins the original wall, the joint has to flex. Rigid filler or a cheap mastic cracks within a few winters. We cut those joints out and replace them with a flexible exterior sealant over backing rod where the gap is deep; our external joints page explains the method.
Garages, conservatories and patio doors add more joints to keep an eye on. A conservatory roof meeting the house wall, or the threshold of a sliding door, can let rain in long before anyone notices a damp patch inside.
Lintot Square, the country park and local landlords
The village centre around Lintot Square was renewed in 2006 at a cost of £25 million and has shops, cafés and pubs, including the Lintot, the Hen and Chicken and the Tipsy Fox. Southwater Country Park has a visitor centre and café, and the Southwater Area Community Centre serves the parish. Busy kitchens, toilets and washrooms in buildings like these all need resealing from time to time, and we can work early or late to keep them open.
With so many family homes, there are also plenty of rented ones. Our landlord sealant service handles resealing between tenancies and after mould complaints.
How a job runs
- Call or email. Tell us what needs doing, where it is and anything about access. Photos by email help.
- Get a clear quote. We give you a clear price before any work starts, and agree a date with you.
- Cut out and prepare. All the old sealant comes out, and the joints are cleaned, treated and dried.
- Seal and finish. The right sealant for each joint is applied and tooled to a neat, even finish.
- Leave it to cure. We tell you how long to leave it before use, and the work carries our one-year guarantee.
Sealant services across Southwater
- Bathroom & kitchen resealing: Baths, showers, basins, wet rooms, worktops and sinks: old sealant cut out, mould treated and a new bead of anti-fungal silicone laid.
- Window & door mastic: Frame perimeters inside and out resealed with flexible, colour-matched sealant, with backing rod where the gap is deep.
- Commercial & hotel sealant: Commercial washrooms, kitchens and wet areas resealed floor by floor, so only a few rooms are out of use at once.
- Remedial sealant & repairs: Second opinions on sealant that keeps failing: we strip it out, check for movement or leaks and reseal it properly.
- Fire-rated sealant: Gaps in fire-separating walls and floors sealed with fire-rated products, following the tested details for each one.
- External & façade joints: Split or perished joints in walls and cladding replaced with exterior sealant designed to stretch with the building.
- New-build mastic & snagging: Failed builder sealant in new homes put right, and plot mastic for developers.
- Floor & skirting joints: Floor and skirting joints in homes, shops and warehouses sealed neatly and to the right depth.
- Regrouting: Tired or mouldy grout raked out and renewed, and the internal corners finished in flexible silicone.
- Glazing & conservatory sealant: Glazing joints on conservatories, roof lanterns and screens renewed with a sealant suited to glass and frames.
- Gutter, fascia & soffit sealing: Exterior joints at gutters, fascias and soffits resealed to stop drips and staining down the wall.
- Sand mastic for sash & case windows: Traditional burnt sand mastic renewed around sash and case windows and doors in stone and brick.
What you get with Mr Mastic in Southwater
Southwater is in the same district we drive through most weeks, and the houses here are the kind we work on all the time. You get a tradesperson with 20+ years’ experience who is fully insured and an ARBOMaster approved applicator, using Arbo and Everbuild sealants. We have more than 2,847 completed projects and a 4.9-star Google rating built on over 180 five-star reviews. The price is agreed in a clear quote at the start, and a one-year guarantee covers the work afterwards.
Landmarks near Southwater
For trains, Christs Hospital station is closest to the centre. Local landmarks include Christs Hospital School Museum (1.5 miles north-west). Typical jobs near the centre are in homes and businesses around Southwater Infant Academy, The Doyle School of Design and Technology, Holy Innocents Church and The Lintot pub. Green spaces within reach include Knepp Wildland.
What customers say
Rated 4.9 on Google from 180+ five-star reviews. Read the reviews on Google.
“Called for a bathroom reseal and the mastic man showed up on time with all the right equipment. Brilliant attention to detail. The sealant looks perfect and they kept everything tidy.”
“We had old mastic that needed replacing throughout our kitchen and bathrooms. The mastic man professional was knowledgeable, quoted fairly, and delivered excellent quality work. Highly recommend!”
“Professional mastic man service from start to finish. They assessed the work properly, gave a clear quote, and executed the job perfectly. Very satisfied with the results.”
Where we work in Southwater
Select your area for more local detail, or call 07833 053749 or email us with your postcode.
Nearby towns we cover
Southwater: common questions
Do you cover all of Southwater?
Yes. We cover the whole parish, from the village centre around Lintot Square to the outlying lanes, plus Horsham and the other villages of Horsham District.
The seal around my bath keeps splitting. What causes that?
Usually the bath moves when it is filled, so the seal tears. We reseal with the bath filled with water so the new bead allows for that movement.
Someone has sealed over my old silicone. Can you fix it?
Yes. We remove both layers completely, treat any mould and reseal from a clean joint.
Can you seal where my extension meets the original house?
Yes. We cut out cracked filler or mastic and replace it with a flexible exterior sealant, with backing rod where the gap is deep.
Do you work for cafés and shops in the village centre?
Yes. We reseal kitchens, toilets and washrooms in commercial premises and can work outside opening hours.
Can you look at a leaking conservatory or patio door?
Yes. If the leak is from failed sealant at the frame or the wall abutment, we can cut it out and reseal it.
How long does a bathroom reseal take?
A bath or shower is usually a few hours including removal of the old sealant, and the new seal needs about a day before use.
