Kent · England
Mastic man in Minster
Bathroom, kitchen and window resealing for homes across Minster on the Isle of Sheppey, from older streets near the abbey to the estates towards Halfway.
- Old sealant cut out, never covered
- ARBOMaster approved
- One-year guarantee on every job
Your local mastic man for Minster
Minster, often called Minster-on-Sea, sits on the north coast of the Isle of Sheppey, with Sheerness and Halfway Houses to the west. It has grown from a village into a sizeable place, with over 17,000 residents counted in the 2021 census, and a lot of its homes are family houses with bathrooms that have seen years of use. Mr Mastic covers Minster from our base in Crawley, resealing baths and showers, kitchen worktops and basins, and replacing the mastic around windows and doors.
We are not the kind of firm that runs a fresh bead over a mouldy one. Old silicone is cut out, any black mould underneath is treated, and the joint is dried before the new sealant goes on. Where mould has been a repeated problem, our anti-mould resealing service uses anti-fungal products and explains how to keep the bead clean.
From an abbey village to a large island community
The oldest building in Minster is the abbey church on the hill, where the convent’s Saxon church and the parish church stand side by side, and the old abbey gatehouse is now a museum. For centuries the settlement around it stayed small. Speculative builders arrived on the island in the early 20th century, and after the Second World War Minster grew sharply, so today much of its housing dates from the post-war decades onwards.
That mix gives us a fairly predictable set of jobs. Post-war semis and bungalows have usually had their bathrooms refitted at least once, often with an acrylic bath that flexes when it is filled. If the bath was sealed empty, the bead tears as soon as someone gets in. We fill the bath first, then seal, so the joint is laid at its widest. Later houses and estates tend to have replacement uPVC windows and patio doors whose mastic has gone hard and grey after years in the sun and wind.
Bungalows bring their own detail: with everything on one level, the shower is often a walk-in tray or level-access area, and the joint between tray, wall and floor has to be sound or water reaches the floor beneath.

Clay cliffs and an exposed northern coast
Minster’s coast is made of London Clay, and the cliffs here are known for slipping as the waves wear them back. Homes on the higher ground near the coast are exposed to wind coming in off the estuary, and external mastic on those elevations dries out and loses its grip sooner than it would further inland. Ground movement on clay can also open hairline gaps where frames meet brickwork.
Our answer outside is a flexible, weatherproof sealant with backing rod where the gap is deep, so the new joint can move a little without splitting. We check sills and the joints beneath them too, as that is often where rain gets in first; our window and door mastic page explains the frame types we work on. For bungalows, most external work can be done from the ground or a short ladder, which keeps the job quick.
Holiday homes, schools and island landlords
Minster has its share of holiday homes and let properties, where bathrooms see heavy use through the season. Resealing between bookings means the sealant has time to cure before the next guests. Oasis Academy Isle of Sheppey, the island’s secondary school, has a site in Minster, and schools, surgeries and care settings across the island all have washrooms that need attention from time to time.
We also reseal for private landlords and letting agents, working between tenancies so properties are ready on time.
How a job runs
- Tell us about the job. A quick call or email with what needs sealing and where. Photos help us quote accurately.
- Quote and booking. We quote clearly before anything starts and fix a day that works for you.
- Strip back the old joint. Every bit of old sealant is removed and the joint is cleaned, treated for mould and dried.
- Lay the new bead. We apply the right product for each joint and tool it to a clean, even line.
- Cure and guarantee. We tell you when it can be used, and every job has our one-year guarantee.
What we do in Minster
- Bathroom & kitchen resealing: Every joint in the bathroom and kitchen, from the bath edge to the worktop, stripped back and resealed with anti-fungal silicone.
- 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: Hotels, offices, washrooms and welfare areas resealed room by room, with out-of-hours working possible to arrange.
- Remedial sealant & repairs: Leaks and lifting beads from earlier sealant jobs put right, starting with finding out why they failed.
- Fire-rated sealant: Intumescent and fire-rated joints around pipes, cables and frames, installed to the manufacturer’s tested specification.
- 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: Skirting-to-floor gaps, tiled floor movement joints and concrete floor joints sealed with the right product.
- Regrouting: Cracked, stained or crumbling grout raked out and replaced, with corners resealed in 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: Gutter unions, outlets and fascia joints that leak in heavy rain cleaned and resealed.
- Sand mastic for sash & case windows: Traditional sand mastic for period windows and doors where a modern sealant would look out of place.
Choosing a mastic man in Minster
We travel to Sheppey from Crawley and treat every Minster job the same way we would at home. That means 20+ years of sealant work, full insurance and ARBOMaster approved applicator status, with Arbo and Everbuild sealants used throughout. We have finished 2,847+ projects and hold a 4.9-star Google rating from over 180 five-star reviews. The price is set out in a clear quote before we begin, and a one-year guarantee covers the finished work.
Landmarks near Minster
The nearest station to the town centre is Queenborough station. Well-known places nearby include Minster Gatehouse Museum (less than half a mile north-east) and Castle Rough (4.5 miles south-west). Closer in, we work on homes, rented flats and businesses near Thistle Hill Academy, Oasis Academy Isle of Sheppey, Leigh Academy Minster and The Abbey Church Of St Mary And St Sexburga.
What customers say
Rated 4.9 on Google from 180+ five-star reviews. Read the reviews on Google.
“New build in Forge Wood — shower seal had failed after 16 months. Mr Mastic came out quickly, removed everything and did it properly. Perfect finish and no more leaks.”
“Harper Drive in Maidenbower — kitchen worktop had been leaking behind for a while. Came out the next day, sorted it properly. Really tidy job.”
“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.”
Where we work in Minster
Find your area below, or call 07833 053749 or email us with your postcode and a few details.
Also near Minster
Minster: common questions
Do you cover all of Minster?
Yes. We cover the whole of Minster on Sheppey, along with Halfway Houses, Sheerness and Queenborough nearby.
Do you also cover Minster near Ramsgate?
Minster-in-Thanet is a separate village on the other side of Kent. Give us a call and we will let you know when we can get there.
My bungalow has a walk-in shower. Can you reseal it?
Yes. We reseal the tray, wall and floor joints and check that any level-access area drains properly before the new sealant goes on.
Why does the sealant round my bath split every time I use it?
Acrylic baths flex under weight. If the bath was sealed empty, the bead tears. We fill it before sealing so the joint is laid at its widest.
My house is near the coast. Do I need special window mastic?
A flexible, weatherproof sealant is the right choice on exposed walls. We cut out the old mastic first and use backing rod where the gap is deep.
Can you reseal a holiday home between bookings?
Yes. Let us know your changeover dates and we will plan the visit so the sealant has cured before guests arrive.
Can you colour-match the sealant to my bathroom?
Yes. We carry a range of colours and can match white, ivory, grey and other common finishes.
