Kent · England
Mastic man in Margate
Bathroom resealing, sash and bay window mastic and weatherproof external joints for Margate’s seafront flats, Cliftonville terraces and holiday lets.
- Fully insured
- Arbo and Everbuild sealants
- Clear quote before we start
Resealing and mastic work across Margate
Margate has been welcoming visitors to its sands for well over two centuries, and a lot of its housing still reflects that: tall terraces built as boarding houses, villas turned into flats, and a growing number of holiday lets. Mr Mastic is based in Crawley and covers Margate and the rest of Thanet, resealing baths, showers, basins and kitchens, and replacing tired mastic around windows, doors and external joints.
If your bath seal has turned black, or there’s a gap opening up between the shower tray and the tiles, the fix is the same wherever you live. The old bead is cut out and every trace of it removed, the joint is cleaned and dried, and a new bead of anti-fungal sanitary silicone goes in. Our anti-mould resealing page explains how we deal with joints that keep going black.
Boarding-house terraces, Cliftonville squares and seafront flats
Cliftonville, on the cliffs east of the old town, was laid out as a planned extension of Margate in the mid-to-late 19th century. Around Dalby Square you’ll find yellow stock brick, stucco fronts, timber sash windows and full-height canted bays, and directories of the time list several boarding houses on the square alone. Many of these big houses have since been divided into flats and bedsits, which means bathrooms fitted into spare rooms, stacked one above another.
That layout makes a failed seal more serious. A shower tray that leaks in a second-floor flat soon shows on the ceiling below, and timber floors in older buildings flex as people walk across them, which tears a stiff, ageing bead. We use flexible sanitary silicone, fill baths before sealing so the joint is set at full load, and check tray corners and screen edges where water usually gets through.
Outside, the council’s own appraisal notes how many original sashes have been swapped for uPVC. Those replacement frames are now old enough that their perimeter mastic has hardened and shrunk. Where timber sashes survive, the joint between frame and brick or render needs a sealant that suits both. Our guide to mastic for sash windows covers the options.

Sea air and chalk cliffs
Margate sits right on the sea on the chalk of the Isle of Thanet, and buildings along the front and the clifftops get the full force of the wind and spray. External mastic on exposed elevations dries out faster than it would inland, and once a joint opens, wind-driven rain gets behind sills and frames. We use weatherproof exterior sealants, add backing rod where gaps are deep, and look at sills and the joints underneath them, not just the frame edges.
Holiday lets, guest accommodation and rented flats
Since Turner Contemporary opened beside the harbour in 2011, Margate has drawn more weekend visitors, and many owners now run flats and houses as short lets. Bathrooms in a busy let get heavy use and guests notice mould straight away. We can reseal between bookings, and we’ll tell you the cure time so you can plan the next arrival.
For landlords and letting agents with converted flats, we reseal between tenancies or when a tenant reports a leak, and we’re happy to quote for several units together. Care homes and supported housing in the town can also call on us for landlord and managed-property sealant work.
What happens when you book
- Get in touch. Call or email with the job, your postcode and a few photos if you have them.
- Quote and booking. We quote clearly before anything starts and fix a day that works for you.
- Cut out and prepare. All the old sealant comes out, and the joints are cleaned, treated 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.
Sealant services across Margate
- 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: Window and door mastic that has dried out in the sun replaced with a weather-resistant joint that can move with the frame.
- Commercial & hotel sealant: Sealant programmes for offices, hotels, care settings and schools, with early or late working where it helps.
- Remedial sealant & repairs: Messy, layered or wrong-product sealant cut out and replaced with the right sealant, laid the right way.
- Fire-rated sealant: Fire-rated and intumescent sealant around gaps, frames and service penetrations, to the product’s tested details.
- External & façade joints: Expansion joints in brick, render and cladding cut out and renewed at the right depth so they can move without splitting.
- New-build mastic & snagging: Snagging sealant for new homes and plot-by-plot mastic for builders and developers.
- Floor & skirting joints: Movement joints in tiled and concrete floors, and skirting gaps, sealed so they stay tidy and keep dirt out.
- Regrouting: Tired or mouldy grout raked out and renewed, and the internal corners finished in flexible silicone.
- Glazing & conservatory sealant: Glass-to-frame joints on conservatories, rooflights and shower screens cut out and resealed.
- Gutter, fascia & soffit sealing: Gutter unions, outlets and fascia joints that leak in heavy rain cleaned and resealed.
- Sand mastic for sash & case windows: Sash and case window surrounds in stone and brick re-pointed with traditional sand mastic.
Choosing a mastic man in Margate
Thanet is a fair drive from our Crawley base, so we plan Margate visits properly and arrive with the right products for the job. Mr Mastic has more than 20 years in the trade, carries full insurance and is an ARBOMaster approved applicator working with Arbo and Everbuild sealants. Over 2,847 projects have earned us a 4.9-star Google rating from 180+ five-star reviews. You’ll have a clear quote before any old sealant comes out, and the finished work is covered by our one-year guarantee.
Landmarks near Margate
For trains, Margate station is closest to the centre. Well-known places nearby include Westwood Cross (1.6 miles south) and Public Library & Museum (Camborne) (0.5 miles north). Closer in, we work on homes, rented flats and businesses near Salmestone Primary School, Hartsdown Academy, Parish Church of St John the Baptist and Secret Spices pub. For open space, Sandwich and Pegwell Bay is close by.
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.”
Neighbourhoods we cover in Margate
Pick your area for local details, or call 07833 053749 or email us with your postcode.
- Cliftonville
- Garlinge
- Manston
- Newington
- Northdown
- Northwood
- Palm Bay
- St Peter's
- Upton
- Westbrook
- Westgate-on-Sea
- Westwood
Towns near Margate
Margate: common questions
Do you cover Cliftonville, Westbrook and Garlinge?
Yes. We cover the whole of Margate and the wider Isle of Thanet. Give us your postcode when you get in touch and we’ll arrange a visit.
My flat is in a converted Victorian house. Why does the bath keep leaking?
Timber floors in older conversions move under load, which tears an old, rigid bead. We cut it all out and reseal with flexible sanitary silicone, filling the bath first.
Can you reseal a holiday let between guests?
Yes. Tell us your booking gaps and we’ll work around them. Most sanitary silicone needs around 24 hours before the shower is used.
Why does the mastic round my sea-facing windows crack so quickly?
Wind, sun and salt spray dry out exterior sealant, and once it hardens it can’t move with the frame. A flexible weatherproof sealant at the right depth lasts much longer.
Can you seal around original timber sashes?
Yes. We’ll choose a sealant that suits both the timber and the masonry, and suggest a paintable product where the joint needs painting.
Do you work for Margate letting agents?
Yes. We reseal between tenancies and after tenants report mould or leaks, and can give one quote covering several flats.
