West Sussex · England

Mastic man in Southwick

Bath, shower and window mastic work for Southwick homes, from the streets around the Green and the Square up to the newer roads below the Downs.

  • Fully insured
  • Arbo and Everbuild sealants
  • Clear quote before we start

Mastic and sealant work in Southwick

Your local mastic man for Southwick

Southwick lies between Shoreham-by-Sea and Portslade in Adur District, with the harbour to the south, the South Downs to the north and the Green at its heart. Its homes run from mid-Victorian terraces to post-war houses and newer estates on the slope towards the hills. Mr Mastic is based in Crawley and covers Southwick for bath, shower and kitchen resealing, window and door mastic and external joints.

The town falls into three clear bands, and each has its own sealant problems. South of Brighton Road is the harbour, with industry and business. Between Brighton Road and Old Shoreham Road are older houses, and above Old Shoreham Road are the newer homes. Wherever you are, we cut out the old bead completely, clean and dry the joint and lay new sealant that suits it.

From mid-Victorian streets to homes below the Downs

Most of Southwick north of Brighton Road is residential, with houses dating from the middle of the 19th century to the 1950s. These streets have terraces and semi-detached houses, many with bathrooms that have been refitted several times. The land between Old Shoreham Road and the Downs was the last part of Southwick to be built up, and it is largely residential too, with family homes on the rising ground.

In the older houses, timber floors flex when a bath is full, so a stiff bead soon tears. We use flexible sanitary silicone and, on a bath, lay it with the bath filled, so it sits at its heaviest. Window frames here have often been replaced with uPVC, and the mastic around them is now ageing, cracking and going grey.

In the newer homes, en-suites and family shower rooms work hard, and builders’ sealant is rarely the best. If yours is splitting at the corners or lifting off the tray, our guide to leaking shower sealant explains what is going on.

Mr Mastic applicator kneeling beside a white bath, sealing the joint where the bath meets beige wall tiles
Mr Mastic applicator kneeling beside a white bath, sealing the joint where the bath meets beige wall tiles
Map of Southwick © OpenStreetMap contributors

Sea air, hill slopes and the Green

Being so close to the coast, Southwick homes face salty wind, and those higher up on the slope towards the Downs are open to the weather from several sides. External mastic on south- and west-facing frames dries out and cracks soonest. We cut out the failed joint, clean the frame and wall, use backing rod in deep gaps and apply a flexible weatherproof sealant. Our external joints page covers the gaps around sills, render and frames that we seal.

Around Southwick Green and the older streets, parking can be busy, and flats above the shops in Southwick Square are reached by side or rear doors. We plan access with you, or with the landlord or managing agent, before we come.

The Square, the harbour and local schools

Southwick Square is the town’s open-air shopping centre, with many traditional and local businesses, and south of Brighton Road the harbour area has industries and businesses of its own. Toilets, staff kitchens and washrooms in shops, workshops and offices all need resealing in time, and we can work out of hours on commercial jobs.

Southwick has several schools, including Eastbrook Primary Academy and Glebe Primary, and community buildings such as the Old Town Hall in Albion Street. We also work for landlords and letting agents with rented homes and flats across the town.

How it works

  1. Get in touch. Call or email with the job, your postcode and a few photos if you have them.
  2. Agree the price. You get a clear quote up front, and we book a date that suits you.
  3. Preparation first. Old sealant out completely, surfaces cleaned, mould treated and the joint left dry.
  4. Seal and finish. The right sealant for each joint is applied and tooled to a neat, even finish.
  5. Leave it to cure. We tell you how long to leave it before use, and the work carries our one-year guarantee.

Our services in Southwick

  • Bathroom & kitchen resealing: Bathroom and kitchen joints taken back to a clean, dry surface and finished with fresh anti-fungal silicone that won’t lift.
  • Window & door mastic: Cracked or shrunken mastic around window and door frames, sills and patio doors replaced with a weatherproof sealant.
  • 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: Failed, botched or over-sealed joints stripped out, the cause found and the joint resealed properly.
  • Fire-rated sealant: Fire-rated sealant for service penetrations and frame gaps where it has been specified, applied to the tested details.
  • External & façade joints: Brickwork movement joints, render and cladding joints resealed with backing rod and flexible exterior sealant.
  • New-build mastic & snagging: Snagging sealant for new homes and plot-by-plot mastic for builders and developers.
  • Floor & skirting joints: Gaps under skirting boards, tile movement joints and concrete floor joints sealed with a product that suits the traffic.
  • Regrouting: Crumbling grout in showers and wet areas raked out and refilled, so water stays out of the wall behind.
  • Glazing & conservatory sealant: Conservatory, rooflight, glass panel and shower screen joints resealed with glazing silicone.
  • Gutter, fascia & soffit sealing: Leaking gutter joints, end caps, fascia and soffit joints resealed with exterior sealant.
  • 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 Southwick

Southwick is just along the coast from Brighton, an easy run down the A23 from our Crawley base. Our applicators have more than 20 years’ experience, we carry full insurance and ARBOMaster approved status, and we work with Arbo and Everbuild sealants. That approach has seen us through 2,847+ projects and earned a 4.9-star Google rating from 180+ five-star reviews. We agree a clear quote before we begin, and the job comes with a one-year guarantee.

Landmarks near Southwick

For trains, Southwick station is closest to the centre. Local landmarks include Churchill Square (4 miles east) and British Engineerium (2.6 miles east). Around the centre, our work takes us to homes, rentals and businesses close to Eastbrook Primary Academy, Shoreham Academy, Shoreham College and St Michael and All Angels Church. Green spaces within reach include Shoreham Beach and Thundersbarrow Hill.

What customers say

Rated 4.9 on Google from 180+ five-star reviews. Read the reviews on Google.

★★★★★
“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!”
James & Catherine Wright, Hertfordshire
★★★★★
“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.”
David Parker, West Sussex
★★★★★
“1950s terrace on Crossways — bath had black mould coming back constantly. Mr Mastic stripped it all back and did it properly. Bathroom looks brand new.”
Paul D., Crossways, Three Bridges

Parts of Southwick we work in

Choose your part of town for local details, or call 07833 053749 or email us and tell us your postcode.

Towns near Southwick

20+ yearsMastic and sealant specialists
ARBOMaster approvedApproved applicator for Arbo sealants
Fully insuredDomestic, commercial and hotels
One-year guaranteeOn every job

Southwick: common questions

Do you cover all of Southwick?

Yes. We cover the streets around the Green and the Square, the roads above Old Shoreham Road and the harbour side, plus Shoreham-by-Sea and Portslade next door.

My Victorian house has a bath on a timber floor and the seal keeps splitting. Why?

The floor flexes when the bath is full. We use a flexible sanitary silicone and lay it with the bath filled, so it copes with the movement.

Can you replace grey, cracked mastic around uPVC windows?

Yes. We cut it out, clean the frame and wall, and reseal with a weatherproof sealant in a colour to suit.

I have a flat above a shop in Southwick Square. Can you reseal my shower?

Yes. We will plan access with you or your landlord and bring everything up in one go.

Do you work for businesses near the harbour?

Yes. We reseal staff kitchens, toilets and washrooms, and out-of-hours working can be arranged.

The shower sealant in my newer home is lifting already. Is that normal?

It is common. Builders’ sealant often fails early as a house settles. We remove it and reseal properly.

Is the work guaranteed?

Yes. Every job comes with a one-year guarantee.

Can you seal the joint where my extension meets the old house?

Yes. Joints between old and new walls move, so we clean them out and use a flexible weatherproof sealant with backing rod where the gap is deep.

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