Windsor and Maidenhead · England
Mastic man in Windsor
Resealing and window mastic for Windsor’s 19th-century streets, Clewer and Dedworth family homes, riverside flats, hotels and guest accommodation.
- Fully insured
- Arbo and Everbuild sealants
- Clear quote before we start
Your local mastic man for Windsor
Most of Windsor’s streets date from the middle and later 19th century, laid out below the castle and down towards the Thames. Around them are the older settlements the town has absorbed, including Clewer and Dedworth, with Eton across the bridge and Old Windsor to the south. Mr Mastic covers all of Windsor from our base in Crawley.
We reseal baths, showers and kitchens, renew window and door mastic, and look after bathrooms in hotels, guest houses and rented homes. Every job starts with removing the old sealant completely, because fresh silicone laid over old won’t stick for long. Our guide to mouldy sealant explains why black spots come back and how to stop them.
Victorian terraces, Clewer, Dedworth and the town centre
The town centre and the streets around it are mainly Victorian, with older landmarks such as the Guildhall, built between 1680 and 1691, and Hadleigh House on Sheet Street, from 1793. Terraced and townhouse streets here often have sash windows, either original timber or uPVC replacements, and many larger houses have been converted into flats. Around timber frames we use flexible sealants that suit both frame and wall, and paintable products where the joint is to be painted.
West of the centre, Clewer and Dedworth have a different feel. Clewer, also known as Clewer Village, covers three wards of the borough. Dedworth, the most westerly part of Windsor, is mostly semi-detached housing in 1950s to 1980s styles. In these homes, bathrooms and kitchens have usually been refitted, and the jobs we see are discoloured bath seals, gaps behind shower trays and hardened window mastic.
Flats near the river and in the centre range from conversions to newer purpose-built blocks. Wherever the shower sits above someone else’s ceiling, a sound seal matters. Our wet room sealing page covers the extra care level-access showers need.
Period sashes, converted flats and the riverside
In converted Victorian houses, bathrooms are often squeezed into former bedrooms or landings, with the bath on timber boards that flex. That movement tears a stiff seal, so we use a flexible sanitary silicone and fill the bath before sealing. Access can be up several flights of narrow stairs, and town-centre parking is tight, so we plan the visit and arrange access with managing agents where needed.
Homes along the Thames Promenade and near Alexandra Gardens face damp air from the river, and the sealant around their windows and doors dries and cracks faster on exposed sides. We cut out failed joints, check sills and the joints beneath them, and use weatherproof sealant with backing rod in deeper gaps.
Hotels, guest houses and short lets
Windsor is a busy visitor town with several substantial hotels, a theatre, and shops and restaurants along Peascod Street and at Windsor Royal Station. Hotel and guest-house bathrooms are used by a new guest every night or two, and tired sealant is one of the first things guests notice. We reseal room by room so the rest stay bookable; our article on resealing hotel bathrooms explains how.
Restaurant kitchens and toilets need hygienic seals, and landlords with flats or short lets can book us between guests or tenancies.
How it works
- Call or email. Tell us what needs doing, where it is and anything about access. Photos by email help.
- 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.
- Seal and finish. The right sealant for each joint is applied and tooled to a neat, even finish.
- Cure and guarantee. We tell you when it can be used, and every job has our one-year guarantee.
Sealant services across Windsor
- 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: Shower and splashback grout replaced where it has cracked or stained, with silicone in the movement joints.
- Glazing & conservatory sealant: Leaking conservatory and rooflight joints, glass panels and shower screens resealed with silicone made for glass.
- 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: Old sand mastic around sash windows and doors raked out and renewed with traditional burnt sand mastic.
Why choose Mr Mastic in Windsor
From Crawley, Windsor is a straightforward run round the M25, and we plan visits around the town’s traffic and parking so the work isn’t held up. Every job is handled by people with over 20 years of sealant experience. We are fully insured and ARBOMaster approved, and we use Arbo and Everbuild sealants. We have 2,847+ projects behind us and a 4.9-star Google rating from more than 180 five-star reviews. You’ll get a clear quote before we begin and a one-year guarantee when we’re done.
Around Windsor
From the centre, the nearest railway station is Windsor & Eton Central station. Places most people will know nearby are Berkshire Yeomanry Museum (1 mile south-east) and Windsor Castle (1.3 miles east). Around the centre, our work takes us to homes, rentals and businesses close to St Edward's Catholic First School, Windsor Girls' School, Windsor Girls' School and All Saints Church. Green spaces within reach include Bray Pit and Taplow Lake.
What customers say
Rated 4.9 on Google from 180+ five-star reviews. Read the reviews on Google.
“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.”
“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!”
Where we work in Windsor
Pick your area for local details, or call 07833 053749 or email us with your postcode.
Nearby towns we cover
Your questions about mastic work in Windsor
Do you cover all of Windsor?
Yes. We cover the whole town, including the centre, Clewer, Dedworth and the riverside, plus Eton, Old Windsor, Datchet and Oakley Green.
Can you reseal a hotel without closing every room?
Yes. We work room by room so the others stay in use, and out-of-hours working can be arranged.
I have a flat in a converted Victorian house. Why does the bath seal keep tearing?
Timber floors flex when the bath is used, and a stiff seal can’t cope. We reseal with the bath filled, using a flexible sanitary silicone.
Can the sealant around my timber sash windows be painted?
Silicone can’t be painted. Where the joint needs painting, we’ll suggest a suitable paintable sealant.
My house in Dedworth still has its original window mastic. Should it be replaced?
If it has gone hard, cracked or is coming away from the frame, yes. Fresh flexible mastic keeps rain out of the joint.
Can you reseal a short-let flat between guests?
Yes. We can fit the job into a gap between bookings, and we’ll tell you how long it needs before the next guest arrives.
Do you reseal kitchens in guest houses and B&Bs?
Yes. We reseal worktops, sinks and splashbacks with a hygienic sealant and can work around breakfast service.
How long does a typical shower reseal take?
Most take a few hours, including removing the old sealant. Allow around 24 hours before using the shower.