West Sussex · England
Selsey Window Mastic
We cover Selsey for mastic around window and door frames, sills and patio doors. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Rain getting in at the frame or under the sill
- Whistling draughts around closed windows
- Cracked internal joints between frame and plaster
What we are called out for in Selsey
Timber windows bring their own problems. Old mastic gets painted over and cracks under the paint, and the wood moves with damp as well as heat.
If you can see any of these, it’s time to have the joints looked at:
- Old mastic that has gone black or come away
- Gaps left after new windows were fitted
- Sealant in the wrong colour for the frame
- Cracked internal joints between frame and plaster
For site and facilities teams at buildings such as Seal Primary Academy, the mastic around its windows and doors needs looking after like any other building’s.
Before booking anyone
- What guarantee comes with the work
- Which colour the sealant will be
- Which sealant they’ll use, and why
- What insurance they hold
Window mastic in Selsey
Whether it’s one leaking patio door or every frame on the house, the work is priced before anything is done. Just phone 0345 464 0079 or email us and tell us how many frames there are and how they’re reached for window mastic in Selsey. Common call-outs are for a bead that doesn’t match the frame and damp patches on the reveal after heavy rain, on timber windows & doors, patio & French doors and aluminium frames.
In a town like Selsey, the windows on the most exposed side of a house take the brunt of the rain, so the mastic there tends to fail first. It’s worth looking at every frame, not just the one that leaks.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Place
- Selsey (PO20)
- Region
- West Sussex
- Cover
- One year on every job
- Quotes
- A clear price before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Should I try it myself first?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
What else we do in Selsey
How the visit works
Good joint work is mostly preparation, and we do not rush it. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours for a handful of frames, longer for a whole house. For a job in Selsey, we need access to where the work is and somewhere nearby to park. For outside work, let us know about side access, gates and any upper-floor joints.
- We start by checking each window and door with you.
- Next the failed sealant is cut away and the joint cleaned.
- We fit backing rod in deep gaps so the sealant is the right depth.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- We clear up and check every joint is fully closed.
Preparing for the visit
- Mention any parking rules near the property
- On commercial sites, let us know about site rules
- Mention any tricky access
How to get a quote
Every job is quoted individually. Simply phone 0345 464 0079 or send us an email and describe the job and send photos if you have them.
Advice
For landlords and businesses
Mouldy or split sealant often shows up at the end of a tenancy. Several properties can go on one quote.
Whether it’s one flat or a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
How to look after the new joints
No joint lasts for ever, but care makes a real difference. Our tips:
- Keep paint and stain on wooden frames in good order
- Look round the frames every year or so
- Ventilate rooms so frames do not stay wet inside
- Do not paint over the silicone
A yearly look round the frames is enough. Cracks and lifting edges are easy to spot early, and if anything looks wrong, just call 0345 464 0079 or send us an email.
Wet, windy weather is when failed mastic shows itself, but sealant goes on best when frames and walls are dry. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.
Selsey: your questions answered
Do you cover Selsey for window mastic?
Yes, Selsey is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or drop us an email and let us know what needs doing.
Is there a guarantee on window mastic in Selsey?
Every job comes with our 12-month guarantee, wherever it is. We’re also fully insured and ARBOMaster approved.
Can you get sealant to suit coloured frames?
Usually, yes. Mention the frame colour when you ask for a quote and we’ll use the nearest match.
Will there be a smell?
It depends on the product. Some smell for a while, some hardly at all.
How many windows can you do in a day?
That depends on the number of frames, how they’re reached and the state of the old mastic. We’ll tell you how long your job needs when we quote.
Is it OK to seal over old sealant?
No. Fresh sealant doesn’t stick to old sealant, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
Do you take out the old sealant first?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
Will you leave a mess?
No. We protect the surfaces around the joints, and we tidy up before we go.
Why deal with it now?
Draughts and leaks do not always mean new windows. Where the frames are sound, new mastic generally deals with draughts and leaks at the edges. If we find failed glass units or worn seals, we’ll tell you. Around Selsey, failed sealant lets water into hidden places, such as under the floor, behind a panel or into a wall. Left alone, that means rot, damp and a bigger repair.
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs. Ask us for a quote and we will explain what it covers.
Why choose Mr Mastic in Selsey
- Anti-fungal silicone where joints get wet
- Colour agreed with you before any work starts
- Trusted Arbo and Everbuild sealants
- ARBOMaster approved applicator
Read our cost guide or our reviews.
Windows and doors in Selsey
Selsey is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on the mastic around window and door frames, which can dry out and crack sooner where a building faces the weather. Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you live in an older home near St Peter's Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Selsey is about 6 miles south-west of Bognor Regis, in West Sussex. Selsey gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Selsey is one of 371 towns and villages in West Sussex where we work for window mastic. Our Portsmouth page covers work nearby (14 miles or so).
Work in PO20 is quoted and booked the same way as anywhere else. Local streets include Church Road, High Street and Ellis Square, all of which we cover. Selsey is on the B2145, which makes it straightforward to reach. We also cover the places around Selsey: Church Norton (1 mile north-east), Keynor Estate (2 miles north), Sidlesham (3 miles north), Pagham (3 miles north-east) and Street End (4 miles north). We also work in nearby towns such as Bognor Regis (6 miles north-east), Chichester (7 miles north), Littlehampton (12 miles north-east), Emsworth (10 miles north-west), Rustington (13 miles north-east) and Angmering (15 miles north-east). Being one of West Sussex’s larger places, Selsey has every kind of property, from flats to offices.
Landmarks near Selsey
Locally, jobs take us to homes and businesses close to The Academy, The Fisherman's Joy Public House and The Academy and the streets around them. Other landmarks nearby include Selsey Lifeboat Museum (0.5 miles south-east).
Honest limits
New sealant can’t fix everything, and we will tell you before any work starts. Sealant won’t put right:
- Faulty window hardware
- Damp problems in the wall away from the window
- Misting between the panes of a double-glazed unit (that needs a new unit)
If you’re not sure, just call 0345 464 0079 or email us and we will give you a straight answer before booking.
What we seal
- Patio & French doors
- Composite doors
- Window sills
- Timber windows & doors
- uPVC windows
- Aluminium frames