West Sussex · England
Haywards Heath Window Mastic
Our applicators work in Haywards Heath on mastic around window and door frames, sills and patio doors. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Leaking joints at the ends of sills
- Hard, cracked sealant around windows
- A bead that does not match the frame
Landlord and commercial work in Haywards Heath
Letting agents and landlords in Haywards Heath can book us as well as homeowners. Resealing between tenancies keeps a property looking cared for before the next move-in.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
How we handle window mastic in Haywards Heath
Over two decades of sealing frames has taught us which products suit which walls. We’re fully insured ARBOMaster approved applicators, and we give a one-year guarantee on the work. If you are dealing with draughts coming in around windows and doors and gaps between the frame and the inside reveal, we can help.
In a town like Haywards Heath, the windows on the most exposed side of a house take the brunt of the rain, and that is normally where the sealant gives up first. Checking every frame, not just the obvious one, is time well spent.
All our work is covered by a 12-month guarantee.
- Where
- Haywards Heath (RH16, RH17)
- Region
- West Sussex
- Guarantee
- A year, on every job
- Price
- A clear price before work begins
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
The process
At the end, we look at the finished work together and explain the cure time. The work normally takes most of a day for a typical house, less for a few frames, depending on the size of the job. For a job in Haywards Heath, we need access to where the work is and somewhere nearby to park. If the job is outside, mention gates, side access and anything above ground floor.
- We check each frame and agree which ones need doing.
- Next the failed sealant is cut away and the joint cleaned.
- Deep gaps are filled with backing rod to set the depth.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- We clear up and check every joint is fully closed.
How to prepare
- Tell us about any water getting in
- Clear the area around the work
- Keep children and pets away from the work area
Get a quote
Asking for a quote is easy: let us know the job and the location, and roughly how big it is. Photos by email help us understand the job, and we’ll come back to you with a quote.
Read more
When it isn’t the sealant
It helps to know what we can’t do too:
- Soft or decayed wood in the frame
- Faulty window hardware
- Misting between the panes of a double-glazed unit (that needs a new unit)
Not sure which it is? You can call 0345 464 0079 or drop us an email and we will tell you honestly before you book.
Joints and surfaces we work on
- Window sills
- Patio & French doors
- Composite doors
- Aluminium frames
- uPVC windows
- Timber windows & doors
What affects the cost of window mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- Whether old sealant or filler has to be cut out
- The number of rooms or windows
- Access and height
- The number and length of the joints
The cost reflects the work involved, not guesswork. That is why we ask about the job first.
What we need to know
Before you ask for a quote, have a think about:
- The address or postcode of the job
- Pictures of the joints, sent by email
- Roughly how big the job is
- Any access issues, like height or stairs
Every job is quoted individually, so start by telling us what you need. Just call 0345 464 0079 or drop us an email with the details.
How to look after the new joints
No joint lasts for ever, but care makes a real difference. Our tips:
- Repaint timber before it’s bare
- Keep jet washers away from the mastic
- Keep solvents and bleach off the sealant
- Do not paint over the silicone
Try not to touch the new joint while it cures, following the cure time we give you. Keep jet washers away from the frames.
Wet, windy weather is when failed mastic shows itself, but resealing works best in dry conditions. Sorting cracked mastic early means the joint is sound before the bad weather.
Haywards Heath questions
Is window mastic in Haywards Heath guaranteed?
All our work, in Haywards Heath and everywhere else, comes with a 12-month guarantee. We’re fully insured, and an ARBOMaster approved applicator.
I let a flat near Haywards Heath station. Can you help?
Yes, we work for landlords and agents. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before we start.
Do you do commercial work?
Yes. We’ve worked for hotels, offices and other businesses, and we’re fully insured.
Do you work on first-floor windows?
Yes, if safe access is possible. For high or awkward windows, we will tell you what access is needed.
Are you insured?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
Where do you work from?
Our base is in Crawley, West Sussex, and we work across South East England, London and Scotland.
Is the new sealant paintable?
Not usually, if it’s silicone. Tell us your decorating plans and we’ll pick a sealant to suit.
Can I add another job to the visit?
Yes, and it often makes sense. Combining jobs makes good use of the visit.
Why deal with it now?
A cracked joint around a frame lets rain into the wall. Left long enough, it can stain inside walls, spoil plaster and rot wooden frames. A reseal is a much smaller job. Draughts from a gap round a frame, damp under a sill or water behind a bath panel all start small, and early is when they’re cheapest and quickest to sort.
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part.
Why Haywards Heath customers choose us
- Sanitary silicone with an anti-fungal additive in wet areas
- More than 20 years in sealant work
- We’re fully insured
- Trusted Arbo and Everbuild sealants
See how sealant jobs are priced and our reviews.
Places near Haywards Heath
Other services in Haywards Heath
Frames and glazing around Haywards Heath
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Ockenden Manor (about 2.1 miles west) are a reminder that the area around Haywards Heath has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
Homes close to Church of the Presentation include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. Managing a site like Warden Park Primary Academy? Then the mastic around its windows and doors needs looking after like any other building’s. Letting a property close to Haywards Heath station? Then cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Haywards Heath is about 9 miles south-east of Crawley, in West Sussex. Haywards Heath gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. Our West Sussex coverage runs to 371 places, and Haywards Heath is one of them. We also work in Crawley, about 9 miles from Haywards Heath.
Work in RH16 and RH17 is quoted and booked the same way as anywhere else. That includes homes and businesses on Church Road, Market Place and High Street and the roads around them. Being close to the A272 and B2028, Haywards Heath is easy for our applicators to reach for window mastic. If you’re just outside Haywards Heath, we cover Scaynes Hill (2 miles east), Wivelsfield (2 miles south), Wivelsfield Green (3 miles south-east), Ditchling Common (4 miles south) and North Chailey (4 miles south-east). Further out, we also cover Crawley (9 miles north-west), Horsham (11 miles north-west), Burgess Hill (3 miles south-west), East Grinstead (10 miles north-east), Shoreham-by-Sea (14 miles south-west) and Lancing (15 miles south-west). As one of the bigger places in West Sussex, Haywards Heath has every kind of property, from flats to offices.
Local landmarks in Haywards Heath
Typical jobs here are in homes near The Heath Tavern, Scrase Valley and Tavistock and Summerhill School. Haywards Heath’s nearest station is Haywards Heath station, roughly 0.6 miles north-west of the centre. Other landmarks nearby include Waterbury Castle (3.8 miles north-east) and St Francis & Hurstwood Park Hospital Museum (0.8 miles north). For a walk, there’s Ashenground and Bolnore Woods.
Should I try it myself first?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.