East Sussex · England
Blackboys Window Mastic
Professional window mastic in and around Blackboys, with every bit of old sealant taken out first and a 12-month guarantee.
- Draughty joints inside around the window
- Mastic that’s falling out in pieces
- Rain getting in at the frame or under the sill
Window mastic for homes and businesses in Blackboys
Colour matters on a frame. White, brown, anthracite grey, black and clear sealants are all available, so the bead blends with the window rather than framing it. If you have cold air getting in at the frame edge and hard, cracked sealant around windows, we can put it right.
Outdoor sealant needs dry, clean surfaces, so work on frames around Blackboys is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
All of our work is guaranteed for twelve months.
- Place
- Blackboys (TN22)
- Region
- East Sussex
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Questions from Blackboys
Is Blackboys within the area you cover?
Yes, Blackboys is covered. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
I let a flat near Buxted station. Can you help?
Yes, landlords and agents are among the people we work for. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
Where is Mr Mastic based?
Our base is Crawley. We work across South East England, London and Scotland.
Will the old sealant be removed?
Yes. All of the old material is cut out and the joint cleaned before resealing.
Can I add another job to the visit?
Yes, and it often makes sense. Doing several areas at once is normally more efficient.
Do you work on first-floor windows?
Yes, in most cases. Access is planned before any work starts, so mention the height and anything in the way.
Can you do the inside joint as well?
Yes. Outside is the weather seal; inside closes the gap to the plaster. We do one or both.
Do you guarantee window mastic?
Yes. All our work carries a 12-month guarantee, and we are fully insured.
Signs you need window mastic in Blackboys
Joint shape matters as much as the product. A thin smear across a wide gap has nothing to it, while a joint packed solid can’t stretch. That’s what backing rod is for.
Look out for any of the following:
- Rain getting in at the frame or under the sill
- Draughty joints inside around the window
- Old mastic that has gone black or come away
- A bead that does not match the frame
Managing a site like Blackboys Church of England Primary School? Then the mastic around its windows and doors needs looking after like any other building’s.
Before booking anyone
- What insurance they hold
- How long the guarantee is
- Is the old sealant removed completely?
- How hidden problems are handled
Windows and doors in Blackboys
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Rented homes near Buxted station change hands often, and renewing tired window mastic between tenants heads off draught and damp complaints.
Blackboys is about 3 miles east of Uckfield, in East Sussex. If you need window mastic in Blackboys, please phone 0345 464 0079 or send us an email for a quick quote. We cover East Sussex from our Crawley base. Across East Sussex, we cover 289 places, Blackboys among them. You can also see our page for Brighton, roughly 16 miles from Blackboys.
Postcode districts we cover here for window mastic: TN22. If you need window mastic at a property on High Street, Mount Pleasant and Gun Road or anywhere close by, we can help. Blackboys is on the B2102, so it’s easy for us to get to with everything needed for window mastic. Neighbouring places we cover for window mastic include Etchingwood (1 mile north-west), Framfield (1 mile west), Potter's Green (2 miles north-west), Buxted (2 miles north-west) and Hadlow Down (2 miles north). Larger places within reach include Eastbourne (13 miles south-east), Bexhill-on-Sea (15 miles south-east), Seaford (13 miles south), Lewes (9 miles south-west), Hailsham (8 miles south-east) and Crowborough (6 miles north).
Near you in Blackboys
In Blackboys, that means homes and buildings near Blackboys Inn and Passingworth Park and the streets around them. For rail, the closest station is Buxted station, about 2.3 miles north-west. Other landmarks nearby include Uckfield Community Hospital (2.6 miles west) and Sussex Farm Museum (3.9 miles south-east). For a walk, there’s Selwyns Wood.
What we do, step by step
We bring everything the job needs with us, so you do not need to buy or prepare anything. Once we have agreed what’s being done, the area is protected and the work begins. Most jobs take a few hours for a few frames, or a day or more for a whole house. Somewhere like Blackboys needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- First we look at every frame and agree the list.
- We remove the old mastic and clean the frame and the wall.
- Deep gaps are filled with backing rod to set the depth.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- Every joint is checked before we leave.
Before we arrive
- Tell us about access, such as stairs, a lift or high-level joints
- Tell us about any water getting in
- Clear items away from the joints we are working on
Get a quote
For a quick quote, get us on the phone, or email us if that is easier. Tell us about the joints that need doing and we’ll explain what’s involved and give you a clear quote.
Related advice
Towns and villages near Blackboys
What else we do in Blackboys
What happens if it’s left?
A quick bead over the top of old mastic looks like an easy fix, but it will not grip old, dirty sealant. It soon lifts and the leak carries on behind it. Proper resealing starts with removing the old joint. In a small place like Blackboys, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, along with when we can work on site. Call for a quick quote and we’ll explain what it covers.
Why Blackboys clients choose us
- Anti-fungal silicone where joints get wet
- Sealant colour chosen to suit
- You choose the colour before work begins
- We leave the area clean and tidy
DIY sealant or a professional job?
If you’ve already had a go yourself, that’s fine. We cut it out and start again.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Work for landlords, hotels and businesses
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. Several properties can go on one quote.
If you manage several properties in or around Blackboys, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs, and pictures by email help.
How to look after the new joints
Simple care keeps the joints in good condition. We recommend:
- Repaint timber before it’s bare
- Keep jet washers away from the mastic
- Clear any debris from frame drain holes
- Keep paint off silicone joints
Wipe the frames with soapy water when you clean the windows, and avoid solvent cleaners on the sealant.
Draughts get worse, not better. As old mastic keeps shrinking, the gap widens, and heat escapes around the frame. Resealing closes it.
Surface by surface
uPVC windows
Plastic frames move a lot between a hot afternoon and a cold night, so the joint needs a low-modulus sealant that stays flexible. White is the usual colour, with brown, anthracite grey and black for coloured frames.
Aluminium frames
Aluminium moves with heat, and the frames are often slimmer than uPVC. A tidy bead in anthracite grey, black or a matching colour keeps the clean look.