Kent · England
Window Mastic in Keycol
Window mastic for Keycol and the surrounding area: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Sealant in the wrong colour for the frame
- Leaking joints at the ends of sills
- Untidy mastic left by window fitters
Leave it or put it right?
Running fresh sealant over the old joint is tempting, but it will not grip old, dirty sealant. It soon lifts and the leak carries on behind it. The old mastic has to come out. Older cottages and farmhouses around Keycol can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
A failed joint rarely gets cheaper to fix by waiting. If you’re not sure whether it needs doing, phone 0345 464 0079 or drop us an email for an honest opinion and a quote.
Why Keycol customers choose us
- Colour picked to suit the job
- Homes, businesses and hotels
- White, clear, grey or another colour, product permitting
- Neat joints and a tidy finish
Take a look at our cost guide or our reviews.
About our window mastic in Keycol
There are two joints on most windows. Outside, the mastic keeps rain out; the internal joint closes the gap to the plaster and stops draughts. Either or both can be done. We are often asked to deal with cracked sealant at the sill ends and draughty joints inside around the window, across composite doors, patio & French doors and window sills.
Mastic can only go onto a dry, clean joint, so window work in Keycol is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
All our work is covered by our one-year guarantee, wherever you are in Kent.
- Place
- Keycol (ME9)
- Region
- Kent
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Quotes for window mastic in Keycol
We quote each job individually. This is what makes a difference:
- Access and height
- The size of the job
- How many areas need sealing
- Any working-time requirements on site
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote and we’ll talk you through it.
What we need to know
There’s no need for technical detail. It helps if you can tell us:
- If it’s domestic, commercial or a hotel
- What’s wrong with the joints now
- Whether it has been sealed before
- A few photos by email, if you can
For window mastic in Keycol, call 0345 464 0079 or send us an email. Tell us what the problem is and where, and you will get a clear quote before we start.
Questions from Keycol
Does living near the coast affect window mastic in Keycol?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. The right product, a clean joint and the right depth all help it cope.
I let a flat near Newington station. Can you help?
Yes. We work for landlords and agents as well as householders. You can ring 0345 464 0079 or send us an email with the details for a clear quote.
How many windows can you do in a day?
The work takes a few hours for a handful of frames, longer for a whole house. Access and the amount of old mastic make the biggest difference.
Can you reach windows above the ground floor?
Yes, as long as they can be reached safely. Let us know about access when you ask for a quote and we’ll plan for it.
Can resealing stop a draught around my window?
Often, yes. Air often gets in between the frame and the wall, and resealing inside and out closes it.
Where are you based?
We work from Crawley. We cover Keycol and the rest of Kent, along with the rest of our area.
Can I add another job to the visit?
Yes. More than one area can go on one quote.
Can you do the inside joint as well?
Yes. The outside joint keeps the weather out, and the inside joint stops draughts and finishes the reveal. We can do either or both.
Towns and villages near Keycol
Other services in Keycol
The process
Good joint work is mostly preparation, so that is where we spend the time. Joints are cleaned back and dried before anything new goes in. In total, it usually takes a few hours for a few frames, or a day or more for a whole house. In a small place like Keycol, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by checking each window and door with you.
- We remove the old mastic and clean the frame and the wall.
- 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.
- Every joint is checked before we leave.
Getting ready for the visit
- Tell us if parking is tricky
- Tell us about any previous sealing or DIY attempts
- Mention any leaks or damp you’ve noticed
Getting a quote
Call for a quick quote, or email us if that’s easier. Tell us about the joints that need doing and we’ll explain what’s involved.
Read more
How the job changes by surface
Patio & French doors
Door frames take knocks and movement every time the doors are used. The sealant must cope with it.
Timber windows & doors
Where timber has rotted at the joint, it needs repairing first. We’ll point out any rot we find, as a joiner will need to deal with it.
Keeping the joints in good condition
How long the joints last depends on use and care. Here’s what we suggest:
- Do not aim a pressure washer at the joints
- Air rooms to keep condensation down around windows
- Walk round the house once a year and look at the joints
- Wash the frames with mild soapy water
Most silicone sealants won’t take paint, so mention any painting plans before we start. We can use a paintable sealant where that matters.
Water trapped behind a failed joint can start rot in timber frames and sills. Rotten timber needs a joiner, not a sealant, so early resealing is worth it.
DIY versus a professional finish
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
Frames and glazing around Keycol
Keycol is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That’s hard on the mastic around window and door frames, especially on the side facing the sea. The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Schools such as Borden Church of England Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s. Rented homes near Newington station change hands often, and sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. Homes close to Church of St Bartholomew include some older properties, and the joint between an old wall and a newer frame is normally the first place rain gets in.
Keycol is about 2 miles west of Sittingbourne, in Kent. Jobs in Keycol get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. Across Kent, we cover 922 places, and Keycol is one of them. We also work in Chelmsford, around 28 miles away.
All of ME9 is within our area for window mastic, from the main roads to the quietest streets. Window mastic is available to properties on Rooks View, Hill Farm View and Rook Lane and the roads around them. If you are just outside Keycol, we cover Bobbing (1 mile east), Chestnut Street (1 mile south), Newington (1 mile west), Danaway (1 mile south-west) and Oad Street (2 miles south). Within a short drive, we also cover Maidstone (9 miles south-west), Gravesend (15 miles north-west), Whitstable (15 miles east), Faversham (9 miles east), Minster (7 miles north-east) and Kings Hill (13 miles south-west).
Landmarks near Keycol
Around Keycol, our work takes us to homes and buildings near Westlands School and George Inn. The closest station to Keycol is Newington station, roughly 1.1 miles west. Nearby you’ll also find Court Hall Museum (1.8 miles east) and Bayford Court (2.3 miles east).
Landlords, agents and businesses in Keycol
Failed sealant is one of the commonest items on a check-out report. Several properties can be quoted together.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.