Kent · England
Mystole Window Mastic
Mastic around window and door frames, sills and patio doors for homes and businesses in Mystole and across Kent. Fully insured, ARBOMaster approved and guaranteed for a year.
- Mastic that has split away from the wall
- Gaps between the frame and the inside reveal
- Sealant in the wrong colour for the frame
Window mastic in Mystole, done properly
Around Mystole we seal all kinds of frames: uPVC, aluminium, timber and composite, plus patio doors, French doors and sills. The sealant is chosen to suit the frame material and the wall. We work on patio & French doors, uPVC windows and window sills, and people most often call us about water coming in at the bottom corners of a door and untidy mastic left by window fitters.
In a village or hamlet like Mystole, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these don’t always suit modern silicone, and sometimes a traditional sand mastic is the better choice.
Each job carries a 12-month guarantee, large or small.
- Place
- Mystole (CT4)
- Wider area
- Kent
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Leave it or put it right?
Once mastic fails, rain can get between the frame and the wall. Left long enough, it can stain inside walls, spoil plaster and rot wooden frames. Resealing now is a small job by comparison. In a small place like Mystole, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
What you pay reflects the work, not a rough estimate. That’s why we ask about the job first and agree the price before starting.
Why Mystole customers choose us
- You choose the colour before work begins
- Trusted Arbo and Everbuild sealants
- A sealant colour to suit the surroundings
- Anti-fungal silicone where joints get wet
See what affects the cost and what customers say.
Mystole: your questions answered
Do you cover smaller places like Mystole?
Yes. Mystole is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can you help a landlord with a rental near Chartham station?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before work begins.
What do you put in the joint?
The product depends on the job: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. We use products from Arbo and Everbuild.
Can you seal over the old sealant?
No, and we never do. It may look fine at first, but the new layer lifts away from the old one. The old sealant has to come out completely.
How many windows can you do in a day?
Allow a morning for a couple of windows and a door. Access and the amount of old mastic make the biggest difference.
Is it worth trying it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. Most DIY failures come from sealing over old material, wet joints or too much sealant.
How long before the joint can be used?
It depends on the product and the conditions. Before we leave, we will tell you the cure time.
Do you seal inside as well as outside?
Yes. Outside is the weather seal; inside closes the gap to the plaster. We do one or both.
Mystole homes and the weather
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For site and facilities teams at buildings such as Chartham Primary School, larger buildings have plenty of frames, and the mastic around each one ages. Letting a property close to Chartham station? Then cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Mystole is about 4 miles south-west of Canterbury, in Kent. Every kind of property in Mystole can book us for window mastic, old or new, large or small. Every job comes with our one-year guarantee. Mystole is one of 922 places in Kent where we work. Chelmsford is on our list too, about 41 miles from Mystole.
Here we cover the CT4 postcode area for window mastic. Streets in the area include Thruxted Lane and Mystole Lane, all of which we cover. We also cover the places around Mystole: Shalmsford Street (1 mile east), Chartham (1 mile north-east), Garlinge Green (1 mile south-east), Chartham Hatch (2 miles north) and Petham (2 miles south-east). Within a short drive, we also cover Ashford (9 miles south-west), Canterbury (4 miles north-east), Dover (15 miles south-east), Sittingbourne (13 miles north-west), Folkestone (13 miles south-east) and Whitstable (7 miles north).
Around Mystole
In Mystole, that means homes and buildings near Broadham Down and Cross Keys Public House, among other places. The closest station to Mystole is Chartham station, about 0.9 miles north-east. Well-known places in the area include Whitefriars Shopping Centre (3.9 miles north-east) and Chilham Castle (1.9 miles west). The countryside around Mystole includes Blean Woods RSPB Reserve.
Work for landlords, hotels and businesses
For anyone letting property in or around Mystole, several properties can be quoted together. Send us the addresses and the work at each, and pictures by email help.
We work for landlords and agents as well as householders. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
Nearby places to Mystole
Other services in Mystole
What affects the quote in Mystole
We do not publish a price list, because jobs vary so much. What we look at:
- How many areas need sealing
- Mould in or behind the old joints
- Working hours on commercial sites
- How easy the joints are to reach
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, plus any working-time requirements on site. Ask us for a quote and we’ll go through it with you.
What to tell us for a quote
Photos by email are helpful but not essential. Try to tell us:
- What the problem is, such as mould, gaps, leaks or cracking
- Pictures of the joints, sent by email
- If someone has resealed it before
- If it’s domestic, commercial or a hotel
Getting a quote is simple: tell us what needs doing and where and its rough size. Photos by email help us understand the job, and we will come back to you with a quote.
Common problems we fix in Mystole
Mastic ages in the weather. Sunlight dries the surface out, and over the years it loses its give, cracks and comes away.
Any of these means the joints need attention:
- Gaps where the sill meets the wall
- Cracked internal joints between frame and plaster
- Black, perished sealant on frames
- Cold air getting in at the frame edge
Homes close to Church of St Mary include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame.
What your quote should include
- Whether they’re fully insured
- What happens if the job turns out different
- Which colour the sealant will be
- How the joint is cleaned and prepared
Aftercare tips
Good habits help new joints last longer. Our tips:
- Make sure the drainage slots aren’t blocked
- Don’t aim a pressure washer at the joints
- Don’t paint over the silicone
- Keep paint and stain on wooden frames in good order
Timber frames need their paint kept up, since wood that gets wet swells and shrinks more. Paint up to the joint, not over the silicone.
Look out for the warning signs: cracks in the mastic, gaps you can see light through, damp on the reveal or mould around the inside of the frame. If you notice one, it’s time to get the joint looked at.
What we do, step by step
All our tools and materials come with us in the van, so there’s nothing for you to buy. Once we’ve agreed what’s being done, the area is protected and the work begins. Most jobs take a morning for a couple of windows and a door. Somewhere as small as Mystole, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We check each frame and agree which ones need doing.
- 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.
Before we arrive
- Keep children and pets away from the work area
- Mention any parking rules near the property
- Tell us about any previous sealing or DIY attempts
How to get a quote
Every job is quoted individually, so the first step is telling us about yours. Simply call 0345 464 0079 or send us an email and describe the job.
Related advice
Can I do it myself?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.