Kent · England
Window Mastic in Thanington
Window mastic for Thanington, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Whistling draughts around closed windows
- Untidy mastic left by window fitters
- Mastic that’s falling out in pieces
Window mastic in Thanington
Behind a thin line of old mastic there’s sometimes a deep void. Packing it solid with sealant gives a joint that cannot flex, so deep gaps get backing rod first. The sealant then grips the two sides it should. We work on composite doors, timber windows & doors and aluminium frames, and the jobs we see most are old mastic that has gone black or come away and untidy mastic left by window fitters.
In a smaller place like Thanington, some walls face open ground and catch the full force of the weather. That’s hard on the mastic around frames and sills.
Our work is backed for twelve months, in Thanington and everywhere else we cover.
- Where
- Thanington (CT1, CT2)
- Region
- Kent
- Cover
- One year on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
How we quote for window mastic
The price is agreed before any work begins. It takes into account:
- The amount of work
- Which sealant suits the joint
- How easy the joints are to reach
- Any working-time requirements on site
We do not show prices on the website, because the cost depends so much on the job itself. Call for a quick quote.
Helping us quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- The address or postcode of the job
- What’s wrong with the joints now
- Pictures of the joints, sent by email
- If someone has resealed it before
We quote each job on its own, so start by telling us what you need. Simply phone 0345 464 0079 or send us an email and describe the job, and photos are welcome.
What window mastic looks like in Thanington
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.
For site and facilities teams at buildings such as The Canterbury Primary School, the mastic around its windows and doors needs looking after like any other building’s. For landlords with property near Canterbury East station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Thanington is about 1 mile south-west of Wincheap, in Kent. Whether you’re in the middle of Thanington or further out, we cover window mastic for every kind of property, from flats and houses to offices and hotels. Across Kent, we cover 922 places, Thanington among them. Our Chelmsford page covers work nearby, about 41 miles away.
Here we cover the CT1 and CT2 postcode area for window mastic. If you need window mastic at a property on Godwin Road, Bell Avenue and Ashford Road or anywhere close by, we can help. We also cover Wincheap (1 mile north-east), Stuppington (1 mile south-east), Harbledown (1 mile north), Canterbury (1 mile north-east) and Upper Harbledown (1 mile north-west). We also work in nearby towns such as Ashford (12 miles south-west), Dover (14 miles south-east), Sittingbourne (15 miles west), Folkestone (14 miles south), Whitstable (6 miles north) and Deal (15 miles east).
Near you in Thanington
Locally, jobs take us to homes and businesses close to The Canterbury Academy, Duke's Head Public House and Whitehall Meadows, among other places. For rail, the closest station is Canterbury East station, about 1 mile north-east of the centre. Other landmarks nearby include Whitefriars Shopping Centre (1.2 miles north-east) and Canterbury Castle (1 mile north-east). Open spaces near Thanington include Blean Woods RSPB Reserve.
Towns and villages near Thanington
Also in Thanington
Landlord and commercial work in Thanington
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
Landlords and letting agents in Thanington can book us as well as householders. Resealing between tenancies keeps a property looking cared for before the next move-in.
The process
We work through the job in order: protection first, then preparation, sealing and a tidy-up. For most jobs that takes a morning for a couple of windows and a door and we leave things clean and tidy. A visit to Thanington is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- Each frame is looked over and we agree which ones need resealing.
- We remove the old mastic and clean the frame edge and wall.
- Where the gap is deep, backing rod goes in first.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- We tool each bead neatly and check every joint is closed.
How to prepare
- For indoor joints, keep the area dry beforehand if you can
- Let us know about parking restrictions
- Let us know if you’ve seen damp or leaks
How to get a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will talk you through what we’d do. When it suits you, call 0345 464 0079 or send us an email.
Related advice
When it is not the sealant
Some problems need a builder, plumber or other trade rather than us:
- Condensation trapped between the panes
- Broken hinges, locks or handles
- Rotten timber, which needs a joiner first
If in doubt, phone 0345 464 0079 or drop us an email and we will say what we think.
Surfaces we seal
- uPVC windows
- Patio & French doors
- Composite doors
- Window sills
- Aluminium frames
- Timber windows & doors
FAQs for Thanington
Do you work for landlords with property near Canterbury East station?
Yes, we work for landlords and agents. Just ring 0345 464 0079 or email us and tell us about the property, and we’ll give you a clear quote.
Can you do window mastic in Thanington?
Yes, Thanington is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or drop us an email and let us know what needs doing.
Is the new sealant paintable?
It depends on the sealant. Silicone isn’t paintable, but some hybrid sealants are. Mention any painting plans before any work starts.
Do you guarantee window mastic?
Yes. Our one-year guarantee covers every job, inside or out.
Can I do it myself?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
Is there any odour?
Possibly a little. Any smell clears as the sealant cures.
Can you match the sealant to my frames?
Yes, in most cases. Mention the frame colour when you ask for a quote and we’ll use the nearest match.
Where is Mr Mastic based?
Our base is in Crawley, and we work across South East England, London and Scotland.
How to look after the new joints
Aftercare is simple, and it makes a real difference:
- Don’t aim a pressure washer at the joints
- Walk round the house once a year and look at the joints
- Keep paint off silicone joints
- Keep paint and stain on wooden frames in good order
Wipe the frames with soapy water when you clean the windows, and keep solvents and harsh chemicals off the joint.
A small gap around a frame only grows. As old mastic keeps shrinking, the gap widens, and heat escapes around the frame. A new joint closes it up.
DIY sealant or a professional job?
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
What we are called out for in Thanington
On timber frames, paint and putty build up around the joint. Mastic painted over many times cracks with the paint, and the wood moves with damp as well as heat.
Look out for any of the following:
- Gaps left after new windows were fitted
- Hard, cracked sealant around windows
- A bead that does not match the frame
- Cold air getting in at the frame edge
If you live in an older home near Church of St Nicholas, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
What your quote should include
- How much experience the applicator has
- The length of the guarantee
- What the cure time is
- What happens if the job turns out different