Kent · England
External & façade joints in Kingston, Kent
External mastic for Kingston, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Sealant that has lost its bond to the brick or render
- Brick movement joints where the sealant has split
- Hard, crazed mastic that has stopped moving
External mastic for homes and businesses in Kingston
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. The colour is chosen to suit the brick or render so the joint doesn’t stand out. We’re often asked to deal with movement joints with cracked, split or missing sealant and hard, crazed mastic that has stopped moving, across copings & trims, joints between brick and frames and façade panels.
Outside joints can only be sealed when they’re dry, so work in Kingston is booked around the forecast. Let us know about access to every wall, plus any garages or outbuildings.
The work is guaranteed for twelve months. If something isn’t right with it in that time, tell us and we’ll put it right.
- Where
- Kingston (CT4)
- Region
- Kent
- Guarantee
- One year on every job
- Quotes
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Why deal with it now?
The longer a joint stays open, the more water the wall takes in. In cold weather, frost can damage wet brick and render, so the damage spreads beyond the joint. In a small place like Kingston, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed. Ask us for a quote and we’ll explain what it covers.
Why Kingston clients choose us
- Homes, businesses and hotels
- 4.9 on Google from 180+ five-star reviews
- A sealant colour to suit the surroundings
- Neat joints and a tidy finish
Take a look at what affects the cost and our reviews.
How the visit works
The work is kept neat and contained to the area we’re working on, so you can get on with your day. The job generally takes anything from a few hours to several days, depending on the building, and we explain the cure time before we leave. In a small place like Kingston, access is generally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by checking each joint, agreeing the ones to redo and how we will reach them.
- The old mastic and anything lodged in the joint is removed.
- The joint faces are cleaned and primed where the sealant needs it.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
How to prepare
- Mention any tricky access
- Clear the area around the work
- Where the joints are inside, avoid wetting them before we arrive
Ask for a quote
Asking for a quote is easy: let us know the job and the location and its rough size. A few pictures by email make the job easier to understand, and we will take it from there.
Advice
DIY versus a professional finish
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
What we cannot put right
To be straight with you, there are a few things sealant won’t fix:
- Walls that need new movement joints cut into them
- Loose or hollow render, which needs re-rendering
- Cracked brickwork or render that needs a builder or plasterer
If you’re not sure, just call 0345 464 0079 or drop us an email and we will give you a straight answer.
Surfaces we seal
- Concrete & block
- Copings & trims
- Render & cladding joints
- Joints between brick and frames
- Brickwork movement joints
- Façade panels
Different surfaces, different methods
Brickwork movement joints
Vertical joints in long brick walls let the brickwork expand without cracking. We reseal them with a low-modulus sealant over backing rod in a colour to suit the brick.
Concrete and blockwork
Wide joints in concrete need the depth controlling carefully. Backing rod sized to the joint sets it.
Nearby places to Kingston
Other services in Kingston
What affects the quote in Kingston
Some jobs are bigger than they look, and some smaller. The main factors:
- Mould in or behind the old joints
- The type of sealant required
- Whether the work is at height
- Working hours on commercial sites
The cost depends on the size of the job, how hard the old material is to remove and access to the work. You will have a clear quote before any work starts, so you know where you stand.
Asking for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- What’s wrong with the joints now
- Any previous sealing or DIY work
- If it’s domestic, commercial or a hotel
- The rough size of the job
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we will explain what’s involved before giving you a price.
FAQs for Kingston
Is Kingston in your area for external mastic?
Yes, Kingston is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or drop us an email with a few details of the job, and we’ll give you a clear quote.
I let a flat near Adisham station. Can you help?
Yes, we work for landlords and agents. Just phone 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear quote.
What sealant do you use?
Products from Arbo and Everbuild, among others, picked for each joint. We explain the product when we quote.
How do I get a quote for external mastic in Kingston?
Size, access and the old material all affect the cost. Call for a quick quote and we will talk you through it.
Can a movement joint be filled with mortar?
No. Cement or mortar cannot stretch and the joint fails. Where a joint has been mortared, it can often be raked out and sealed properly.
How long does external mastic last?
It varies with how exposed the wall is and how much the joint moves. Signs to watch for are cracking, hardening and gaps at the edges, and reseal at that point.
Are you insured?
Yes. Mr Mastic is fully insured, and we’ve been doing sealant work for more than 20 years.
Will the new joint stand out?
The sealant colour is picked to suit the wall. There’s a wide choice of exterior colours.
Walls and rooflines in Kingston
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Goodnestone Park (about 3.8 miles north-east) are a reminder that the area around Kingston has older buildings as well as new. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
Homes close to Church of St Giles include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant. For site and facilities teams at buildings such as Barham Church of England Primary School, larger buildings have long runs of movement joint that eventually need resealing. For landlords with property near Adisham station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Kingston is about 5 miles south-east of Canterbury, in Kent. Jobs in Kingston get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Kingston is one of 922 towns and villages in Kent where we work. You can also see our page for Chelmsford, about 46 miles away.
Postcode districts we cover here for external mastic: CT4. Whether your property is on The Street, Church Lane and Covet Lane or a nearby road, we can help. Nearby, we also carry out external mastic in Out Elmstead (1 mile south-east), Barham (1 mile south-east), Marley (1 mile south-west), Bishopsbourne (1 mile north-west) and Derringstone (1 mile south). Larger places within reach include Ashford (13 miles south-west), Canterbury (5 miles north-west), Margate (15 miles north-east), Dover (9 miles south-east), Folkestone (9 miles south) and Ramsgate (14 miles north-east).
Near you in Kingston
We work in homes and buildings around Black Robin Public House and Jumping Downs. The closest station to Kingston is Adisham station, about 2.7 miles north-east. Nearby you will also find Kent and Canterbury Hospital (4.2 miles north-west).
Landlord and commercial work in Kingston
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements.
We work for landlords and agents as well as householders. Sealant work between tenants is a simple way to keep a property in good order.