Greater London · England
External Mastic in Kenton
Problem with your movement joints in Kenton? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Movement joints filled with mortar instead of sealant
- Cracked joints where brick meets render or frames
- Sealant that has lost its bond to the brick or render
External mastic for homes and businesses in Kenton
We’re ARBOMaster approved applicators, and each external joint gets a sealant suited to it. Some surfaces need a primer before sealing and we use one wherever it does. If you are dealing with hard, crazed mastic that has stopped moving and rigid filler in a joint that should flex, we can help, on joints between brick and frames, copings & trims and façade panels alike.
Newer London blocks are built with movement joints in brick and render, and with cladding joints sealed with mastic. Period houses have different weak points, such as gutter joints, trims and the line where an extension meets the old wall, and both kinds of building are found across London.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Where
- Kenton (HA3, HA7, HA1)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
For landlords and businesses
We work for landlords and agents as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order.
If you manage several properties in or around Kenton, several properties can be quoted together. Send us the addresses and the work at each.
What happens if it’s left?
Done well, a resealed joint is a neat, straight line that suits the wall. A hurried job with smeared edges and no backing looks worse and fails sooner. Damp from a failed joint spreads quietly in older London brickwork and timber, and once it shows in Kenton, the repair is bigger than a sealant job.
Doing several joints on one visit is generally more efficient than separate visits, so it’s worth mentioning everything you’d like done. You will get one clear quote for the whole job.
What you get with us
- Trusted Arbo and Everbuild sealants
- 4.9 on Google from 180+ five-star reviews
- A sealant colour to suit the surroundings
- Fully insured
See what affects the cost and what customers say.
How to look after the new joints
Once the sealant has cured, a few habits help it last:
- Clear growth from the base of walls and joints
- Act on the first splits you see
- Look over the joints every year, ideally after winter
- Leave the joints unpainted unless we’ve said otherwise
Only paint over the joint if we’ve confirmed the sealant can take paint. Paint can crack on a flexible joint and spoil the finish.
Once a joint can’t move, the wall finds another way, often as cracks near the joint. Catch it early and you reduce the risk.
Can I do it myself?
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
Different surfaces, different methods
Concrete and blockwork
The face of concrete or block is often dusty, so cleaning and priming matter. We prime where the sealant needs it before the bead.
Brickwork movement joints
Brick moves with heat and moisture, and grows a little over time. That movement goes into the joint, so its sealant has to stay flexible.
Kenton buildings and the weather
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. In terraces and conversions, gutters and walls are often shared with the neighbours, so check who is responsible for the outside before booking.
If you live in an older home near Church of St Mary, an extension built onto an older house moves differently, and the joint between them takes the strain. For landlords with property near Kenton station, split movement joints are easy to miss on a rental until damp shows inside. Kenton is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Kenton is about 2 miles south of Stanmore, in Greater London. Homes, rented property, offices and hotels in Kenton is covered for external mastic, old or new, large or small. The work is guaranteed for a year. 764 places in Greater London are on our list, large and small. London is on our list too, about 11 miles from Kenton.
Postcode districts we cover here for external mastic: HA3, HA7 and HA1. Whether your property is on Retreat Close, Kenton Road and Woodgrange Avenue or a nearby road, we can help. Being close to the A4006, Kenton is easy for our applicators to reach for external mastic. Close by, we work in South Kenton (1 mile south), Northwick Park (1 mile south-west), Greenhill (1 mile west), Wealdstone (1 mile north-west) and Harrow on the Hill (2 miles south-west). Further out, we also cover London (11 miles south-east), City of Westminster (8 miles south-east), Marylebone (8 miles south-east), Kensington (7 miles south-east), St Pancras (9 miles south-east) and Shoreditch (11 miles south-east).
What’s near Kenton
Around Kenton, our work takes us to homes and buildings near Uxendon Manor Primary School, The New Moon pub and Preston Park, among other places. The closest station to Kenton is Kenton station, roughly 0.5 miles south-west of the centre. Other landmarks nearby include St. Anns (1.3 miles west) and Hilfield Castle (4.9 miles north). For a walk, there’s Masons Field and Northala Fields.
FAQs for Kenton
Is parking an issue for external mastic in Kenton?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. The visit is then planned around what’s available.
Can you do external mastic in Kenton?
Yes, Kenton is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or send us an email and let us know what needs doing.
Do you do commercial work?
Yes. We work in offices, washrooms, hotels and other commercial premises. We can talk about working times when we quote.
Will you leave a mess?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
Can I add another job to the visit?
Yes. Just list everything you need.
Do you have insurance?
Yes, we’re fully insured for domestic and commercial work.
What information do you need?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
Which products do you use?
Each joint gets the product that suits it. Movement, water and weather all affect the choice, and we’ll explain our choice.
What affects the quote in Kenton
The price is agreed before any work begins. It’s based on:
- The size of the job
- Mould in or behind the old joints
- How many rooms, windows or areas are involved
- The old material and how stubborn it is
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote.
What we need to know
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- What’s wrong with the joints now
- The type of property
- Where the job is, and your postcode
- Roughly how big the job is
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and add pictures by email if you can.
Places near Kenton
Other services in Kenton
What we do, step by step
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 anything from a few hours to several days, depending on the building. In a London area like Kenton, the main things to plan are parking and access: let us know about parking, the floor we will be working on and any lift or shared entrance.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Before we arrive
- Let us know if you’ve seen damp or leaks
- Clear the area around the work
- Tell us if parking is tricky
How to get a quote
Want a quote for external mastic? Please phone 0345 464 0079 or email us and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.