Kent · England
The Brents External Mastic
We cover The Brents for sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Weeds or debris growing in open joints
- Leaking joints around cladding and façade panels
- Failed seals between different materials
Should I try it myself first?
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
About our external mastic in The Brents
For buildings in The Brents, we reseal external joints of all kinds, from brick movement joints to cladding panels. The preparation is the same whatever the wall: clean, sound faces and a controlled depth. We work on brickwork movement joints, façade panels and render & cladding joints, and the jobs we see most are water getting into walls through failed joints and plants rooting in failed movement joints.
Outbuildings, garages and conservatories around homes in places like The Brents add more joints to look after. Gutter ends, garage door frames and the joints where an extension meets the house are typical spots for leaks.
Big or small, it’s backed by our 12-month guarantee.
- Where
- The Brents (ME13)
- Region
- Kent
- Cover
- 12 months on all our work
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What else we do in The Brents
What affects the cost of external mastic
Every job gets its own quote. These are the things that affect it:
- Working hours on commercial sites
- Access and height
- Mould in or behind the old joints
- How much there is to do
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please ring 0345 464 0079 or send us an email.
What to tell us for a quote
Before you ask for a quote, have a think about:
- What’s wrong with the joints now
- The rough size of the job
- The address or postcode of the job
- Pictures of the joints, sent by email
For a quote, phone 0345 464 0079 or send us an email with the location and a short description of the problem. We’ll give you a clear price before any work starts.
Do you need external mastic in The Brents?
Sometimes a movement joint was filled with mortar or a rigid filler, often by someone who didn’t know what it was for. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
The most common problems we see are:
- Leaking joints around cladding and façade panels
- Gaps where render, brick and frames meet
- Sealant pulling away from one side of the joint
- Weeds or debris growing in open joints
If you look after a building such as Davington Primary School, its movement joints, gutters and trims need looking after like any other building’s.
Questions to ask before booking
- How hidden problems are handled
- The length of the guarantee
- How the joint is cleaned and prepared
- How the colour is chosen
Keeping the joints in good condition
Good habits help new joints last longer. A few tips:
- Fix overflowing gutters above sealed joints
- Keep high-pressure jets off the joints
- Keep movement joints as flexible joints, not mortar
- Act on the first splits you see
Avoid pressure-washing straight into the joints. High-pressure water can lift the edges and let water in behind.
An open movement joint lets rain into the wall every time it pours. That can lead to damp patches, staining and frost damage.
What we can’t put right
A few problems are outside what sealant work can do:
- Failed render or damaged cladding panels
- Subsidence or other structural problems
- Cracked brickwork or render that needs a builder or plasterer
If in doubt, phone 0345 464 0079 or send us an email and we will say what we think.
Surfaces we seal
- Brickwork movement joints
- Façade panels
- Render & cladding joints
- Joints between brick and frames
- Copings & trims
- Concrete & block
The Brents: your questions answered
Will you come out to The Brents?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Does living near the coast affect external mastic in The Brents?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Is it OK to seal over old sealant?
No. New silicone will not bond to old silicone, and it traps any mould or water underneath. We remove it all first.
Do you remove the old sealant?
Always. Sealing over old sealant is the main reason resealing fails early, so we never do it.
I rent my home. Can I book you?
Yes, but check with your landlord or agent first. Landlords are often happy for the work to be arranged.
Should I point up the gap in my brickwork?
No, not if it’s a movement joint. Filling it with mortar defeats its purpose and can lead to cracking. We will reseal it with a flexible sealant.
Do you use backing rod?
Backing rod goes into deeper joints as a matter of course. It controls the depth and stops the sealant bonding to the back, so the joint can move.
Where is Mr Mastic based?
We are a Crawley-based firm, with over 20 years’ experience. Our area covers South East England, London and Scotland.
External mastic in The Brents: local notes
The Brents is within about 3 miles of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Rented homes near Faversham station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets. If you live in an older home near Faversham Parish Church, an extension built onto an older house moves differently, and the joint between them takes the strain.
The Brents is about 1 mile north-east of Faversham, in Kent. Wherever you are in the ME13 postcode area, we cover external mastic for homes and businesses. Our Kent coverage runs to 922 places, The Brents among them. You can also see our page for Chelmsford, about 34 miles away.
Our applicators cover all of ME13 for external mastic. Whether your property is on Ham Road, Back Lane and Quay Lane or a nearby road, we can help. Neighbouring places we cover for external mastic include Davington (1 mile west), Faversham (1 mile south-west), Preston (1 mile south), Oare (1 mile north-west) and Ospringe (1 mile south-west). We also work in nearby towns such as Ashford (12 miles south), Canterbury (9 miles east), Sittingbourne (7 miles west), Whitstable (6 miles east), Herne Bay (11 miles east) and Minster (8 miles north-west).
What’s near The Brents
We work in homes and buildings around The Brents Tavern, Oare Meadow and Queen Elizabeth's Grammar School. The nearest railway station is Faversham station, roughly 0.6 miles south. A little further out are Newnham Castle (4.6 miles south-west).
Why it’s worth doing now in The Brents
Mortar or ordinary filler might look like a quick way to close an open joint, but it stops the joint moving. The movement then cracks the brickwork or render nearby. A flexible sealant over backing rod is what the joint needs. In an older home around The Brents, damp from a failed joint can get into timber and plaster, and that’s a much bigger job than renewing the sealant.
Doing several joints on one visit usually makes better use of the time than several visits. You will get one clear quote for the whole job.
Why The Brents clients choose us
- Any old sealant cut out fully, not covered over
- 180+ five-star Google reviews
- 12-month guarantee on every job
- 20+ years of sealant experience
Take a look at our cost guide or our reviews.
What happens on the day
Every visit runs the same way: we look at the joints together, mask and protect the surrounding surfaces, carry out the job and tidy away. Most jobs take a few hours to a few days, depending on the length of joint and the access. In a smaller place like The Brents, parking is seldom the issue; lanes, gates and long drives are worth mentioning. For outside work, side access and the height of the joints help us plan.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- Clear items away from the joints we are working on
- Let us know about parking restrictions
- Tell us about any water getting in
Get a quote
Asking for a quote is easy: let us know the job and the location, and roughly how big it is. Photos by email help us understand the job, and we’ll come back to you with a quote.