Kent · England
External Mastic in Lynsted
External mastic for Lynsted, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Sealant pulling away from one side of the joint
- Weeds or debris growing in open joints
- Leaking joints around cladding and façade panels
External mastic in Lynsted, done properly
On houses, flats and commercial buildings across Lynsted, we reseal joints in brickwork, render, cladding and façade panels. Every joint gets the same careful preparation: clean, sound faces and a controlled depth. We’re often asked to deal with failed sealant between panels on a façade and joints pointed up with cement by mistake, across joints between brick and frames, concrete & block and render & cladding joints.
Somewhere as small as Lynsted, homes and farm buildings often face open ground, so walls and rooflines take the full force of wind and rain. Gutter joints and wall joints there need a sealant that can flex and stay put.
Your job is guaranteed for a year, as with all our work.
- Place
- Lynsted (ME9)
- Wider area
- Kent
- Cover
- One year on every job
- Quote
- A clear price before work begins
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Why deal with it now?
Pointing a movement joint with mortar might seem a neat fix, but it stops the joint moving. The wall then cracks somewhere else. The correct repair is a flexible sealant with the right backing. Older cottages and farmhouses around Lynsted can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why Lynsted customers choose us
- More than 20 years in sealant work
- A sealant colour to suit the surroundings
- Arbo and Everbuild products
- You choose the colour before work begins
Take a look at our cost guide and our reviews.
Lynsted buildings and the weather
With historic houses such as Belmont House and Gardens (about 3.8 miles south-east) nearby, there’s older building stock in the area around Lynsted as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. 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.
For site and facilities teams at buildings such as Lynsted and Norton Primary School, larger buildings have long runs of movement joint that eventually need resealing. Homes close to Church of St Peter and St Paul include some older properties, and an extension built onto an older house moves differently, and the joint between them takes the strain.
Lynsted is about 3 miles south-east of Sittingbourne, in Kent. If you need external mastic in Lynsted, it’s easy to get a quote: please ring 0345 464 0079 or drop us an email. We cover Kent from our Crawley base. Our area takes in 922 places across Kent. For nearby work, see our Chelmsford page, about 32 miles away.
Here we cover the ME9 postcode area for external mastic. That includes homes and businesses on The Street, St Pauls Court and Ludgate Lane and the roads around them. If you’re just outside Lynsted, we cover Bogle (1 mile north-east), Erriottwood (1 mile south), Bapchild (1 mile west), Newbury (1 mile south-west) and Radfield (1 mile north). We also work in nearby towns such as Maidstone (12 miles west), Ashford (12 miles south), Canterbury (13 miles east), Sittingbourne (3 miles north-west), Whitstable (11 miles east) and Faversham (4 miles east).
Around Lynsted
In Lynsted, that means homes and buildings near Sittingbourne Community College and Black Lion Public House, among other places. For rail, the closest station is Teynham station, about 1.6 miles north-east of the centre. Other landmarks nearby include Newnham Castle (2 miles south) and Sittingbourne Heritage Museum (2.6 miles north-west).
Nearby places to Lynsted
Also in Lynsted
The process
Good joint work is mostly preparation, so that’s where we spend the time. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours for a handful of joints, longer for a whole elevation. For a village or hamlet like Lynsted, the journey is planned in advance: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We start by checking each joint, agreeing the ones to redo and how we’ll reach them.
- Old sealant and any debris are cut and raked out.
- We clean both faces of the joint and prime them where the product calls for it.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Preparing for the visit
- Let us know about stairs, lifts or work at height
- Mention if the joints have been sealed before
- Mention any sign-in or site rules at work premises
Getting a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we will talk you through the work and give you a clear price.
Related advice
Surface by surface
Concrete and blockwork
Wide joints in concrete need the depth controlling carefully. We size the backing rod to the gap.
Copings and trims
Metal and stone copings both move with temperature, so the joints need a sealant that stays flexible.
Aftercare tips
No joint lasts for ever, but care makes a real difference. Our tips:
- Never let anyone fill a movement joint with mortar
- Clear growth from the base of walls and joints
- Wash walls gently around the sealant
- Deal with leaking gutters that soak the joints below
Have a quick look at the joints each spring. Watch for splits, edges coming away or growth in the joint.
Once a joint can’t move, the wall finds another way, often as cracks near the joint. Resealing it early helps prevent that.
What affects the cost of external mastic
For a quick quote, just ask. What matters most is:
- Whether there’s mould to deal with
- The type of sealant required
- How easy the joints are to reach
- The amount of work
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs, along with when we can work on site. Ask us for a quote and we will explain what it covers.
Helping us quote
To help us quote quickly, let us know:
- The rough size of the job
- Photos by email, if that is easy
- Whether it’s a home or a business
- The problem you’ve noticed
There’s no standard price list, as no two jobs are quite the same. Instead, we give you a clear price for your job. To arrange one, call 0345 464 0079 or send us an email.
Lynsted: your questions answered
Is Lynsted in your area for external mastic?
Yes. We work across London and the South East, and Lynsted is part of that. You can ring 0345 464 0079 or email us and tell us what needs doing.
I let a flat near Teynham station. Can you help?
Yes, rental work is part of what we do. You can call 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.
Why is there a gap in my brick wall?
A movement joint is a planned break in the wall that absorbs expansion and shrinkage. It’s sealed with a flexible sealant, not mortar.
Is the work guaranteed?
Yes, for a year. If there’s a problem with our work in that time, tell us and we’ll put it right.
Does someone need to be in?
It depends on the job. Inside work needs someone to give us access, while outside work can sometimes be arranged differently.
How long will you be here?
It depends on the size of the job, but most jobs take a few hours to a few days, depending on the length of joint and the access. We will tell you when we quote.
Can a movement joint be filled with mortar?
No. Rigid materials can’t move with the wall and the joint fails. If it has already been filled, we can generally cut it out and reseal it.
Do you work for hotels and businesses?
Yes. Hotels, offices and other businesses use us and we’re fully insured.
When something else is needed
It helps to know what we cannot do:
- Walls that need new movement joints cut into them
- Cracked brickwork or render that needs a builder or plasterer
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
Not sure which it is? You can ring 0345 464 0079 or send us an email and we will tell you honestly.
Surfaces we seal
- Façade panels
- Brickwork movement joints
- Joints between brick and frames
- Concrete & block
- Copings & trims
- Render & cladding joints
Do you need external mastic in Lynsted?
Many joints fail because they were sealed too deep or with nothing behind them. Sealant bonded to three sides has nowhere to go and rips as the joint opens.
Most people get in touch after spotting something like this:
- Water getting into walls through failed joints
- Moss and dirt in joints with no sealant left
- Failed seals between different materials
- Joints where the bead has come unstuck
Letting a property close to Teynham station? Then split movement joints are easy to miss on a rental until damp shows inside.
Comparing quotes
- Is VAT in the price?
- How long the guarantee is
- How the joint is cleaned and prepared
- What the cure time is