West Sussex · England
External Mastic in Racton
Movement joints in Racton need attention? We remove the old material, prepare the joints and seal them properly, with a one-year guarantee.
- Weathered mastic that no longer stretches
- Water getting into walls through failed joints
- Plants rooting in failed movement joints
About our external mastic in Racton
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible exterior sealant takes up that movement where a rigid filler would soon crack. If you’re dealing with water getting into walls through failed joints and leaking joints around cladding and façade panels, we can help, on joints between brick and frames, brickwork movement joints and render & cladding joints alike.
External sealant needs dry, clean surfaces, so work around Racton is planned for dry weather. Let us know about access to every wall, plus any garages or outbuildings.
Each job carries a 12-month guarantee, whatever its size.
- Where
- Racton (PO18, PO10)
- Wider area
- West Sussex
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Why act early in Racton
An open joint keeps letting water into the wall with every downpour. In cold weather, frost can damage wet brick and render around the joint, so the problem grows beyond the joint itself. Older cottages and farmhouses around Racton can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference, and we will explain the quote if you ask.
Why Racton customers choose us
- A choice of colours where the product allows
- More than 20 years in sealant work
- Anti-fungal sanitary silicone in wet areas
- Rated 4.9 stars on Google
See our cost guide and what customers say.
Honest limits
Honest advice matters more to us than a booking, so here’s what sealant cannot fix:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Walls that need new movement joints cut into them
- Cracking across the wall rather than at a joint
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly.
Joints and surfaces we work on
- Façade panels
- Concrete & block
- Brickwork movement joints
- Joints between brick and frames
- Render & cladding joints
- Copings & trims
What else we do in Racton
How the job changes by surface
Render joints
Cracks along render joints let water in behind the coat. Resealing the joints early keeps water out and protects the render itself.
Brickwork movement joints
Brick walls have vertical movement joints to absorb expansion. They’re resealed over backing rod with a low-modulus sealant.
Your questions about external mastic in Racton
Will you come out to Racton?
Yes. Racton is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Does living near the coast affect external mastic in Racton?
Coastal homes put outside sealant through more weather than inland ones, so preparation and the right sealant matter all the more. It’s worth checking the walls that face the sea first.
How long does external mastic last?
There’s no fixed answer: joints on exposed walls or with a lot of movement age sooner. Check them each year and reseal when they split or harden. Our work comes with a 12-month guarantee.
Will it make a mess?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
I rent my home. Can I book you?
We can work for tenants, landlords or agents. Get your landlord’s agreement first.
Do you hold any approvals?
Yes. We’re an ARBOMaster approved applicator.
What colours does the sealant come in?
The aim is a neat, even joint in a colour that suits the wall. Colour is agreed with you before we begin, matched as closely as the range allows.
Can you reach joints on upper floors?
That depends on how high the joints are and the ground below. Ground-floor joints are simple; for higher ones, send details and we will confirm the access.
What affects the cost of external mastic
The price is agreed before any work begins. It takes into account:
- The amount of work
- How many rooms, windows or areas are involved
- Whether old sealant or filler has to be cut out
- Access and height
Combining jobs into one visit generally makes better use of the time than several visits, so tell us about everything that needs sealing. You’ll get one clear quote for the whole job.
What to tell us for a quote
Photos help, but a description is a good start. Please mention:
- Photos by email, if that is easy
- The address or postcode of the job
- How we’d reach the joints
- The problem you’ve noticed
Asking for a quote is easy: let us know what needs doing and where and its rough size. Photos by email help us understand the job, and we will come back to you with a quote.
How to look after the new joints
Simple care keeps the joints in good condition. We recommend:
- Fix overflowing gutters above sealed joints
- Ask before painting over external sealant
- Point out the joints to other trades
- Look over the joints every year, ideally after winter
Give the sealant the cure time we tell you before anything rubs against it. The surface skins over quickly, but full cure takes longer.
A joint that has stopped moving pushes the movement elsewhere, often as cracks near the joint. Catch it early and you reduce the risk.
What external mastic looks like in Racton
Racton is within about 3 miles of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. Historic houses like Warblington Castle (about 3.9 miles south-west) are a reminder that the area around Racton has older buildings as well as new. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
Rented homes near Southbourne station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies. Schools such as Bourne Community College are buildings too, and larger buildings have long runs of movement joint that eventually need resealing. Homes close to Racton Church include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant.
Racton is about 3 miles north-east of Emsworth, in West Sussex. Every kind of property in Racton can book us for external mastic, old or new, large or small. The work is guaranteed for a year. Racton is one of 371 towns and villages in West Sussex we cover. There’s also a page for Portsmouth, roughly 9 miles from Racton.
We work across the PO18 and PO10 postcode area for external mastic and the streets around it. Close by, we work in Lordington (1 mile north), Walderton (1 mile north-east), Funtington (1 mile east), Hambrook (2 miles south) and West Ashling (2 miles south-east). Further out, we also cover Bognor Regis (11 miles south-east), Chichester (6 miles south-east), Selsey (11 miles south-east), Emsworth (3 miles south-west), Portfield (6 miles south-east) and Yapton (13 miles east).
Landmarks near Racton
In Racton, that means homes and buildings near Stansted Park. Racton’s nearest station is Southbourne station, roughly 2.1 miles south of the centre. Nearby you will also find Emsworth Museum (2.8 miles south-west) and Havant War Memorial Hospital (4.4 miles west). For a walk, there’s Walderton Down and Kingley Vale National Nature Reserve.
What we do, step by step
Most of a good job is in the preparation, so that is 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 Racton, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- First we look over the joints with you, agree which to renew and talk through access.
- Old sealant and any debris are cut and raked out.
- Both sides are cleaned back to sound material and primed if needed.
- 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.
Before we arrive
- Clear the area around the work
- On commercial sites, let us know about site rules
- Tell us if parking is tricky
How to get a quote
Want a quote for external mastic? Please ring 0345 464 0079 or send us an email with a few details. We will explain what we’d do and give you a clear price before work begins.
Read more
DIY sealant or a professional job?
The biggest DIY mistake is sealing over old sealant. 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.
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.