West Sussex · England
External & façade joints in Adur, West Sussex
Professional external mastic in and around Adur, with old sealant always removed completely.
- Old sealant gone brittle and cracked
- Joints with sealant missing in places
- Sealant pulling away from one side of the joint
About our external mastic in Adur
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. We pick a colour that sits well with the wall so the line blends in. Common call-outs are for failed seals between different materials and panel joints letting water in, across concrete & block, copings & trims and joints between brick and frames.
Around Adur, older buildings can be stone, brick or timber-framed, many with extensions added later. Where one material meets another is where water normally gets in.
You are covered for a year from the day we finish. If anything is not right with it, call 0345 464 0079 or email us.
- Place
- Adur (BN43, BN15)
- Wider area
- West Sussex
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What happens if it’s left?
Mortar or ordinary filler might look like a quick way to close an open joint, but it locks the joint solid. The wall then cracks somewhere else. The correct repair is a flexible sealant with the right backing. Where a wall is exposed, as many are in small places like Adur, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please phone 0345 464 0079 or drop us an email.
Why choose Mr Mastic in Adur
- 12-month guarantee on every job
- Trusted Arbo and Everbuild sealants
- We agree the colour with you first
- Anti-fungal sanitary silicone in wet areas
Landlords, agents and businesses in Adur
We work for landlords and letting agents as well as homeowners. Sealant work between tenants keeps a property looking cared for.
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Different surfaces, different methods
Concrete and blockwork
Blockwork and concrete shrink over time and move with the seasons. We reseal their joints with backing rod and a flexible product.
Brickwork movement joints
People sometimes point up a brick movement joint by mistake. Where one has been mortared, we cut it out and reseal it with sealant where it can be done safely.
Common questions in Adur
Does the coastal weather in Adur affect outside sealant?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. The right product, a clean joint and the right depth all help it cope.
Will you come out to Adur?
Yes. Adur is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
How long before the joint can be used?
Cure times vary by product. We tell you how long to leave it before we go.
How do you reach high-level joints?
That depends on the building and the joints. Where joints can be reached safely, we’ll do them. Give us some details and we’ll confirm the access.
What sealant do you use?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
Can tenants book the work?
Yes, but check with your landlord or agent first. Many landlords are glad to have it sorted.
Can a movement joint be filled with mortar?
No. A mortar-filled joint can’t move, so the movement cracks the wall elsewhere. Use a flexible sealant with backing rod.
Do you use backing rod?
Closed-cell backing rod sets the depth of the sealant and stops it sticking to the back of the joint. That way it bonds to the two sides only and can stretch.
Walls and rooflines in Adur
Adur is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That is hard on movement joints and outside wall joints, especially on the side facing the sea. 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.
For site and facilities teams at buildings such as The Sir Robert Woodard Academy, larger buildings have long runs of movement joint that eventually need resealing. For landlords with property near Shoreham-By-Sea station, split movement joints are easy to miss on a rental until damp shows inside.
Adur is about 1 mile north-west of Shoreham-by-Sea, in West Sussex. Whether you’re in the middle of Adur or further out, we cover external mastic for every kind of property. Across West Sussex, we cover 371 places, and Adur is one of them. Our Brighton page covers work nearby (7 miles or so).
Our applicators cover all of BN43 and BN15 for external mastic. You’ll find streets such as Steyning Road, Coombes Road and Mill Hill, and we cover them all. If you’re just outside Adur, we cover Old Shoreham (1 mile south), Shoreham-by-Sea (1 mile south-east), Castle Town (2 miles north), Kingston by Sea (2 miles east) and Southwick (3 miles south-east). We also work in nearby towns such as Horsham (15 miles north), Worthing (5 miles south-west), Haywards Heath (13 miles north-east), Burgess Hill (10 miles north-east), Littlehampton (11 miles west) and Rustington (10 miles west).
What’s near Adur
Typical jobs here are in homes near Sussex Pad pub. The nearest railway station is Shoreham-By-Sea station, roughly 1.5 miles south-east. A little further out are Steyning Museum (2.9 miles north-west) and Old Castle (4.9 miles south-west). Green spaces nearby include Lancing Ring and Mill Hill.
DIY sealant or a professional job?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
Common problems we fix in Adur
Many joints fail because they were sealed too deep or with nothing behind them. If the sealant sticks to the back as well as the sides, it cannot stretch and rips as the joint opens.
If you can see any of these, it’s time to have the joints looked at:
- Panel joints letting water in
- Moss and dirt in joints with no sealant left
- Brick movement joints where the sealant has split
- Failed seals between different materials
In the older streets around St Nicolas' Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Before you book anyone
- The length of the guarantee
- Whether the sealant suits the joint
- Whether they seal over old material or remove it
- How long to leave it before use
When it isn’t the sealant
We will always be straight with you, so here’s what new sealant won’t do:
- Damp that isn’t coming from the joint
- Loose or hollow render, which needs re-rendering
- Structural movement, which needs a surveyor or engineer
If in doubt, call 0345 464 0079 or email us and we’ll say what we think before you book.
Surfaces we seal
- Copings & trims
- Render & cladding joints
- Brickwork movement joints
- Concrete & block
- Joints between brick and frames
- Façade panels
Nearby places to Adur
What else we do in Adur
How the visit works
Every visit runs the same way: we look at the joints together, protect the area around them, carry out the job and clear up. It normally takes a few hours to a few days, depending on the length of joint and the access. Somewhere like Adur needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
How to prepare
- Let us know about parking restrictions
- Mention any leaks or damp you’ve noticed
- Keep children and pets away from the work area
Get a quote
For external mastic in Adur, phone 0345 464 0079 or email us. Tell us what the problem is and where, and you will get a clear quote before we start.