East Sussex · England
Eastbourne External Mastic
Sealing brickwork movement joints, render, cladding and façade joints in Eastbourne, with a one-year guarantee on every job. Call for a quick quote.
- Failed sealant between panels on a façade
- Moss and dirt in joints with no sealant left
- Weathered mastic that no longer stretches
External mastic in Eastbourne, done properly
We are ARBOMaster approved applicators, and each external joint gets a sealant suited to it. Some surfaces need a primer before sealing, and we don’t skip that step. We work on copings & trims, façade panels and brickwork movement joints, and common reasons people get in touch are sealant that has lost its bond to the brick or render and plants rooting in failed movement joints.
Eastbourne has everything from period brickwork to modern rendered and clad buildings. Modern walls depend on their movement joints; older houses depend on sound gutter and roofline joints.
The work is guaranteed for twelve months. If something isn’t right with it in that time, tell us and we’ll put it right.
- Place
- Eastbourne (BN23, BN22, BN21, BN20)
- Wider area
- East Sussex
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
For landlords and businesses
If you manage several properties in or around Eastbourne, several properties can be quoted together. Just tell us the addresses and what each one needs.
We work for landlords and agents as well as householders. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.
How it works
We keep the work tidy and contained to the area we’re working on, so you can carry on as normal. The job usually takes a few hours for a handful of joints, longer for a whole elevation. Where a business in Eastbourne needs to stay open, out-of-hours working can be arranged, while home visits are arranged within our normal working hours, Monday to Saturday.
- 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.
- The exterior sealant is applied, tooled and checked along its length.
Preparing for the visit
- Mention any tricky access
- Plan for the work area to be out of bounds to pets and children
- Tell us if parking is tricky
How to get a quote
For a quote, ring 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We will give you a clear quote before any work starts.
Related advice
Surface by surface
Joints between dissimilar materials
Brick against render, concrete against metal, stone against timber: every change of material is a joint. A flexible sealant bridges the two so neither cracks the other.
Cladding and façade panels
Panels heat up and cool down quickly, so the joints work hard every day. We choose the product to suit.
What external mastic looks like in Eastbourne
Eastbourne is within about 1 mile 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. London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Letting a property close to Hampden Park station? Then outside joints that have cracked can let damp into a rental, so check them between lets. For an older house near a landmark such as St Andrew, an extension built onto an older house moves differently, and the joint between them takes the strain.
Eastbourne is in East Sussex. If you need external mastic in Eastbourne, it’s easy to get a quote: please ring 0345 464 0079 or drop us an email. We’re based in Crawley and cover East Sussex. 289 places in East Sussex are on our list. For nearby work, see our Brighton page, about 19 miles away.
Every address in BN23, BN22, BN21 and BN20 is within our area for external mastic, from the main roads to the quietest streets. If you need external mastic at a property on Vine Square, Ashford Square and Howard Square or a nearby road, our applicators can take on the job. Being close to the A22 and A259, Eastbourne is simple for us to get to. Neighbouring places we cover for external mastic include Hampden Park (1 mile north-west), Upperton (1 mile south-west), Old Town (1 mile south-west), Ratton Village (2 miles west) and Meads (2 miles south). We also work in nearby towns such as Hastings (13 miles north-east), Bexhill-on-Sea (9 miles north-east), Seaford (8 miles west), Lewes (14 miles north-west), Hailsham (6 miles north) and St Leonards (13 miles east). As one of the bigger places in East Sussex, Eastbourne has homes, rented property and businesses of every kind.
What’s near Eastbourne
Locally, jobs take us to homes and businesses close to Princes Park, Ratton School and The King's Arms Public House, among other places. The closest station to Eastbourne is Hampden Park station, about 0.7 miles north-west. Well-known places in the area include Pevensey Castle (3 miles north-east) and Royal Sussex Regimental Museum (1 mile south-east). The countryside around Eastbourne includes Combe Hill.
Common questions in Eastbourne
Does living near the coast affect external mastic in Eastbourne?
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.
I let a flat near Hampden Park station. Can you help?
Yes, we work for landlords and letting agents. You can ring 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.
What is a movement joint?
A vertical gap in a long brick wall is usually a movement joint. It gives the wall room to move, and it should be sealed with a flexible sealant.
Do you take out the old sealant first?
Yes. We cut out all the old sealant and clean the joint before resealing.
Is the work guaranteed?
Yes. Every job comes with a one-year guarantee.
Do you work in Eastbourne?
Yes. From our base in Crawley, we cover South East England, London and all of Scotland, and that includes Eastbourne.
Can you reach joints on upper floors?
It depends on the height and the site. Low-level joints are straightforward; for higher ones, send details and we will confirm the access.
How long before the joint can be used?
Most sealants are touch-dry well before they’re fully cured. We’ll tell you how long to leave the joint before we leave.
Keeping the joints in good condition
Once the sealant has cured, a few habits help it last:
- Wash walls gently around the sealant
- Leave the joints unpainted unless we have said otherwise
- Clear growth from the base of walls and joints
- Have failed joints looked at early
Do not paint over the new sealant unless we’ve said the product is paintable. Many exterior sealants are not designed to be painted and spoil the finish.
Gaps, plants or missing sealant in a joint are worth getting looked at. Earlier resealing means a smaller job and a better result.
What affects the cost of external mastic
Your quote is based on your job. We take into account:
- The number and length of the joints
- Whether the work is at height
- Which sealant suits the joint
- How many areas need sealing
The cost depends on how much there is to do, how hard the old material is to remove and access to the work. We give a clear quote before any work starts, so you know where you stand.
What to tell us for a quote
To make quoting easier, please include:
- Whether it’s a home or a business
- What’s wrong with the joints now
- Where the job is, and your postcode
- Pictures of the joints, sent by email
Want a quote for external mastic? Please phone 0345 464 0079 or email us with a few details. You will know what we plan to do, and what it will cost, before any work begins.
What sealant work can’t fix
A few problems are outside what sealant work can do:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Walls that need new movement joints cut into them
- Movement that’s more than a sealant joint can take
If you’re not sure, just ring 0345 464 0079 or send us an email and we’ll give you a straight answer.
Surfaces we seal
- Brickwork movement joints
- Façade panels
- Copings & trims
- Concrete & block
- Joints between brick and frames
- Render & cladding joints
What we are called out for in Eastbourne
Some movement joints have been pointed up with mortar, 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.
Any of these means the joints need attention:
- Cracked joints where brick meets render or frames
- Joints pointed up with cement by mistake
- Sealant that has lost its bond to the brick or render
- Old sealant gone brittle and cracked
For site and facilities teams at buildings such as Stafford Junior School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Questions to ask before you book
- Is the old sealant removed completely?
- How hidden problems are handled
- How the joint is cleaned and prepared
- What the quote includes, VAT included or not