East Sussex · England
External Mastic in Dallington
We cover Dallington for sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly and a one-year guarantee.
- Weathered mastic that no longer stretches
- Brick movement joints where the sealant has split
- Sealant pulling away from one side of the joint
Landlord and commercial work in Dallington
Housing providers, facilities teams and property managers book us too. Several sites can be quoted together.
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. We’ve worked in hotels as well as homes and businesses.
External mastic for homes and businesses in Dallington
Getting the depth right is half the job. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, so it bonds to the two sides only and can stretch. We work on joints between brick and frames, concrete & block and façade panels, and the jobs we see most are joints pointed up with cement by mistake and gaps where render, brick and frames meet.
Around Dallington, older buildings can be stone, brick or timber-framed, many with extensions added later. The joints where those materials meet are the weak points.
Our work is backed for twelve months, in Dallington and everywhere else we cover.
- Place
- Dallington (TN21)
- Region
- East Sussex
- Guarantee
- A year, on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Also near Dallington
What else we do in Dallington
Dallington: your questions answered
Do you cover smaller places like Dallington?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you cover Dallington for external mastic?
Yes, Dallington is within the area we cover. Our work covers London and the South East. Just phone 0345 464 0079 or send us an email with a few details of the job, and we will send you a clear quote.
Do you do commercial work?
Yes, regularly. Larger jobs can be planned room by room or area by area.
Can you seal joints between render and window frames?
Yes. Different materials move at different rates, so the joint between them must be flexible. The sealant is matched to both sides.
Why do you put foam in the joint first?
Backing rod goes into deeper joints as a matter of course. It sets the sealant depth and prevents three-sided bonding so the bead can stretch.
Will there be a smell?
That depends on the sealant. Some products have a noticeable smell, others very little, and any smell fades as they cure.
Do you take out the old sealant first?
Yes. Sealing over the old bead is the commonest cause of early failure, so we never do it.
Do I have to be there?
That depends on where the joints are. For work indoors, someone needs to let us in, while outside work can sometimes be arranged differently.
Can I do it myself?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
A DIY attempt doesn’t rule out a professional job. We cut it out and start again.
Do you need external mastic in Dallington?
Poor preparation causes many early failures: joint faces that were dusty or damp, unprimed where they needed it, or still carrying old sealant. The sealant never bonds properly.
People generally contact us after spotting one of these:
- Failed sealant between panels on a façade
- Plants rooting in failed movement joints
- Hard, crazed mastic that has stopped moving
- Joints with sealant missing in places
For site and facilities teams at buildings such as Dallington Church of England Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
What to look for in a quote
- Which colour the sealant will be
- What product goes in the joint
- Whether VAT is included
- How much experience the applicator has
What happens on the day
Most of a good job is in the preparation, so that’s where we spend the time. Every joint is cleaned and dried before new material goes in. In total, it normally takes a few hours for a handful of joints, longer for a whole elevation. For a village or hamlet like Dallington, 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 walking round the building and agreeing the joints and the access.
- 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.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Before we arrive
- Tell us if parking is tricky
- Tell us about any water getting in
- Mention if the joints have been sealed before
Get a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we’ll talk you through the work and give you a clear quote.
Advice
Why deal with it now?
Sealing over the top of old mastic does not hold for long. New sealant doesn’t bond well to old, weathered sealant, so the old joint is cut out fully first. Around Dallington, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please ring 0345 464 0079 or email us.
Why choose Mr Mastic in Dallington
- A 12-month guarantee on all work
- Quality sealants from Arbo and Everbuild
- We’re fully insured
- Sealant colour chosen to suit
See what affects the cost and customer reviews.
Outside joints around Dallington
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Bateman's (about 3.1 miles north) are a reminder that the area around Dallington has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
If you live in an older home near The Parish Church of St Giles, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Dallington is about 7 miles north-east of Hailsham, in East Sussex. For external mastic in and around Dallington, it’s easy to get a quote: please phone 0345 464 0079 or send us an email. We are based in Crawley and cover East Sussex. 289 places in East Sussex are on our list. Our Brighton page covers work nearby.
Here we cover the TN21 postcode area for external mastic. If you’re just outside Dallington, we cover Wood's Corner (1 mile east), Rushlake Green (2 miles west), Punnett's Town (2 miles north-west), Brownbread Street (3 miles south-east) and Burwash Common (3 miles north). We also work in nearby towns such as Eastbourne (12 miles south), Hastings (10 miles south-east), Bexhill-on-Sea (8 miles south-east), Hailsham (7 miles south-west), Crowborough (11 miles north-west) and St Leonards (11 miles south-east).
Local landmarks in Dallington
A little further out are Old Castle (under half a mile west) and Hellingly Hospital (5.6 miles south-west).
What affects the cost of external mastic
We quote each job individually. These are the things that affect it:
- Any working-time requirements on site
- How much old sealant there is and how hard it is to remove
- Access and height
- The number of rooms or windows
Leaving a failed joint generally makes the job bigger, not smaller. If you are unsure, ring 0345 464 0079 or drop us an email for an honest opinion and a quote.
Helping us quote
Photos by email are helpful but not essential. Try to tell us:
- Where the job is, and your postcode
- Pictures of the joints, sent by email
- How many joints, rooms or windows are involved
- Access, such as stairs, a lift or height
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.
Different surfaces, different methods
Joints between dissimilar materials
Each side of the joint may need its own preparation. Both surfaces are cleaned and primed as the product requires.
Cladding and façade panels
Where a cladding system has its own specified sealant, we follow it or an approved alternative. Send us any details you have about the façade.