Southampton · England
External Mastic in Sholing
Professional external mastic in and around Sholing, with old sealant always removed completely and a 12-month guarantee.
- Gaps where render, brick and frames meet
- Sealant pulling away from one side of the joint
- Movement joints filled with mortar instead of sealant
How we handle external mastic in Sholing
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Porous or awkward surfaces are primed where the sealant needs it, and we do not skip that step. We are often asked to deal with gaps where render, brick and frames meet and hard, crazed mastic that has stopped moving, on copings & trims, concrete & block and brickwork movement joints.
Outbuildings, garages and conservatories around homes in places like Sholing add more joints to look after. Leaks usually start at a gutter end, a garage door frame or where an extension meets the house.
All our work is covered by a one-year guarantee.
- Place
- Sholing (SO19)
- Region
- Southampton
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
What happens if it’s left?
A failed movement joint lets water into the wall. Resealing early keeps the job to the joint itself, rather than the wall around it. In a smaller place like Sholing, wherever a wall is exposed, a failed outside joint is a real source of damp. Inside, a split seal lets water into floors and panels just as it would anywhere.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you’re not sure whether it needs doing, call 0345 464 0079 or send us an email for an honest opinion and a quote.
Why Sholing customers choose us
- White, clear, grey or coloured to suit, where the product allows
- Full insurance on every job
- Approved under the ARBOMaster scheme
- Every job guaranteed for a year
Take a look at how sealant jobs are priced and what customers say.
Places near Sholing
Other services in Sholing
Honest limits
We’ll always be straight with you, so here’s what new sealant won’t do:
- Loose or hollow render, which needs re-rendering
- Walls that need new movement joints cut into them
- Movement that’s more than a sealant joint can take
Not sure which it is? You can ring 0345 464 0079 or email us and we will tell you honestly before booking.
What we seal
- Joints between brick and frames
- Render & cladding joints
- Copings & trims
- Façade panels
- Concrete & block
- Brickwork movement joints
For landlords and businesses
Letting agents often deal with us directly. Tell us the address, the job and how access works and we’ll quote.
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
How the visit works
Once we’re on site, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. After that, the work takes a few hours for a handful of joints, longer for a whole elevation. A visit to Sholing is planned like any other: the time, the access and where to park are agreed in advance. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- We look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
Getting ready for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Try not to wet indoor joints just before the visit
- Keep children and pets away from the work area
How to get a quote
Want a quote for external mastic? Please phone 0345 464 0079 or email us with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
Related advice
Walls and rooflines in Sholing
Sholing is close to 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, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Rented homes near Sholing station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies. If you look after a building such as St Monica Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Sholing is about 2 miles south-east of Southampton, in Southampton. If you need external mastic in Sholing, please ring 0345 464 0079 or drop us an email for a quick quote. We’re based in Crawley and cover Southampton, Sholing included. Our Southampton coverage runs to 40 places, Sholing among them.
We work across SO19 for external mastic. Local streets include Bay Road, Ashby Road and Loane Road. Sholing sits on or near the A3025, which makes travel easy. Close by, we work in Itchen (1 mile west), Thornhill (1 mile north-east), Bitterne (1 mile north), Peartree Green (1 mile west) and Northam (1 mile north-west). Further out, we also cover Shirley (4 miles north-west), Regents Park (4 miles west), Maybush (5 miles north-west), Coxford (4 miles north-west), Freemantle (3 miles west) and Lordswood (4 miles north-west). As one of the bigger places in Southampton, Sholing has homes, rented property and businesses of every kind.
Near you in Sholing
In Sholing, that means homes and buildings near The Red Lion pub, Woolston School and Westwood Woodland Park. Sholing’s nearest station is Sholing station, roughly 0.5 miles south-west of the centre. Well-known places in the area include Netley Castle (1.6 miles south) and Marlands Shopping Centre (2.3 miles west). Open spaces near Sholing include Netley Common.
Do you need external mastic in Sholing?
Using the wrong sealant is another common reason. A high-modulus or general-purpose sealant can be too rigid for a busy joint, and it tears off the sides.
Common reasons people contact us include:
- Joints pointed up with cement by mistake
- Damp patches traced to an open external joint
- Movement joints with cracked, split or missing sealant
- Old sealant gone brittle and cracked
Homes close to Church of St Mary include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant.
Comparing quotes
- Whether they’re fully insured
- Is the old sealant removed completely?
- Which sealant they’ll use, and why
- Which colour the sealant will be
Questions from Sholing
I let a flat near Sholing station. Can you help?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or email us and tell us about the property, and we will give you a clear price.
Does living near the coast affect external mastic in Sholing?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Do you work for hotels and businesses?
Yes. Commercial and hotel work is a large part of what we do, as well as homes. Working times can be discussed when we quote.
Do you come to Sholing?
Yes. We cover Sholing, as part of our work across South East England, London and Scotland. To book, phone 0345 464 0079 or send us an email.
How long does external mastic take?
A typical job takes a few hours for a handful of joints, longer for a whole elevation, including preparation and clearing up. We’ll confirm how long when we quote.
Is there a guarantee?
Yes, for a year. If there’s a problem with our work in that time, tell us and we will put it right.
What colours does the sealant come in?
The aim is a neat, even joint in a colour that suits the wall. We will talk through colour options before we start from the range available.
What does external mastic cost?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote.
How to look after the new joints
After the cure time, these simple habits help:
- Avoid pressure-washing directly into sealant joints
- Have failed joints looked at early
- Walk round the building once a year and look at the joints
- Ask before painting over external sealant
Keep pressure washers away from the sealant. High-pressure water can lift the edges and let water in behind.
If you can see gaps, plants or bare sections in a joint, have it checked. Early work is quicker and leaves a better finish.
DIY sealant or a professional job?
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so just mention it when you contact us.