Greater London · England
External & façade joints in Elephant and Castle, Greater London
Sealing brickwork movement joints, render, cladding and façade joints in Elephant and Castle, with a 12-month guarantee on every job. Ask us for a quote.
- Old sealant gone brittle and cracked
- Water getting into walls through failed joints
- Failed seals between different materials
Elephant and Castle buildings and the weather
In terraces and conversions, gutters and walls are often shared with the neighbours, so check who is responsible for the outside before booking. Historic houses like Benjamin Franklin House (about 1.3 miles north-west) are a reminder that the area around Elephant and Castle 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 Metropolitan Tabernacle, old and new materials meet at the roofline and walls, which is where sealant earns its keep. Elephant and Castle is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Elephant and Castle is about 1 mile south-west of London, in Greater London. Wherever you are in the SE1 postcode area, we can carry out external mastic at your property. We cover 764 towns and villages across Greater London, large and small.
Here we cover the SE1, SE17 and SE11 postcode area for external mastic. If you need external mastic at a property on Dante Road, Oakey Lane and Ash Avenue or a nearby road, we can help. Elephant and Castle sits on or near the A300 and A302, which makes travel easy. If you are just outside Elephant and Castle, we cover Newington Butts (1 mile south), St George's Fields (1 mile north-west), Vauxhall (1 mile west), Lambeth (1 mile west) and Kennington (1 mile south-west). Larger places within reach include City of Westminster (3 miles north-west), Marylebone (3 miles north-west), Kensington (4 miles west), Walthamstow (7 miles north-east), Hoxton (3 miles north) and Hampstead (5 miles north-west).
What’s near Elephant and Castle
Locally, jobs take us to homes and businesses close to The Rockingham Arms, Notre Dame Roman Catholic Girls' School and St Jude's Church of England Primary School. Nearby too are Newington Gardens (within half a mile north-east) and Lambeth Palace Library (0.8 miles west). Elephant and Castle has its own railway station: Elephant & Castle station. A little further out are Newport Street Gallery (0.7 miles west) and Gabriel's Wharf (1 mile north). The countryside around Elephant and Castle includes Bellenden Road Nature Garden and St. James's Park Lake.
External mastic for homes and businesses in Elephant and Castle
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. If you’re dealing with sealant that has lost its bond to the brick or render and failed seals between different materials, we can help.
Modern London flats rely on sealed movement joints and cladding joints. Period houses have different weak points, such as gutter joints, trims and the line where an extension meets the old wall, and both kinds of building are found across London.
Each job carries a 12-month guarantee, large or small.
- Where
- Elephant and Castle (SE1, SE17, SE11)
- Region
- Greater London
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Elephant and Castle: your questions answered
Do you work for landlords with property near Elephant & Castle station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can phone 0345 464 0079 or send us an email with the details for a clear quote.
Can parking be tricky for a visit in Elephant and Castle?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot, so mention what’s available when you book.
When will the joints need doing again?
That varies with the weather the wall faces, how much it moves and the sealant used. Sealant is a maintenance item, so check the joints once a year and renew it when it starts to fail.
Are you an approved applicator?
Yes. We hold ARBOMaster approved applicator status, and we are fully insured.
Do you take out the old sealant first?
Yes. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
Will there be a smell?
Possibly a little. It fades as the sealant cures, and ventilation helps.
What sealant do you use?
The product depends on the job: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. We use products from Arbo and Everbuild.
Can you seal over the old sealant?
No. Fresh sealant does not stick to old sealant, and it traps any mould or water underneath. We remove it all first.
Why it’s worth doing now in Elephant and Castle
Done well, a resealed joint is a neat, straight line that suits the wall. A rushed bead with no backing looks untidy and doesn’t last, so it pays to do it properly once. In London conversions, one flat’s bathroom is often above another flat’s ceiling, and a slow leak from a failed seal can end up in the flat below. Putting it right early is much less trouble.
The cost reflects the work involved, not guesswork. That’s why we ask about the job first and send you a clear quote before work begins.
Why choose Mr Mastic in Elephant and Castle
- More than 20 years in sealant work
- Old sealant always removed completely
- 180+ five-star Google reviews
- Neat joints and a tidy finish
Take a look at our cost guide and our reviews.
Quotes for external mastic in Elephant and Castle
Jobs vary more than people expect. The main factors:
- The product the joint needs
- The number of rooms or windows
- Access and height
- Whether there’s mould to deal with
We do not show prices on the website, because each job is priced on what it involves. Call for a quick quote and we will talk you through it.
What to tell us for a quote
What to tell us when you ask for a quote:
- Photos by email, if that is easy
- Where the job is, and your postcode
- The rough size of the job
- If someone has resealed it before
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. When it suits you, call 0345 464 0079 or drop us an email.
Keeping the joints in good condition
Good habits help new joints last longer. Our tips:
- Look over the joints every year, ideally after winter
- Never let anyone fill a movement joint with mortar
- Deal with leaking gutters that soak the joints below
- Have failed joints looked at early
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They must stay as flexible joints, never rendered or pointed over.
An open movement joint lets rain into the wall every time it pours. That can lead to damp patches, staining and frost damage.
Signs you need external mastic in Elephant and Castle
Sometimes a movement joint was filled with mortar or a rigid filler, 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.
Common reasons people contact us include:
- Rain getting behind render or cladding at a joint
- Joints pointed up with cement by mistake
- Sealant that has lost its bond to the brick or render
- Old sealant gone brittle and cracked
If you look after a building such as London College of Communication, larger buildings have long runs of movement joint that eventually need resealing.
What to look for in a quote
- What happens if the job turns out different
- What preparation is included
- What insurance they hold
- Who does the work, and how experienced they are
What we do, step by step
When we arrive, we look over the joints with you first, so there are no surprises. We protect the surfaces around the joints before we start. Most jobs take a few hours to a few days, depending on the length of joint and the access. In a London area like Elephant and Castle, the main things to plan are parking and access: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- Each joint is checked and the colour of the new sealant agreed.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Before we arrive
- Mention any sign-in or site rules at work premises
- Try not to wet indoor joints just before the visit
- Keep pets and children clear of the area while we work
Get a quote
We don’t publish a price list, because every job is different. Instead, your job gets its own clear quote. To arrange one, phone 0345 464 0079 or email us.
Advice
Places near Elephant and Castle
Other services in Elephant and Castle
Landlord and commercial work in Elephant and Castle
For anyone letting property in or around Elephant and Castle, several properties can be quoted together. Just tell us the addresses and what each one needs.
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.
Surface by surface
Concrete and blockwork
Concrete faces can be dusty and porous, so preparation is key. We prime where the sealant needs it before sealing.
Copings and trims
A failed coping joint lets water into the top of the wall. Resealing them is a small job that protects a lot.