Greater London · England
Royal Docks External Mastic
Professional external mastic in and around Royal Docks, with every bit of old sealant taken out first and a 12-month guarantee.
- Movement joints with cracked, split or missing sealant
- Moss and dirt in joints with no sealant left
- Weathered mastic that no longer stretches
FAQs for Royal Docks
Do you work for landlords with property near Custom House station?
Yes, we work for landlords and letting agents. Just ring 0345 464 0079 or email us and tell us about the property, and we’ll give you a clear quote.
Can parking be tricky for a visit in Royal Docks?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. The visit is then planned around what’s available.
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. We use products from Arbo and Everbuild.
Is the work guaranteed?
Yes, for a year. If anything isn’t right with the work within the year, let us know and we’ll sort it.
How do I get a quote for external mastic in Royal Docks?
Every job is different, so each one gets its own quote. For a quick quote, phone 0345 464 0079 or send us an email with a short description of the job.
When is the sealant fully cured?
It depends on the product and the temperature. Before we leave, we will tell you the cure time.
Why is there a gap in my brick wall?
Most straight vertical gaps in brickwork are movement joints. It gives the wall room to move and needs a flexible seal, not mortar.
Do you work at height?
It depends on the building. We work on joints that can be reached safely. Give us some details and we will confirm the access.
About our external mastic in Royal Docks
External mastic is a job where short cuts show quickly. New sealant over old, joints packed with mortar and beads with no backing rarely last long. We take the old material out and do it properly. If you’re dealing with rain getting behind render or cladding at a joint and failed sealant between panels on a façade, we can help, on copings & trims, brickwork movement joints and façade panels alike.
Outside work in London starts with access: side passages, upper floors and where to park. For a home in Royal Docks, tell us how high the joints are and how to reach the back of the building.
The work is guaranteed for twelve months. If something is not right with it in that time, tell us and we will put it right.
- Where
- Royal Docks (E16, E6)
- Wider area
- Greater London
- Cover
- One year on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
What we do, step by step
Before we leave, we go over the finished joints with you. The visit itself usually takes a few hours to a few days, depending on the length of joint and the access, depending on how much there is to do. In Royal Docks, flats, stairs and shared entrances are part of the routine. Mention any building rules, key holders or managing agents when you book.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- Primer is applied wherever the sealant needs it.
- We gun in low-modulus sealant and tool it neatly.
How to prepare
- Let us know about stairs, lifts or work at height
- Clear the area around the work
- Tell us about any previous sealing or DIY attempts
How to get a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. Whenever you’re ready, phone 0345 464 0079 or drop us an email.
Related advice
What sealant work can’t fix
To be straight with you, there are a few things sealant will not fix:
- Adding movement joints to masonry that has none
- Rising or penetrating damp from elsewhere in the wall
- Cracked brickwork or render that needs a builder or plasterer
If you are not sure, just phone 0345 464 0079 or send us an email and we’ll give you a straight answer.
Joints and surfaces we work on
- Concrete & block
- Façade panels
- Render & cladding joints
- Copings & trims
- Joints between brick and frames
- Brickwork movement joints
External mastic in Royal Docks: local notes
Historic houses like Queen's House (about 2.7 miles south-west) are a reminder that the area around Royal Docks has older buildings as well as new. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material. In terraces and conversions, gutters and walls are often shared with the neighbours, so check who is responsible for the outside before booking.
Royal Docks is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book. Homes close to Church of the Ascension include some older properties, and an extension built onto an older house moves differently, and the joint between them takes the strain.
Royal Docks is about 1 mile south-east of Canning Town, in Greater London. Every kind of property in Royal Docks can book us for external mastic. Every job comes with our 12-month guarantee. 764 places in Greater London are on our list, large and small. You can also see our page for London, roughly 6 miles from Royal Docks.
Postcode districts we cover here for external mastic: E16 and E6. Streets in the area include Drew Road, Leyes Road and Camel Road, all of which we cover. Main roads around Royal Docks include the A1020. We also cover the places around Royal Docks: Custom House (1 mile west), Silvertown (1 mile south-west), North Woolwich (1 mile south-east), West Silvertown (1 mile west) and Canning Town (1 mile north-west). Larger places within reach include London (6 miles west), City of Westminster (8 miles west), Marylebone (8 miles west), Kensington (11 miles west), St Pancras (7 miles west) and Shoreditch (5 miles west).
What’s near Royal Docks
Typical jobs here are in homes near Royal Docks Academy, Beckton District Park and The Royal Docks Community School. The nearest railway station is Custom House station, about 0.7 miles west of the centre. Well-known places in the area include Albert Dock Seamen's Hospital (less than half a mile north-west) and North Woolwich Old Station Museum (1 mile south-east). Not far away are Gilbert's Pit.
Signs you need external mastic in Royal Docks
Sunlight, wet weather and frost wear exterior sealant down. Over the years it hardens, cracks on the surface and loses its give, so the next time the wall moves, it splits or pulls away.
The most common problems we see are:
- Joints with sealant missing in places
- Leaking joints around cladding and façade panels
- Movement joints filled with mortar instead of sealant
- Sealant that has lost its bond to the brick or render
For landlords with property near Custom House station, split movement joints are easy to miss on a rental until damp shows inside.
Comparing quotes
- Is VAT in the price?
- Whether all the old sealant comes out first
- What happens if the job turns out different
- Who turns up on the day
How to look after the new joints
So the new joints stay in good condition:
- Fix overflowing gutters above sealed joints
- Look over the joints every year, ideally after winter
- Act on the first splits you see
- Point out the joints to other trades
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.
Should I try it myself first?
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions.
Also near Royal Docks
More services for Royal Docks
Landlords, agents and businesses in Royal Docks
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.
If you manage several properties in or around Royal Docks, several properties can go on one quote. Send us the addresses and the work at each.
Why act early in Royal Docks
Mortar or ordinary filler might look like a quick way to close an open joint, but it stops the joint moving. The movement then cracks the brickwork or render nearby. A flexible sealant over backing rod is what the joint needs. In a flat in Royal Docks, failed sealant seldom stays inside your own four walls: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote.
Why us?
- Trusted Arbo and Everbuild sealants
- We leave the area clean and tidy
- Every job guaranteed for a year
- Full insurance on every job
Read our cost guide and our reviews.