Greater London · England
External Mastic in Temple Bar
We cover Temple Bar for sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Leaking joints around cladding and façade panels
- Rain getting behind render or cladding at a joint
- Joints where the bead has come unstuck
External mastic in Temple Bar, done properly
Ground-floor and low-level joints are straightforward to reach. Where joints are higher up, tell us about the building when you get in touch and we’ll confirm what access is needed. If you have failed sealant between panels on a façade and weathered mastic that no longer stretches, we can help, on concrete & block, brickwork movement joints and copings & trims alike.
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.
A 12-month guarantee comes as standard, so you’re covered after we’ve gone.
- Place
- Temple Bar (WC2B, WC2E, EC1N)
- Wider area
- Greater London
- Guarantee
- One year on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Common problems we fix in Temple Bar
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.
The problems people normally mention when they call are:
- Sealant that has lost its bond to the brick or render
- Joints pointed up with cement by mistake
- Hard, crazed mastic that has stopped moving
- Failed seals between different materials
Schools such as St Clement Danes CofE Primary School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.
What to look for in a quote
- Who turns up on the day
- What preparation is included
- How the colour is chosen
- How long to leave it before use
Also near Temple Bar
What else we do in Temple Bar
How we quote for external mastic
We do not publish a price list, because jobs vary so much. What we look at:
- Any working-time requirements on site
- Whether old sealant or filler has to be cut out
- Whether there’s mould to deal with
- The number and length of the joints
The cost depends on the amount of work, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before any work starts, so you know where you stand.
Asking for a quote
There’s no need for technical detail. It helps if you can tell us:
- Whether it has been sealed before
- What the problem is, such as mould, gaps, leaks or cracking
- Roughly how big the job is
- The address or postcode of the job
There’s no standard price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To arrange one, phone 0345 464 0079 or send us an email.
Why it’s worth doing now in Temple Bar
A properly done movement joint is an even line in a colour that suits the wall. A hurried job with smeared edges and no backing looks worse and fails sooner, so it pays to do it properly once. In a flat in Temple Bar, failed sealant seldom stays inside your own four walls: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
The cost reflects the work involved, not guesswork. That’s why we ask about the job first and give you a clear quote before we start.
What you get with us
- We never seal over old sealant
- Tidy, careful work
- You choose the colour before work begins
- 180+ five-star Google reviews
Read our cost guide and what customers say.
How the visit works
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 the size of the job. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. Mention any building rules, key holders or managing agents when you book.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- The old mastic and anything lodged in the joint is removed.
- The joint faces are cleaned and primed where the sealant needs it.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Getting ready for the visit
- Clear the area around the work
- Let us know about stairs, lifts or work at height
- Mention any sign-in or site rules at work premises
Ask for a quote
Getting a quote is simple: let us know the job and the location and its rough size. Photos by email help us understand the job, and we will take it from there.
Advice
Walls and rooflines in Temple Bar
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. London terraces and converted houses often share gutters, downpipes and walls, so it’s worth agreeing who is responsible before work starts.
Homes close to Temple Church include some older properties, and an extension built onto an older house moves differently, and the joint between them takes the strain. Temple Bar is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Temple Bar is about 1 mile south of St Pancras, in Greater London. Our applicators cover external mastic for householders, landlords and businesses in Temple Bar and nearby. We cover 764 towns and villages across Greater London, large and small.
We work across WC2B, WC2E and EC1N for external mastic. That includes homes and businesses on Shoe Lane, Drury Lane and New Square. With the A4 and A40 close by, Temple Bar is simple for us to get to for external mastic. We also cover the places around Temple Bar: Temple (1 mile south), Clare Market (1 mile west), Aldwych (1 mile west), Blackfriars (1 mile east) and Covent Garden (1 mile west). Within a short drive, we also cover Kensington (4 miles west), Walthamstow (6 miles north-east), Hampstead (4 miles north-west), Ruislip (13 miles west), Brompton (3 miles south-west) and Stockwell (3 miles south).
Landmarks near Temple Bar
Around Temple Bar, our work takes us to homes and buildings near British Library of Political and Economic Science, Mercers' School and London Nautical School and the streets around them. Other local landmarks include Lincoln's Inn Fields (within half a mile north-west) and Queen's Head Tavern (within half a mile north-east). There’s a railway station in Temple Bar itself: City Thameslink station. Well-known places in the area include Montfichet's Tower (0.5 miles east) and Twinings Museum (within half a mile south-west). Open spaces near Temple Bar include Ludgate Hill and Barnsbury Wood.
When it isn’t the sealant
It helps to know what we cannot do too:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Failed render or damaged cladding panels
- Cracked brickwork or render that needs a builder or plasterer
If you are not sure, just call 0345 464 0079 or email us and we will give you a straight answer before booking.
Where we work in Temple Bar
- Joints between brick and frames
- Façade panels
- Brickwork movement joints
- Concrete & block
- Render & cladding joints
- Copings & trims
Common questions in Temple Bar
I let a flat near City Thameslink station. Can you help?
Yes. We work for letting agents and landlords as well as householders. You can call 0345 464 0079 or email us with the details for a clear quote.
Is Temple Bar in your area for external mastic?
Yes. Our work covers London and the South East, and Temple Bar is part of that. Just call 0345 464 0079 or send us an email with a few details of the job, and we’ll give you a clear quote.
How do you reach high-level joints?
That depends on the building and the joints. Where joints can be reached safely, we’ll do them. Give us some details and we’ll confirm the access.
Where are you based?
Mr Mastic is based in Crawley. Our applicators cover Temple Bar, along with the rest of our area.
Will the old sealant be removed?
Yes, always, and completely. New sealant won’t bond properly to old, so any old material comes out before anything new goes in.
Will you leave a mess?
Not at all. The area is protected while we work and cleaned up afterwards.
Can you seal over the old sealant?
No, it won’t last. It can look neat for a few weeks, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
How long will you be here?
It depends on the size of the job, but most jobs take anything from a few hours to several days, depending on the building. We’ll tell you when we quote.
Should I try it myself first?
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
What the job involves on each surface
Copings and trims
Coping joints that leak let water straight down into the wall. Resealing them is a small job that protects a lot.
Cladding and façade panels
Panels heat up and cool down quickly, so the joints work hard every day. We choose the product to suit.