Greater London · England
Mugswell External Mastic
External mastic across Mugswell and nearby, with every bit of old sealant taken out first.
- Panel joints letting water in
- Joints where the bead has come unstuck
- Weeds or debris growing in open joints
Aftercare tips
After the cure time, these simple habits help:
- Ask before painting over external sealant
- Deal with leaking gutters that soak the joints below
- Wash walls gently around the sealant
- Tell anyone working on the walls about the movement joints
Don’t let soil, plants or ivy build up against the new joints. Damp material against the sealant shortens its life.
Act while the splits are small. Then it’s a straightforward cut-out and reseal.
External mastic in Mugswell, done properly
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. We work on render & cladding joints, concrete & block and façade panels, and common reasons people get in touch are moss and dirt in joints with no sealant left and brick movement joints where the sealant has split.
In London terraces and converted houses, gutters and walls are often shared with the house next door, so a leaking gutter joint or failed wall joint can affect more than one home. For a flat in Mugswell, check the lease for who looks after the outside.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Place
- Mugswell (CR5)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
What affects the cost of external mastic
There’s no set price list, because no two jobs are the same. What we look at:
- The type of sealant required
- How many areas need sealing
- How easy the joints are to reach
- Working hours on commercial sites
The cost depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before work begins.
What we need to know
Before you ask for a quote, have a think about:
- Whether it’s a home or a business
- If someone has resealed it before
- Pictures of the joints, sent by email
- How we’d reach the joints
Every job is quoted individually. Just ring 0345 464 0079 or drop us an email with the details.
Mugswell: your questions answered
Is parking an issue for external mastic in Mugswell?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. That way the visit can be planned around it.
Can you do external mastic in Mugswell?
Yes. We work across London and the South East, and Mugswell is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job, and we’ll give you a clear price.
When is the sealant fully cured?
Different products cure at different speeds, so please follow the time we give you.
Can you match the colour of my brickwork?
We choose a sealant colour to suit the brick, stone or render so the joint blends in. Exterior sealants come in a good range of colours.
How much does external mastic cost in Mugswell?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote.
Is it OK to seal over old sealant?
No. We remove every bit of old sealant first.
Why do you put foam in the joint first?
The foam is closed-cell backing rod. It keeps the sealant at the right depth and bonded to the sides only.
Is there any odour?
Possibly a little. Any smell clears as the sealant cures, and ventilation helps.
For landlords and businesses
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
Hotels need rooms back in use, so we plan the work room by room. We have worked in hotels as well as homes and businesses.
Towns and villages near Mugswell
Also in Mugswell
How the job changes by surface
Cladding and façade panels
Metal and composite panels move a lot with temperature, so the joints work hard every day. The sealant is chosen with that in mind.
Brickwork movement joints
Vertical joints in long brick walls let the brickwork expand without cracking. We reseal them with a low-modulus sealant over backing rod in a colour to suit the brick.
Why act early in Mugswell
A properly done movement joint is an even line in a colour that suits the wall. A rushed bead with no backing looks untidy and doesn’t last. Damp from a failed joint spreads quietly in older London brickwork and timber, and once it shows in Mugswell, the repair is bigger than a sealant job.
Doing several joints on one visit is generally more efficient than separate visits, so tell us about everything that needs sealing. You will get one clear quote for the whole job.
Why us?
- Tidy, careful work
- Sealant colour chosen to suit
- More than 20 years in sealant work
- Trusted Arbo and Everbuild sealants
Take a look at what affects the cost or what customers say.
Should I try it myself first?
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
Outside joints around Mugswell
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. In terraces and conversions, gutters and walls are often shared with the neighbours, so it’s worth agreeing who is responsible before work starts.
Managing a site like Kingswood Primary School? Then its movement joints, gutters and trims need looking after like any other building’s. For landlords with property near Kingswood station, split movement joints are easy to miss on a rental until damp shows inside. In the older streets around Church of Jesus Christ and the Wisdom of God, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Mugswell is about 3 miles north of Reigate, in Greater London. From the centre of Mugswell to the outskirts, external mastic is available for homes and businesses alike. Our Greater London coverage runs to 764 places, Mugswell among them. There’s also a page for Crawley, roughly 12 miles from Mugswell.
Work in CR5 works the same way as everywhere else we cover. We also cover the places around Mugswell: Gatton (1 mile south-east), Hooley (2 miles north-east), Merstham (2 miles east), South Merstham (2 miles south-east) and Netherne on-the-Hill (3 miles north-east). Further out, we also cover Kensington (15 miles north), Brompton (15 miles north), Stockwell (14 miles north), Orpington (15 miles north-east), Wimbledon (10 miles north) and Kennington (14 miles north).
Near you in Mugswell
Typical jobs here are in homes near Eyhurst Park, Well House Inn and St Bede's School. For rail, the closest station is Kingswood station, about 1.3 miles north-west. Nearby you will also find Surrey Fire Museum (2.4 miles south) and The Belfry (2.9 miles south-east). The countryside around Mugswell includes Reigate Heath and Colley Hill.
How the visit works
At the end, we look at the finished work together and tell you how long to leave it. The work normally 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.
- Old sealant and any debris are cut and raked out.
- Both sides are cleaned back to sound material and primed if needed.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
How to prepare
- Clear items away from the joints we’re working on
- Let us know about stairs, lifts or work at height
- Plan for the work area to be out of bounds to pets and children
Ask for a quote
If you are in Mugswell and need external mastic, ring 0345 464 0079 or send us an email. Tell us what the problem is and where, and you will get a clear quote before any work starts.