Greater London · England
Gillette Corner External Mastic
Our applicators work in Gillette Corner on sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly.
- Sealant that has lost its bond to the brick or render
- Leaking joints around cladding and façade panels
- Weeds or debris growing in open joints
Surface by surface
Concrete and blockwork
Concrete and block walls shrink as they dry and move with temperature. We reseal their joints with backing rod and a flexible product.
Joints between dissimilar materials
Where a frame or panel meets masonry, water often finds a way in. The old joint is removed and a sealant that bonds to both sides goes in.
External mastic in Gillette Corner
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. The colour is chosen to suit the brick or render so the joint doesn’t stand out. Typical jobs include joints where the bead has come unstuck and movement joints filled with mortar instead of sealant, across copings & trims, concrete & block and brickwork movement joints.
London’s terraces and conversions often share walls, gutters and downpipes with their neighbours, so a leaking gutter joint or failed wall joint can affect more than one home. In a converted house in Gillette Corner, it’s worth checking who is responsible for the outside before booking.
We stand behind the work with a one-year guarantee, so you’re not left on your own once the job is done.
- Place
- Gillette Corner (TW7, TW8)
- Region
- Greater London
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
The process
We bring everything the job needs with us, so you do not need to buy or prepare anything. Once we have agreed what’s being done, the area is protected and the work begins. Most jobs take a few hours to a few days, depending on the length of joint and the access. For a job in Gillette Corner, parking and access are the things to plan: 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.
- Failed sealant is removed back to clean, sound faces.
- 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
- Move anything stored near the joints
- Let us know about stairs, lifts or work at height
- Let us know about parking restrictions
Getting a quote
We quote each job on its own, so the first step is telling us about yours. Simply phone 0345 464 0079 or send us an email and describe the job, and photos are welcome.
Related advice
Places near Gillette Corner
Also in Gillette Corner
Should I try it myself first?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so tell us about it when you ask for a quote.
Why act early in Gillette Corner
Done well, a resealed joint is a neat, straight line 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. Converted houses in London often have a bathroom above someone else’s living room, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Dealing with it early is far simpler.
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, phone 0345 464 0079 or send us an email for an honest opinion and a quote.
Why book with us
- Any old sealant cut out fully, not covered over
- We leave the area clean and tidy
- Anti-fungal sanitary silicone in wet areas
- Arbo and Everbuild products
Read what affects the cost or customer reviews.
How to look after the new joints
Aftercare is simple, and it makes a real difference:
- Point out the joints to other trades
- Wash walls gently around the sealant
- Look over the joints every year, ideally after winter
- Keep movement joints as flexible joints, not mortar
Don’t let soil, plants or ivy build up against the new joints. Damp material against the sealant shortens its life.
Gaps, plants or missing sealant in a joint are worth getting looked at. Early work is quicker and leaves a better finish.
What we’re called out for in Gillette Corner
Using the wrong sealant is another common reason. A stiff, general-purpose sealant cannot cope with a joint that moves a lot, so it pulls away from the edges.
Keep an eye out for these signs:
- Sealant that has lost its bond to the brick or render
- Joints with sealant missing in places
- Failed sealant between panels on a façade
- Joints pointed up with cement by mistake
If you let a flat or house near Syon Lane station, split movement joints are easy to miss on a rental until damp shows inside.
Before you book anyone
- How hidden problems are handled
- When the joint can take water or movement
- Whether the sealant suits the joint
- Which colour the sealant will be
Gillette Corner buildings and the weather
Historic houses like Boston Manor (about 0.7 miles north-east) are a reminder that the area around Gillette Corner 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. London terraces and converted houses often share gutters, downpipes and walls, so check who is responsible for the outside before booking.
As a London address, Gillette Corner can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. If you live in an older home near St Mary's Church, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Gillette Corner is about 2 miles north-east of Hounslow, in Greater London. Every kind of property in Gillette Corner is covered for external mastic, old or new, large or small. Every job comes with our 12-month guarantee. Gillette Corner is one of 764 towns and villages in Greater London we cover for external mastic. There’s also a page for London, roughly 10 miles from Gillette Corner.
Every address in TW7 and TW8 is within our area for external mastic. Local streets include Wood Lane, Syon Lane and Darcy Road. We also cover Brentford End (1 mile east), Spring Grove (1 mile west), Isleworth (1 mile south), Osterley (1 mile west) and Brentford (1 mile east). Further out, we also cover London (10 miles east), City of Westminster (8 miles east), Marylebone (8 miles east), Kensington (6 miles east), St Pancras (9 miles east) and Shoreditch (11 miles east).
Local landmarks in Gillette Corner
Locally, jobs take us to homes and businesses close to The Green School, Coach and Horses pub and Boston Manor Park, among other places. There’s a railway station in Gillette Corner itself: Syon Lane station. Other landmarks nearby include West Middlesex University Hospital (0.7 miles south) and Musical Museum (1.5 miles east). Not far away are Long Wood and Garden Lake.
How we quote for external mastic
The price is agreed before any work begins. It’s based on:
- The size of the job
- Working hours on commercial sites
- The number of rooms or windows
- The type of sealant required
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please call 0345 464 0079 or email us.
What to tell us for a quote
You don’t need to know the technical terms. It helps if you can tell us:
- Whether it’s a home or a business
- Photos by email, if that’s easy
- Roughly how big the job is
- Any previous sealing or DIY work
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. Whenever you are ready, call 0345 464 0079 or drop us an email.
Your questions about external mastic in Gillette Corner
I let a flat near Syon Lane station. Can you help?
Yes, landlords and agents are among the people we work for. You can ring 0345 464 0079 or drop us an email with the details for a clear quote.
Is Gillette Corner in your area for external mastic?
Yes, Gillette Corner is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or email us with a few details of the job, and we’ll send you a clear quote.
Will it make a mess?
No. We protect the surfaces around the joints, and we tidy up before we go.
What does external mastic cost?
It depends on the job, so we quote each one individually. For a quick quote, call 0345 464 0079 or send us an email with a short description of the job.
What should I tell you?
The location, the problem and the rough size of the job. Photos by email help too.
Is it OK to seal over old sealant?
No, it won’t last. It may look fine at first, but the new layer lifts away from the old one. The old sealant has to come out completely.
Is it worth trying it myself?
Some simple jobs can be done by a careful DIYer. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Will the old sealant be removed?
Yes. We cut out all the old sealant and clean the joint before applying anything new.