Greater London · England
Sand mastic for sash & case windows in Gillette Corner, Greater London
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for Gillette Corner, backed by a 12-month guarantee. Call for a quick quote.
- Wind and rain getting in round a sash window
- A silicone bead on a sash window that spoils the look
- Cracked mastic round a front door frame
Sand mastic for homes and businesses in Gillette Corner
A silicone bead around a sash window can look out of place and doesn’t suit the building. Sand mastic gives a finish that matches the age of the house, and we can replace one with the other. We work on timber door frames, sash and case windows and period & listed homes, and people most often call us about old sand mastic that has cracked, crumbled or fallen out and cement or filler used on old window joints that has cracked.
Much of London’s older housing was built with timber sash windows, some still in place and some long since replaced. Whatever is in the opening now, the joint between frame and wall is what keeps the weather out.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Location
- Gillette Corner (TW7, TW8)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Gillette Corner questions
Can parking be tricky for a visit in Gillette Corner?
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.
Is Gillette Corner in your area for sand mastic?
Yes. We work across London and the South East, and Gillette Corner is part of that. Just phone 0345 464 0079 or drop us an email with a few details of the job, and we’ll send you a clear quote.
Do I need permission for sand mastic on a listed building?
Check with your local planning authority. They’ll tell you if consent is needed for work to your windows.
I rent my home. Can I book you?
Yes, though it’s best to check with your landlord first. Many landlords are glad to have it sorted.
Can old silicone round a sash window be swapped for sand mastic?
Usually, yes. With the silicone removed and the joint cleaned we point it with sand mastic.
What guarantee comes with the work?
There’s a 12-month guarantee on every job, sand mastic included.
Will you leave a mess?
No. We work neatly, protect the area around the joints and tidy up afterwards.
Are you insured?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
Towns and villages near Gillette Corner
Also in Gillette Corner
What we do, step by step
Good joint work is mostly preparation, and we do not rush it. Every joint is cleaned and dried before new material goes in. In total, it normally takes anything from a few hours to a full day, depending on how many windows. In a London area like Gillette Corner, the main things to plan are parking and access: tell us about permits, visitor bays or off-street space, which floor we are working on and whether there’s a lift.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
Getting ready for the visit
- Mention any leaks or damp you’ve noticed
- Let us know about parking restrictions
- Move anything stored near the joints
Ask for a quote
We do not publish a price list. Instead, we send you a clear quote for your job. To get started, phone 0345 464 0079 or email us.
Advice
Honest limits
To be straight with you, some problems need a different trade:
- Cracked or broken glass
- Decisions on consent for listed homes
- Decayed frames that need repair
If you’re not sure, just call 0345 464 0079 or send us an email and we will give you a straight answer.
Where we work in Gillette Corner
- Stone surrounds
- Tenement windows
- Brick reveals
- Sash and case windows
- Timber door frames
- Period & listed homes
Should I try it myself first?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
Landlords, agents and businesses in Gillette Corner
If you manage several properties in or around Gillette Corner, jobs at different addresses can be quoted together. Send us the addresses and the work at each.
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Frames and glazing around Gillette Corner
In London conversions and blocks, the lease decides who is responsible for the frames, so check that before you book. The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For an older house near a landmark such as St Mary's Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. If you look after a building such as Marlborough Primary School, larger buildings have plenty of frames, and the mastic around each one ages.
Gillette Corner is about 2 miles north-east of Hounslow, in Greater London. For sand mastic in and around Gillette Corner, it’s easy to get a quote: please ring 0345 464 0079 or send us an email. We are based in Crawley and cover Greater London, Gillette Corner included. Our Greater London coverage runs to 764 places, and Gillette Corner is one of them. London is on our list too, around 10 miles away.
We cover every part of the TW7 and TW8 postcode area for sand mastic. Streets in the area include Wood Lane, Syon Lane and Darcy Road, all of which we cover. Neighbouring places we cover for sand mastic include Brentford End (1 mile east), Spring Grove (1 mile west), Isleworth (1 mile south), Osterley (1 mile west) and Brentford (1 mile east). We also work in nearby towns such as 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).
Landmarks near Gillette Corner
Locally, jobs take us to homes and businesses close to The Green School, Coach and Horses pub and Boston Manor Park. Gillette Corner has its own railway station: Syon Lane station. Other landmarks nearby include West Middlesex University Hospital (0.7 miles south) and Musical Museum (1.5 miles east). For a walk, there’s Long Wood and Garden Lake.
What we are called out for in Gillette Corner
Sand mastic slowly weathers. It dries out, cracks and loses its grip from the frame or the masonry.
Any of these means the joints need attention:
- Patchy fillers round a sash window
- Gaps round a timber door in stone or brick
- Tired mastic found when preparing windows for paint
- Crumbling sand mastic round a window
Gillette Corner is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Comparing quotes
- How long to leave it before use
- The length of the guarantee
- What product goes in the joint
- How hidden problems are handled
How the job changes by surface
Stone surrounds
Stone openings are rarely perfectly straight, so the joint varies in width. We shape it by hand to follow the stone.
Tenement and terrace windows
Tenements and terraces often have many sash windows with ageing mastic. We work on single windows or whole elevations.
Leave it or put it right?
Not every filler suits an old window surround. Sand mastic is the like-for-like choice, which can matter on listed and conservation-area homes. Damp from a failed joint spreads quietly in older London brickwork and timber, and once it shows in Gillette Corner, the repair is bigger than a sealant job.
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. You’ll know the price before we begin.
Why Gillette Corner clients choose us
- Domestic, commercial and hotel work
- We’re fully insured
- Old sealant always removed completely
- Quality sealants from Arbo and Everbuild
Take a look at our cost guide or customer reviews.