Greater London · England
Sand Mastic in Shadwell
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for Shadwell, backed by a one-year guarantee. Call for a quick quote.
- Old sand mastic that has cracked, crumbled or fallen out
- Mastic round period door frames that has failed
- Gaps between timber frames and stone or brick
Sand mastic in Shadwell, done properly
Traditional burnt sand mastic blends with stone and brick surrounds. It suits period and listed homes where a modern sealant bead would stand out. We work on sash and case windows, brick reveals and period & listed homes, and people most often call us about cement or filler used on old window joints that has cracked and wind and rain getting in round a sash window.
Much of London’s older housing was built with timber sash windows, some still in place and some long since replaced. Either way, the mastic between frame and brickwork is what stops draughts and rain getting in, in Shadwell as anywhere.
Each job carries a 12-month guarantee, large or small.
- Location
- Shadwell (SE16, E1, E1W)
- Wider area
- Greater London
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Aftercare tips
How long the joints last depends on use and care. Here’s what we suggest:
- Keep sills and gutters clear so water drains away
- Sort the mastic before the decorators arrive
- Get any rot dealt with first
- Look over the window mastic once a year
Look at the mastic when you look over the windows. Catching cracks early keeps repairs small.
Fine cracks show the mastic is starting to fail. Renewing it then is simpler than waiting until it falls out.
Windows and doors in Shadwell
Historic houses like Mansion House (about 1.9 miles west) are a reminder that the area around Shadwell has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. 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.
Schools such as Peter Hills with St Mary's and St Paul's CofE Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s. For landlords with property near Wapping station, any sash windows need sound mastic to keep draughts and rain out. In the older streets around St Paul's Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Shadwell is about 1 mile south-east of Whitechapel, in Greater London. Our applicators cover sand mastic for householders, landlords and businesses in Shadwell and nearby, as part of our work across Greater London. Our area takes in 764 places across Greater London, large and small.
Jobs for sand mastic in SE16, E1 and E1W works the same way as everywhere else we cover. Whether your property is on Swan Road, Thame Road and Brunel Road or anywhere close by, our applicators can take on the job. Shadwell sits on or near the A101 and A126, which makes travel easy. Nearby, we also carry out sand mastic in Ratcliff (1 mile north), East End of London (1 mile north-west), Wapping (1 mile west), St George in the East (1 mile west) and Limehouse (1 mile north-east). We also work in nearby towns such as City of Westminster (5 miles west), Marylebone (4 miles west), Kensington (7 miles west), St Pancras (3 miles north-west), Walthamstow (6 miles north) and Hampstead (7 miles north-west).
Around Shadwell
Locally, jobs take us to homes and businesses close to Bacon's College, Bishopsgate Institute Special Collections and Archives and Russia Dock Woodland and the streets around them. You’ll also find Prospect of Whitby pub (within half a mile west) and St Mellitus College (0.6 miles west). Shadwell has its own railway station: Wapping station. Nearby you’ll also find St Olave's Hospital (0.8 miles south-west) and The Pumphouse Educational Museum (under half a mile east). The countryside around Shadwell includes Lavender Pond and Tower Hill.
Nearby places to Shadwell
More services for Shadwell
Landlord and commercial work in Shadwell
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. We have worked in hotels as well as homes and businesses.
When it is not the sealant
Sealant is not the answer to every problem, and we’d rather say so up front. Sealant will not put right:
- Sash cords, weights and draught-proofing of the sashes
- Decayed frames that need repair
- Masonry that needs repairing
If in doubt, phone 0345 464 0079 or send us an email and we will say what we think.
Joints and surfaces we work on
- Tenement windows
- Sash and case windows
- Stone surrounds
- Brick reveals
- Period & listed homes
- Timber door frames
Why it’s worth doing now in Shadwell
Not every filler suits an old window surround. Sand mastic matches what was there and that can be important for listed homes. In London conversions, one flat’s bathroom is often above another flat’s ceiling, 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.
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether the work is at height. Your quote takes all of that into account.
Why book with us
- Anti-fungal silicone where joints get wet
- Tidy, careful work
- 12-month guarantee on every job
- Approved under the ARBOMaster scheme
Take a look at how sealant jobs are priced or customer reviews.
Should I try it myself first?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Quotes for sand mastic in Shadwell
Call for a quick quote. What matters most is:
- Mould in or behind the old joints
- How many areas need sealing
- The old material and how stubborn it is
- Whether the work is at height
Doing several joints on one visit is generally more efficient than separate visits. You will get one clear quote for the whole job.
Asking for a quote
To help us quote quickly, please include:
- How we’d reach the joints
- Any previous sealing or DIY work
- Photos by email, if that’s easy
- The type of property
We quote each job on its own, so the first step is telling us about yours. Just phone 0345 464 0079 or email us with the details.
Shadwell questions
Can parking be tricky for a visit in Shadwell?
In much of London, parking needs planning: a visitor permit or a nearby bay makes the day run more smoothly.
Do you cover Shadwell for sand mastic?
Yes, Shadwell is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or drop us an email and tell us what needs doing.
Where is Mr Mastic based?
Our base is Crawley, with over 20 years’ experience. Our area covers South East England, London and Scotland.
Is it possible to paint over sand mastic?
Traditional guidance is not to paint over sand mastic. If you are redecorating the window, ask us first and we’ll advise.
Is sand mastic better than silicone for my windows?
That depends on your windows. Period windows in stone or brick usually suit sand mastic, while modern frames normally get a flexible sealant.
What should I tell you?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
Can you replace silicone on a period window with sand mastic?
Yes. We remove the silicone and clean the joint before the sand mastic goes in.
Do you work for hotels and businesses?
Yes, regularly. We can plan bigger jobs in stages to suit the site.
What we do, step by step
There’s no need to move everything out before we come, only the area right around the joints. Everything nearby is protected, and the work takes a few hours per window, depending on the condition of the joints for a typical job. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Shadwell. It helps if you can point us to a visitor permit or a bay close to the door.
- We start by checking each surround and agreeing the joints to renew.
- The loose and crumbling mastic is raked out and the joint cleaned.
- Deep voids are packed so the mastic is the right thickness.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
Before we arrive
- Plan for the work area to be out of bounds to pets and children
- Let us know if you’ve seen damp or leaks
- For indoor joints, keep the area dry beforehand if you can
Getting a quote
For sand mastic in Shadwell, ring 0345 464 0079 or send us an email. Tell us what the problem is and where, and we’ll agree the price before any work begins.