Slough · England
Datchet Window Mastic
Specialist window mastic for Datchet: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Rain getting in at the frame or under the sill
- Draughty joints inside around the window
- Leaking joints at the ends of sills
Datchet questions
Can you help a landlord with a rental near Datchet station?
Yes, rental work is part of what we do. Just call 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear price.
Will you come out to Datchet?
Yes, we do. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
How long should I leave it?
Different products cure at different speeds, so please follow the time we give you.
Do the sealants smell?
It depends on the product. Some products have a noticeable smell, others very little, and any smell fades as they cure.
Will you leave a mess?
We keep the work tidy. We protect what’s around the joints, and the area is left clean when we finish.
Are you an approved applicator?
Yes. We’re an ARBOMaster approved applicator, which is run for the Arbo sealant brand.
Do you remove the old sealant?
Yes. We cut out all the old sealant and clean the joint before resealing.
Where do you work from?
Our base is in Crawley, West Sussex, and we work across South East England, London and Scotland.
Window mastic in Datchet
Behind a thin line of old mastic there’s sometimes a deep void. Filling it with sealant alone leaves a joint that can’t move properly, so deep gaps get backing rod first. The sealant then grips the two sides it should. If you have sealant in the wrong colour for the frame and rain getting in at the frame or under the sill, we can help, whatever the surface.
In smaller places like Datchet, homes range from older cottages to newer houses, with windows to match: timber, uPVC and aluminium. Each frame material needs the right sealant against the right wall.
Our work is backed for twelve months.
- Location
- Datchet (SL3)
- Wider area
- Slough
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What affects the cost of window mastic
The price is agreed before any work begins. It’s based on:
- Access and height
- The product the joint needs
- The old material and how stubborn it is
- How many areas need sealing
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs, plus any working-time requirements on site. Call for a quick quote and we’ll explain what it covers.
What to tell us for a quote
To help us quote quickly, please include:
- Whether it’s a home or a business
- How many joints, rooms or windows are involved
- The address or postcode of the job
- Pictures of the joints, sent by email
Need a quote? Please ring 0345 464 0079 or send us an email with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
Windows and doors in Datchet
Historic houses like Frogmore House (about 1 mile south-west) are a reminder that the area around Datchet has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
In the older streets around Church of St Mary, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. For landlords with property near Datchet station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Datchet is about 2 miles east of Windsor, in Slough. Every kind of property in Datchet is covered for window mastic, old or new, large or small. Every job comes with our 12-month guarantee. Datchet is one of 31 places in Slough where we work. There’s also a page for Reading, about 17 miles away.
Jobs for window mastic in SL3 works the same way as everywhere else we cover. You’ll find streets such as High Street, London Road and Percy Place. Other places close to Datchet include Ditton (1 mile north-east), Myrke (1 mile north-west), Sunnymeads (1 mile south-east), Brands Hill (2 miles east) and Old Windsor (2 miles south). Within a short drive, we also cover Slough (3 miles north-west), Cippenham (3 miles north-west), Britwell (4 miles north-west), Burnham (5 miles north-west), Stoke Poges (4 miles north) and Huntercombe (4 miles north-west). Datchet is one of the larger places we cover in Slough.
Around Datchet
We work in homes and buildings around St George's School, The Royal Stag pub and Home Park and the streets around them. Datchet has its own railway station: Datchet station. Nearby you’ll also find Museum of Eton Life (1.5 miles west) and Upton Hospital (1.7 miles north-west). For a walk, there’s Staines Reservoirs.
Common problems we fix in Datchet
Joint shape matters as much as the product. A skim of sealant over a wide gap soon tears, and a gap filled solid cannot flex. Backing rod sets the right depth.
Any of these means the joints need attention:
- Cracked sealant at the sill ends
- Rain getting in at the frame or under the sill
- Mastic that has split away from the wall
- Mastic that is falling out in pieces
For site and facilities teams at buildings such as Datchet St Mary's CofE Primary School, its window and door frames need their mastic kept sound, just like a home’s.
Comparing quotes
- How the surfaces are prepared before sealing
- Whether you can choose the colour
- How long to leave it before use
- What the quote includes, VAT included or not
Places near Datchet
What else we do in Datchet
The process
There’s no need to move everything out before we come, only the area right around the joints. Everything nearby is protected, and the job takes most of a day for a typical house, less for a few frames in most cases. A visit to Datchet is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely, along with any loose debris.
- The surfaces are cleaned and left dry.
- Backing rod fills deep voids and the sealant goes in on top.
- We tool the joint so water runs off, then clear up.
How to prepare
- Where the joints are inside, avoid wetting them before we arrive
- Tell us if parking is tricky
- Clear the area around the work
Get a quote
We quote each job on its own, so the first step is telling us about yours. Just call 0345 464 0079 or email us with the details.
Advice
For landlords and businesses
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Looking after it afterwards
To keep the joints looking good and working properly:
- Air rooms to keep condensation down around windows
- Keep paint off silicone joints
- Repaint timber before it’s bare
- Do not aim a pressure washer at the joints
Silicone can’t normally be painted, so mention any painting plans before any work starts. There are paintable sealants for joints that need it.
Water gets in quietly when mastic fails. You might not see it until plaster blows or a damp patch appears inside. Catching it early keeps the fix to a reseal.
What happens if it’s left?
A quick bead over the top of old mastic looks like an easy fix, but it won’t grip old, dirty sealant. It peels before long, and water still gets in behind. The old mastic has to come out. In an older home around Datchet, damp from a failed joint can get into timber and plaster, and that is a much bigger job than renewing the sealant.
What you pay reflects the work, not guesswork. That’s why we ask a few questions first.
Why choose Mr Mastic in Datchet
- 4.9 on Google from 180+ five-star reviews
- Approved under the ARBOMaster scheme
- Experience in homes, commercial sites and hotels
- 20+ years of sealant experience
Read what affects the cost or what customers say.
Surface by surface
Patio & French doors
Patio and French doors have the longest joints on most houses. The threshold and the bottom corners take the most water, so we pay close attention there.
Composite doors
Draughts round the door leaf usually come from worn seals or adjustment, not the mastic. We seal the frame and let you know about anything else.