Kent · England
Sand mastic for sash & case windows in Bessels Green, Kent
Professional sand mastic in and around Bessels Green, with every bit of old sealant taken out first and a 12-month guarantee.
- Gaps where the frame meets the masonry
- Old cement repairs round a window that have failed
- Silicone on a period window that looks wrong
Honest limits
New sealant cannot fix everything, and we’d rather say so up front. It will not solve:
- Sashes that rattle, stick or will not open
- Planning or listed building consent (your local planning authority decides)
- Crumbling stone or brickwork round the window
If in doubt, call 0345 464 0079 or drop us an email and we’ll say what we think.
Joints and surfaces we work on
- Stone surrounds
- Period & listed homes
- Brick reveals
- Timber door frames
- Sash and case windows
- Tenement windows
How we handle sand mastic in Bessels Green
Traditional burnt sand mastic blends with stone and brick surrounds. It’s a good fit for period properties, where modern sealant can look out of place. We work on brick reveals, period & listed homes and timber door frames, and the jobs we see most are cracked mastic round a front door frame and draughts and rain around sash boxes.
Outdoor sealant needs dry, clean surfaces, so work on frames around Bessels Green is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
Whatever the size of the job, you get the same 12-month guarantee.
- Place
- Bessels Green (TN13, TN14)
- Region
- Kent
- Cover
- One year on every job
- Price
- A clear price before we start
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What sand mastic looks like in Bessels Green
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Knole House (about 2.2 miles south-east) are a reminder that the area around Bessels Green has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
For landlords with property near Sevenoaks station, older sash windows in a rental need their mastic kept sound to keep the weather out. For an older house near a landmark such as Chapel of the Good Shepherd, 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 Riverhead Infants' School, larger buildings have plenty of frames, and the mastic around each one ages.
Bessels Green is about 1 mile west of Sevenoaks, in Kent. Whether you are in the middle of Bessels Green or further out, sand mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Our area takes in 922 places across Kent, from the larger towns to small villages. Our London page covers work nearby, about 19 miles away.
Work in TN13 and TN14 is quoted and booked the same way as anywhere else. You’ll find streets such as High Street, Witches Lane and Cranmer Road. Close by, we work in Chipstead (1 mile north-west), Riverhead (1 mile north-east), Kippington (1 mile south-east), Dunton Green (1 mile north-east) and Sevenoaks (1 mile east). Within a short drive, we also cover Dartford (12 miles north), Royal Tunbridge Wells (11 miles south-east), Gravesend (14 miles north-east), Tonbridge (8 miles south-east), Northfleet (13 miles north-east) and Swanley (8 miles north).
What’s near Bessels Green
Around Bessels Green, our work takes us to homes and buildings near Montreal Park, New Beacon School and The King's Head Public House and the streets around them. Bessels Green’s nearest station is Sevenoaks station, about 1 mile east of the centre. Nearby you will also find Kemsing Castle Bank (3.6 miles north-east) and Sevenoaks Hospital (1.7 miles east). Open spaces near Bessels Green include Betsom's Hill and Dryhill Nature Reserve.
What affects the quote in Bessels Green
Your quote is based on your job. We look at:
- Whether the work is at height
- Whether there’s mould to deal with
- When we can work, for business premises
- Which sealant suits the joint
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are not sure whether it needs doing, phone 0345 464 0079 or email us for an honest opinion and a quote.
Helping us quote
Photos help, but a description is a good start. Please mention:
- Any previous sealing or DIY work
- The rough size of the job
- Whether it’s a home or a business
- Photos by email, if that is easy
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is.
DIY sealant or a professional job?
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
What happens if it’s left?
Silicone might seem the quicker option, but it can look wrong on a period surround. Sand mastic suits the building and finishes neatly against the masonry. Where a wall is exposed, as many are in small places like Bessels Green, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
We do not show prices on the website, because the cost depends so much on the job itself. Call for a quick quote.
Why choose Mr Mastic in Bessels Green
- Quality sealants from Arbo and Everbuild
- More than 20 years in sealant work
- We are fully insured
- Every job guaranteed for a year
See what affects the cost and customer reviews.
Common questions in Bessels Green
Do you work for landlords with property near Sevenoaks station?
Yes. We work for landlords and agents as well as householders, and several properties can go on one quote. Just call 0345 464 0079 or email us with the address and what needs doing, and we’ll send you a clear quote.
Can you do sand mastic in Bessels Green?
Yes. We work across London and the South East, and Bessels Green is part of that. Just call 0345 464 0079 or drop us an email with a few details of the job.
What sealant do you use?
It depends on the joint: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. We use products from Arbo and Everbuild.
Do you work for hotels and businesses?
Yes. Commercial and hotel work is a large part of what we do, as well as homes. Working times can be discussed when we quote.
Will the old sealant be removed?
Yes. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
Do you have insurance?
Yes. We’re fully insured, and we can confirm the details when we quote.
Are you ARBOMaster approved?
Yes. We’re approved under the ARBOMaster scheme, the approved applicator scheme for Arbo sealants.
Is it OK to seal over old sealant?
No, because it fails. The old sealant always comes out first, so the new sealant bonds properly.
Work for landlords, hotels 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.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. We can quote for more than one property at once.
Different surfaces, different methods
Period and listed homes
A traditional finish suits a period property.
Tenement and terrace windows
Windows above ground floor need the right access. Let us know the floor and we’ll confirm access.
How it works
We keep the work tidy and contained to the area we’re working on, so you can carry on as normal. The job generally takes anything from a few hours to a full day, depending on how many windows, and we explain the cure time before we leave. Somewhere like Bessels Green needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We check the window surrounds and agree which joints need renewing.
- Old, loose mastic is raked out and the joint cleaned.
- We pack any deep gaps so the mastic sits at the right depth.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
Preparing for the visit
- Mention if the joints have been sealed before
- Where the joints are inside, avoid wetting them before we arrive
- Tell us about access, such as stairs, a lift or high-level joints
Ask for a quote
Every job is quoted individually, so start by telling us what you need. Just call 0345 464 0079 or drop us an email with the details and send pictures if you have them.