Kent · England
Window Mastic in New Hythe
Professional window mastic in and around New Hythe, with old sealant always removed completely.
- Leaking joints at the ends of sills
- Sealant in the wrong colour for the frame
- Damp patches on the reveal after heavy rain
Questions from New Hythe
Is New Hythe within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
I let a flat near New Hythe station. Can you help?
Yes, landlords and agents are among the people we work for. You can ring 0345 464 0079 or send us an email with the details for a clear quote.
Does someone need to be in?
If the work is inside, we need someone to let us in. Once we’ve agreed the job, you don’t need to watch us work.
Can resealing stop a draught around my window?
Often, yes. The gap between frame and wall is a common source of draughts, and sealing the inside and outside joints closes that path.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. We cover New Hythe and the rest of Kent, along with the rest of our area.
Do you take out the old sealant first?
Yes, every time. New silicone does not stick to old silicone, so any old material comes out before anything new goes in.
Is the new sealant paintable?
That depends on the product. Some hybrid sealants can be painted; silicone can’t. Tell us if you are decorating and we will choose accordingly.
Can you quote for more than one area?
Yes. More than one area can be quoted together.
Window mastic for homes and businesses in New Hythe
The mastic around a window or door seals the gap between the frame and the wall. When it cracks, hardens or pulls away, draughts and rain get in. Our applicators cut it out and replace it with a flexible, weatherproof sealant. We are often asked to deal with white mastic on grey or black frames and water coming in at the bottom corners of a door, on composite doors, timber windows & doors and aluminium frames.
Around New Hythe, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
There’s a 12-month guarantee on every job.
- Location
- New Hythe (ME20)
- Wider area
- Kent
- Cover
- A year, on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Looking after it afterwards
Once the sealant has cured, a few habits help it last:
- Keep solvents and bleach off the sealant
- Air rooms to keep condensation down around windows
- Clean frames with a soft cloth and soapy water
- Repaint timber before it’s bare
Timber frames need their paint kept up, because bare, wet timber moves more and pulls at the joint. Keep paint off the silicone itself.
Water gets in quietly when mastic fails. You might not see it until plaster blows or a damp patch appears inside. Early resealing stops it reaching that point.
Frames and glazing around New Hythe
With historic houses such as Starkey Castle (about 3.7 miles north) nearby, there’s older building stock in the area around New Hythe as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you live in an older home near Church of the Holy Trinity, frames set in older brick or stone need a sealant that suits the wall as well as the frame. Schools such as Brookfield Junior School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages.
New Hythe is about 4 miles north-west of Maidstone, in Kent. Our applicators cover window mastic for householders, landlords and businesses in New Hythe and nearby, as part of our work across Kent. Our area takes in 922 places across Kent. You can also see our page for London, about 27 miles away.
Work in ME20 works the same way as everywhere else we cover. You’ll find streets such as Sherwood Avenue, Ingram Close and Abery Drive, and we cover them all. We also cover the places around New Hythe: Lunsford (1 mile west), Larkfield (1 mile south-west), Leybourne (1 mile south-west), Eccles (1 mile north-east) and Snodland (1 mile north-west). We also work in nearby towns such as Maidstone (4 miles south-east), Sittingbourne (12 miles east), Dartford (13 miles north-west), Sevenoaks (12 miles west), Royal Tunbridge Wells (14 miles south-west) and Gravesend (9 miles north).
Around New Hythe
In New Hythe, that means homes and buildings near Aylesford School, The Monks Head pub and Leybourne Lakes Country Park. There’s a railway station in New Hythe itself: New Hythe station. Well-known places in the area include Maidstone Hospital (2.8 miles south-east) and Medway megaliths (2.1 miles east). Green spaces nearby include Blue Bell Hill and Burham Down.
More services for New Hythe
Quotes for window mastic in New Hythe
The price is agreed before any work begins. It takes into account:
- Which sealant suits the joint
- Mould in or behind the old joints
- How many rooms, windows or areas are involved
- When we can work, for business premises
Leaving a failed joint usually makes the job bigger, not smaller. 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.
Asking for a quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- If it’s domestic, commercial or a hotel
- A few pictures by email, if you can
- Whether it has been sealed before
- Where the job is, and your postcode
Getting a quote is simple: let us know what needs doing and where. A few pictures by email make the job easier to understand, and we’ll take it from there.
Why deal with it now?
The work is quick compared with the damage it prevents: it takes a few hours for a handful of frames, longer for a whole house. Wait for damp to appear and there may be plaster and decorating to sort out too. Older cottages and farmhouses around New Hythe can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
No two jobs are quite the same, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference, and we will explain the quote if you ask.
Why choose Mr Mastic in New Hythe
- Colour agreed with you before we start
- Homes, businesses and hotels
- We never seal over old sealant
- White, clear, grey or another colour, product permitting
Different surfaces, different methods
Composite doors
Front doors take the weather head on, and the top and bottom corners tend to fail first. We pay most attention there.
Window sills
Sills catch the water running down the glass, so the joints at each end and underneath matter. Each is cleaned out and resealed.
Common problems we fix in New Hythe
Mastic ages in the weather. UV light hardens the outside of the bead, until it loses its stretch and starts to crack.
If you can see any of these, it’s time to have the joints looked at:
- Mastic that is falling out in pieces
- Rushed sealant from a window installation
- Mastic that has split away from the wall
- Cold air getting in at the frame edge
For landlords with property near New Hythe station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
What your quote should include
- Who does the work, and how experienced they are
- Whether VAT is included
- Which colour the sealant will be
- How long the guarantee is
DIY versus a professional finish
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
What happens on the day
When we get to you, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. Most jobs then take most of a day for a typical house, less for a few frames. In a small place like New Hythe, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each frame is looked over and we agree which ones need resealing.
- We remove the old mastic and clean the frame edge and wall.
- Deep gaps get closed-cell backing rod to set the depth.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- We tool each bead neatly and check every joint is closed.
Before we arrive
- Tell us about any water getting in
- Plan for the work area to be out of bounds to pets and children
- Tell us about access, such as stairs, a lift or high-level joints
Ask for a quote
If you’re in New Hythe and need window mastic, phone 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.