Kent · England
New Hythe External Mastic
External mastic for New Hythe, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Plants rooting in failed movement joints
- Weathered mastic that no longer stretches
- Brick movement joints where the sealant has split
External mastic for homes and businesses in New Hythe
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Porous or awkward surfaces are primed where the sealant needs it and we use one wherever it does. If you have movement joints filled with mortar instead of sealant and joints where the bead has come unstuck, we can put it right.
Around New Hythe, older buildings can be stone, brick or timber-framed, many with extensions added later. The joints where those materials meet are the weak points, and they need the right sealant at the right depth.
Big or small, it’s backed by our 12-month guarantee in New Hythe and across Kent.
- Place
- New Hythe (ME20)
- Region
- Kent
- Cover
- A year, on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Leave it or put it right?
Running new sealant over the old bead rarely lasts. New sealant does not bond well to old, weathered sealant, so we always take the old sealant out. Around New Hythe, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.
Why us?
- Fully insured
- Any old sealant cut out fully, not covered over
- More than 20 years in sealant work
- White, clear, grey or another colour, product permitting
Take a look at what affects the cost or our reviews.
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. We suggest:
- Keep water from gutters off the wall
- Check the sealant is paintable before painting near it
- Tell anyone working on the walls about the movement joints
- Avoid pressure-washing directly into sealant joints
Keep the joints clear of soil, plants and climbing growth. Damp material against the sealant shortens its life.
Act while the splits are small. Then it’s a straightforward cut-out and reseal.
What we do, step by step
When we get to you, we check the joints match what you told us. If anything is different, we explain it before carrying on. Most jobs then take a few hours for a handful of joints, longer for a whole elevation. For a village or hamlet like New Hythe, the journey is planned in advance: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
How to prepare
- For business premises, tell us about site rules or sign-in
- Tell us about any water getting in
- Where the joints are inside, avoid wetting them before we arrive
How to get a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we will talk you through what we’d do. When it suits you, phone 0345 464 0079 or email us.
Related advice
When it isn’t the sealant
To be straight with you, some problems need a different trade:
- Damp that isn’t coming from the joint
- Subsidence or other structural problems
- Cracks in the bricks or render themselves, away from the joints
If in doubt, ring 0345 464 0079 or send us an email and we will say what we think before booking.
Joints and surfaces we work on
- Brickwork movement joints
- Joints between brick and frames
- Render & cladding joints
- Façade panels
- Concrete & block
- Copings & trims
Should I try it myself first?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.
A careful DIYer can reseal a simple joint, 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.
How we quote for external mastic
Your quote is based on your job. We take into account:
- Whether the work is at height
- How many rooms, windows or areas are involved
- Any working-time requirements on site
- Which sealant suits the joint
Leaving a failed joint usually makes the job bigger, not smaller. If you’re unsure, phone 0345 464 0079 or email us and we will give you an honest view and a quote.
Helping us quote
To make quoting easier, let us know:
- Whether it’s a home or a business
- The problem you’ve noticed
- Roughly how big the job is
- Photos by email, if that’s easy
Want a quote for external mastic? Please phone 0345 464 0079 or send us an email and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
What external mastic looks like in 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. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material. London and the South East are among the drier parts of the UK, 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, old and new materials meet at the roofline and walls, which is where sealant earns its keep. For site and facilities teams at buildings such as Brookfield Junior School, its movement joints, gutters and trims need looking after like any other building’s.
New Hythe is about 4 miles north-west of Maidstone, in Kent. Wherever you are in the ME20 postcode area, we cover external mastic for homes and businesses. New Hythe is one of 922 towns and villages in Kent where we work for external mastic. London is on our list too, around 27 miles away.
Here we cover the ME20 postcode area for external mastic. That includes homes and businesses on Sherwood Avenue, Ingram Close and Abery Drive. Nearby, we also carry out external mastic in 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). Larger places within reach include 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).
What’s near New Hythe
Typical jobs here are in homes near Aylesford School, The Monks Head pub and Leybourne Lakes Country Park, among other places. New Hythe has its own railway station: New Hythe station. Well-known places in the area include Maidstone Hospital (2.8 miles south-east) and Medway megaliths (2.1 miles east). Open spaces near New Hythe include Blue Bell Hill and Burham Down.
Also in New Hythe
Common questions in New Hythe
Will you come out to New Hythe?
Yes. New Hythe is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you cover New Hythe for external mastic?
Yes. Our work covers London and the South East, and New Hythe is part of that. You can call 0345 464 0079 or drop us an email and tell us what needs doing.
What sealant do you use?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference, and we’ll explain our choice.
Is it messy?
Not at all. The area is protected while we work and cleaned up afterwards.
What colours does the sealant come in?
The sealant colour is picked to suit the wall, so the joint sits quietly in the wall. There’s a wide choice of exterior colours.
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.
How long does external mastic last?
There’s no fixed answer: joints on exposed walls or with a lot of movement age sooner. A yearly look will tell you when they need doing. Every job carries our one-year guarantee.
I rent my home. Can I book you?
Of course. Check with your landlord; we can send the quote to them too.
When to call us in New Hythe
Sometimes a movement joint was filled with mortar or a rigid filler by mistake. The joint can’t move, so the wall cracks somewhere else instead.
Keep an eye out for any of the following:
- Brick movement joints where the sealant has split
- Weathered mastic that no longer stretches
- Leaking joints around cladding and façade panels
- Sealant that has lost its bond to the brick or render
For landlords with property near New Hythe station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Comparing quotes
- When the joint can take water or movement
- How the joint is cleaned and prepared
- The length of the guarantee
- Who turns up on the day