Kent · England
Radfield External Mastic
External mastic in Radfield from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Weathered mastic that no longer stretches
- Brick movement joints where the sealant has split
- Cracked joints where brick meets render or frames
How we handle external mastic in Radfield
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Some surfaces need a primer before sealing, and we do not skip that step. If you are dealing with cracked joints where brick meets render or frames and rain getting behind render or cladding at a joint, we can help.
Outside joints can only be sealed when they’re dry, so work in Radfield is booked around the forecast. Let us know about access to every wall, plus any garages or outbuildings.
There’s a 12-month guarantee on every job, large or small.
- Place
- Radfield (ME9)
- Region
- Kent
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Can I do it myself?
If you’ve already had a go yourself, that is fine. We cut it out and start again, so tell us about it when you ask for a quote.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Work for landlords, hotels and businesses
From a single let to a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
We also work for property managers and facilities teams in Radfield and across Kent. We can quote a run of properties together, and we are fully insured.
Signs you need external mastic in Radfield
UV, rain and frost all age exterior sealant. Over the years it hardens, cracks on the surface and loses its give, so the joint eventually tears or comes away from one side.
Keep an eye out for any of the following:
- Damp patches traced to an open external joint
- Old sealant gone brittle and cracked
- Joints with sealant missing in places
- Gaps where render, brick and frames meet
For landlords with property near Teynham station, outside joints that have cracked can let damp into a rental, so check them between lets.
Questions to ask before you book
- Is VAT in the price?
- The length of the guarantee
- Who does the work, and how experienced they are
- How hidden problems are handled
What we do, step by step
We bring everything the job needs with us, so there’s nothing for you to buy. After a quick look at the joints together, the area is protected and the work begins. It normally takes a few hours for a handful of joints, longer for a whole elevation. In a small place like Radfield, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
How to prepare
- Where the joints are inside, avoid wetting them before we arrive
- Tell us if parking is tricky
- Mention any sign-in or site rules at work premises
Getting a quote
For a quote, ring 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. You’ll have a clear quote before any work starts.
Related advice
Places near Radfield
Also in Radfield
What external mastic looks like in Radfield
Radfield is within about 3 miles of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
In the older streets around Church of St Lawrence, older walls, gutters and the joints where extensions meet them need a flexible sealant. Schools such as Teynham Parochial Church of England Primary School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Radfield is about 2 miles east of Sittingbourne, in Kent. If you need external mastic in Radfield, it’s easy to get a quote: please call 0345 464 0079 or send us an email. We cover Kent from our Crawley base, Radfield included. Radfield is one of 922 towns and villages in Kent we cover. Chelmsford is on our list too, around 31 miles away.
Jobs for external mastic in ME9 is quoted and booked the same way as anywhere else. If you are just outside Radfield, we cover Bogle (1 mile south-east), Tonge Corner (1 mile north), Rodmersham (1 mile south-west), Lynsted (1 mile south) and Bapchild (1 mile south-west). Further out, we also cover Maidstone (12 miles west), Ashford (14 miles south), Canterbury (13 miles east), Whitstable (11 miles east), Faversham (5 miles east) and Herne Bay (15 miles east).
Around Radfield
In Radfield, that means homes and buildings near Sittingbourne Community College and Fox pub and the streets around them. The closest station to Radfield is Teynham station, roughly 0.9 miles east. Nearby you will also find Bayford Court (2 miles north-west) and Sittingbourne Heritage Museum (1.9 miles west).
What sealant work can’t fix
Some problems need a builder, plumber or other trade rather than us:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Failed render or damaged cladding panels
- Cracks in the bricks or render themselves, away from the joints
If you’re not sure, just phone 0345 464 0079 or send us an email and we’ll give you a straight answer before you book.
Surfaces we seal
- Joints between brick and frames
- Brickwork movement joints
- Concrete & block
- Copings & trims
- Render & cladding joints
- Façade panels
Keeping the joints in good condition
How long the joints last depends on use and care. Here’s what we suggest:
- Clear growth from the base of walls and joints
- Show decorators and builders where the movement joints are
- Keep movement joints as flexible joints, not mortar
- Look over the joints every year, ideally after winter
Have a quick look at the joints each spring. Splits, gaps at the edges or plants in the joint are early warning signs.
Gaps, plants or missing sealant in a joint are worth getting looked at. Earlier resealing means a smaller job and a better result.
FAQs for Radfield
Can you help a landlord with a rental near Teynham station?
Yes, landlords and agents are among the people we work for. Just ring 0345 464 0079 or send us an email with the address and what needs doing, and we’ll send you a clear quote.
Does living near the coast affect external mastic in Radfield?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. The right product, a clean joint and the right depth all help it cope.
Do you cover Radfield?
Yes. From our base in Crawley, we cover South East England, London and all of Scotland.
How do you reach high-level joints?
It depends on the height and the site. Ground-floor joints are simple; for higher work, tell us about the building and we’ll confirm what’s needed.
Will the old sealant be removed?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
Can I add another job to the visit?
Yes. More than one area can go on one quote.
Are you insured?
Yes. We’re fully insured, and we can confirm the details when we quote.
What information do you need?
The location, the problem and the rough size of the job. If you can, email a few photos.
What affects the cost of external mastic
You’ll get a clear quote before any work starts. It takes into account:
- Whether there’s mould to deal with
- Whether the work is at height
- The number and length of the joints
- The type of sealant required
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
Asking for a quote
To make quoting easier, let us know:
- If it’s domestic, commercial or a hotel
- Pictures of the joints, sent by email
- How many joints, rooms or windows are involved
- Where the property is
Every job is quoted individually. Simply ring 0345 464 0079 or drop us an email and describe the job.