Medway · England
External & façade joints in Grain, Medway
Professional external mastic in and around Grain, with old sealant always removed completely and a 12-month guarantee.
- Gaps where render, brick and frames meet
- Panel joints letting water in
- Water getting into walls through failed joints
External mastic in Grain
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. We pick a colour that sits well with the wall so the line blends in. Typical jobs include old sealant gone brittle and cracked and rain getting behind render or cladding at a joint, on façade panels, concrete & block and copings & trims.
External sealant needs dry, clean surfaces, so work around Grain is planned for dry weather. Let us know about access to every wall, plus any garages or outbuildings.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Location
- Grain (ME3)
- Region
- Medway
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Outside joints around Grain
Grain is close to 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. 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.
Rented homes near Sheerness-On-Sea station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies. Schools such as St James Church of England Primary Academy are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. For an older house near a landmark such as Church of St James, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Grain is about 5 miles north-west of Minster, in Medway. If you need external mastic in Grain, it’s easy to get a quote: please phone 0345 464 0079 or email us. We cover Medway from our Crawley base. Across Medway, we cover 68 places, Grain among them. For nearby work, see our Chelmsford page (22 miles or so).
Every address in ME3 is covered for external mastic, from the main roads to the quietest streets. Streets in the area include High Street, Power Station Road and Chapel Road, and we cover them all. Other places close to Grain include Wallend (1 mile west), Blue Town (2 miles south-east), Sheerness (2 miles south-east), Queenborough (3 miles south-east) and Rushenden (3 miles south). We also work in nearby towns such as Gillingham (8 miles south-west), Chatham (10 miles south-west), Rochester (10 miles south-west), Rainham (8 miles south-west), Strood (11 miles south-west) and Luton (10 miles south-west).
Near you in Grain
Locally, jobs take us to homes and businesses close to The Hogarth Inn and the streets around them. Grain’s nearest station is Sheerness-On-Sea station, about 2.1 miles south-east. Nearby you will also find Bluetown Heritage Centre (1.8 miles south-east).
Grain questions
Does the coastal weather in Grain affect outside sealant?
Near the sea, outside joints face more wind, rain and salt than they would inland, so the choice of sealant and the preparation matter even more. Walls facing the sea are normally the first to need attention.
Can you help a landlord with a rental near Sheerness-On-Sea station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can phone 0345 464 0079 or email us with the details for a clear quote.
How long will you be here?
As a guide, most jobs take anything from a few hours to several days, depending on the building. Bigger jobs take longer, and we’ll tell you how long to expect.
Are you ARBOMaster approved?
Yes. We’re approved under the ARBOMaster scheme, the approved applicator scheme for Arbo sealants.
Can you do several jobs on one visit?
Of course. Combining jobs makes good use of the visit.
What do you need from me for a quote?
A short description and the location, plus pictures if you have them. If we need more, we will ask.
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 will tell you what we’re using.
Do you work in Grain?
Yes, we do. Grain is part of the area we cover, and the service is the same as everywhere else.
The process
A visit follows a simple pattern: we check the joints, mask and protect the surrounding surfaces, do the work and tidy away. It usually takes a few hours for a handful of joints, longer for a whole elevation. Somewhere as small as Grain, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by checking each joint, agreeing the ones to redo and how we’ll reach them.
- The old mastic and anything lodged in the joint is removed.
- Both sides are cleaned back to sound material and primed if needed.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Getting ready for the visit
- Mention any tricky access
- For indoor joints, keep the area dry beforehand if you can
- Mention any parking rules near the property
How to get a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we’ll explain what’s involved before giving you a price.
Read more
Why it’s worth doing now in Grain
It often makes sense to reseal all the failing joints on an elevation together. They’ve weathered the same way and it means sorting access once. Older cottages and farmhouses around Grain can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
What you pay reflects the work, not a rough estimate. That is why we ask a few questions first.
Why choose Mr Mastic in Grain
- Any old sealant cut out fully, not covered over
- Neat joints and a tidy finish
- White, clear, grey or another colour, product permitting
- Approved under the ARBOMaster scheme
Read what affects the cost or our reviews.
Looking after it afterwards
A little care helps the new joints last. Our advice:
- Point out the joints to other trades
- Avoid pressure-washing directly into sealant joints
- Act on the first splits you see
- Deal with leaking gutters that soak the joints below
Make sure anyone working on the wall later knows where the movement joints are. They should be kept open and resealed, not filled.
Act while the splits are small. Then it’s a straightforward cut-out and reseal.
Should I try it myself first?
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
Places near Grain
Also in Grain
Work for landlords, hotels and businesses
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
Whether it’s one flat or a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.
When it is not the sealant
We’ll always be straight with you, so here’s what sealant can’t fix:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Render that is blown, hollow or coming away
- Cutting new joints into brickwork, which is building work rather than sealant work
If you’re not sure, just call 0345 464 0079 or drop us an email and we will give you a straight answer.
Surfaces we seal
- Joints between brick and frames
- Façade panels
- Concrete & block
- Render & cladding joints
- Brickwork movement joints
- Copings & trims
How the job changes by surface
Copings and trims
Joints in copings, parapets and trims are exposed to the worst of the weather. We reseal them with an exterior sealant suited to the material.
Brickwork movement joints
Brick movement joints are often mistaken for a missing mortar line. If that is happened, we rake it out and reseal it properly.