Kent · England
External Mastic in Blean
Movement joints in Blean need attention? We cut out the old, prepare the joints and apply the right sealant.
- Brick movement joints where the sealant has split
- Failed seals between different materials
- Old sealant gone brittle and cracked
Keeping the joints in good condition
So the new joints stay in good condition:
- Never let anyone fill a movement joint with mortar
- Get split or bare joints resealed while the damage is small
- Avoid pressure-washing directly into sealant joints
- Ask before painting over external sealant
Make sure anyone working on the wall later knows where the movement joints are. They should be kept open and resealed, not filled.
Leaks behind façade panels and render often go unseen. When it finally shows inside, the joint may have been open for years so early resealing is worth it.
About our external mastic in Blean
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. We pick a colour that sits well with the wall. If you have movement joints with cracked, split or missing sealant and gaps where render, brick and frames meet, we can help, on render & cladding joints, concrete & block and copings & trims alike.
External sealant needs dry, clean surfaces, so work around Blean is planned for dry weather. Tell us about access to all sides of the building, including outbuildings and garages.
Every job is covered by a one-year guarantee.
- Where
- Blean (CT2)
- Region
- Kent
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What else we do in Blean
Honest limits
Honest advice matters more to us than a booking, so here’s what new sealant won’t do:
- Damp that isn’t coming from the joint
- Failed render or damaged cladding panels
- Cracks in the bricks or render themselves, away from the joints
If in doubt, phone 0345 464 0079 or drop us an email and we’ll say what we think before you book.
Joints and surfaces we work on
- Concrete & block
- Joints between brick and frames
- Copings & trims
- Render & cladding joints
- Façade panels
- Brickwork movement joints
Landlords, agents and businesses in Blean
We also work for property managers and facilities teams. Several sites can be quoted together.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. Several properties can go on one quote.
DIY sealant or a professional job?
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Why it’s worth doing now in Blean
A failed movement joint lets water into the wall, behind render and cladding. Dealing with it early keeps the repair to the joint, rather than the wall around it. In a small place like Blean, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Homes and businesses are quoted the same way: the amount of work, the access and the products needed. Call for a quick quote and we’ll go through it with you.
Why choose Mr Mastic in Blean
- Colour picked to suit the job
- Experience in homes, commercial sites and hotels
- Approved under the ARBOMaster scheme
- A choice of colours where the product allows
See our cost guide and what customers say.
Blean questions
Do you work for landlords with property near Canterbury West station?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before any work starts.
Do you cover smaller places like Blean?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
What’s an expansion joint in brickwork?
Brickwork, render and cladding all move a little, so long walls have planned gaps to take that movement. It’s closed with backing rod and a flexible sealant.
Where are you based?
Mr Mastic is based in Crawley. Our applicators cover Blean.
How long will you be here?
A typical job takes a few hours for a handful of joints, longer for a whole elevation, including the preparation. Your quote will say how long we expect yours to take.
Are you fully insured?
Yes. We’re fully insured, with over 20 years’ experience in sealant work.
Do you seal joints where cladding meets other materials?
Yes. Different materials move at different rates, so a flexible sealant is needed where they meet. We choose one that suits both surfaces.
Do the sealants smell?
There can be a smell while the sealant cures, which fades as it sets. Ventilation helps.
How the job changes by surface
Cladding and façade panels
Panel systems often rely on sealant between and around the panels. We reseal them with a sealant suited to the panel material.
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.
What external mastic looks like in Blean
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you let a flat or house near Canterbury West station, outside joints that have cracked can let damp into a rental, so check them between lets. In the older streets around Church of St Cosmus and St Damian, old and new materials meet at the roofline and walls, which is where sealant earns its keep. If you look after a building such as Blean Primary School, larger buildings have long runs of movement joint that eventually need resealing.
Blean is about 3 miles north-west of Canterbury, in Kent. Anywhere in CT2, our applicators can take on external mastic. Across Kent, we cover 922 places, Blean among them. There’s also a page for Chelmsford, roughly 38 miles from Blean.
Our applicators cover all of CT2 for external mastic. If you need external mastic at a property on Westfield, School Lane and Vicarage Lane or anywhere close by, we can help. Main roads around Blean include the A290, so getting to you is simple. Other places close to Blean include Honey Hill (1 mile north-west), Tyler Hill (1 mile east), Denstroude (1 mile north-west), Hackington (1 mile east) and Yorkletts (2 miles north-west). We also work in nearby towns such as Ashford (14 miles south-west), Canterbury (3 miles south-east), Sittingbourne (14 miles west), Whitstable (3 miles north), Faversham (7 miles west) and Herne Bay (6 miles north-east).
Near you in Blean
In Blean, that means homes and buildings near The Archbishop's School, Tyler Hill Meadow and St Edmund's School, among other places. For rail, the closest station is Canterbury West station, about 2.1 miles south-east. Well-known places in the area include Sidney Cooper Museum (2.3 miles south-east) and Eastbridge Hospital of St Thomas the Martyr (2.4 miles south-east). Not far away are Blean Woods RSPB Reserve.
What we do, step by step
Once we’re on site, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. After that, the work takes anything from a few hours to several days, depending on the building. In a small place like Blean, access is generally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- First we look over the joints with you, agree which to renew and talk through access.
- The old mastic and anything lodged in the joint is removed.
- The joint faces are cleaned and primed where the sealant needs it.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Before we arrive
- Where the joints are inside, avoid wetting them before we arrive
- Tell us about any water getting in
- Tell us if parking is tricky
Ask for a quote
Want a quote for external mastic? Please ring 0345 464 0079 or email us with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.