Thurrock · England
Coryton External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Coryton and across Thurrock. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Brick movement joints where the sealant has split
- Failed sealant between panels on a façade
- Gaps where render, brick and frames meet
External mastic in Coryton
Many failed façade joints only get noticed once there’s a stain or a damp patch inside. We inspect them, agree which need doing and reseal with a weatherproof, flexible sealant in a colour to suit. Typical jobs include brick movement joints where the sealant has split and hard, crazed mastic that has stopped moving, on joints between brick and frames, copings & trims and brickwork movement joints.
Somewhere as small as Coryton, homes and farm buildings often face open ground, so walls and rooflines take the full force of wind and rain. Joints on those walls need a sealant that moves with the building and stays in place.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Location
- Coryton (SS17)
- Wider area
- Thurrock
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Common questions in Coryton
Does the coastal weather in Coryton affect outside sealant?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. The right product, a clean joint and the right depth all help it cope.
Is Coryton within the area you cover?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Can you work on commercial sites?
Yes, regularly. Larger jobs can be planned room by room or area by area to suit the site.
Can new sealant go over the old?
No. Fresh sealant does not stick to old sealant, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
What colours does the sealant come in?
Exterior sealants are made in a range of colours, from greys and browns to whites and stone shades. We choose the closest to your brick or render.
Do you work for landlords and businesses?
Yes. Domestic, commercial and hotel work are all part of what we do, and we’re fully insured.
What is backing rod for?
Closed-cell backing rod sets the depth of the sealant and stops it sticking to the back of the joint. That way it bonds to the two sides only and can stretch.
Can I do it myself?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
Different surfaces, different methods
Concrete and blockwork
Concrete and block walls shrink as they dry and move with temperature. We reseal their joints with backing rod and a flexible product.
Copings and trims
Coping and trim joints face rain and sun head on. Each is resealed with a weatherproof, flexible sealant.
Coryton buildings and the weather
Coryton is within about 1 mile 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. The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Rented homes near Benfleet station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets.
Coryton is about 3 miles east of Stanford-le-Hope, in Thurrock. From the centre of Coryton to the outskirts, external mastic is available for homes and businesses alike, from flats and houses to offices and hotels. 26 places in Thurrock are on our list, large and small. You can also see our page for Chelmsford, about 16 miles away.
Jobs for external mastic in SS17 is quoted and booked the same way as anywhere else. Close by, we work in Canvey Island (3 miles east), Bowers Gifford (4 miles north), Pitsea (4 miles north), South Benfleet (4 miles north-east) and Tarpots (4 miles north-east). Within a short drive, we also cover Stanford-le-Hope (3 miles west), Grays (8 miles west), South Ockendon (9 miles west), Balstonia (3 miles west), Chadwell St Mary (6 miles west) and Aveley (11 miles west).
Around Coryton
Coryton’s nearest station is Benfleet station, about 3.1 miles north-east. A little further out are Bay Museum (3.5 miles east) and Basildon University Hospital (3.9 miles north-west). Green spaces nearby include Canvey Wick.
When to call us in Coryton
Every building moves. Brickwork grows a little over the years, blockwork and concrete shrink, and all of it moves with heat and moisture. All of that ends up in the joint sealant.
If you can see any of these, it’s time to have the joints looked at:
- Water getting into walls through failed joints
- Joints with sealant missing in places
- Joints pointed up with cement by mistake
- Sealant pulling away from one side of the joint
In and around Coryton, as anywhere, good external mastic starts with a clean, dry, properly prepared joint.
What to look for in a quote
- Whether you can choose the colour
- Whether all the old sealant comes out first
- Whether VAT is included
- How much experience the applicator has
How we quote for external mastic
Call for a quick quote. The main things that affect it are:
- The amount of work
- The product the joint needs
- Any mould that needs treating
- Any working-time requirements on site
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
What we need to know
To make quoting easier, let us know:
- Any access issues, like height or stairs
- Whether it’s a home or a business
- Pictures of the joints, sent by email
- The problem you’ve noticed
If you’re in Coryton and need external mastic, call 0345 464 0079 or email us. Tell us what the problem is and where, and you will get a clear quote before work begins.
Why act early in Coryton
Done well, a resealed joint is a neat, straight line that suits the wall. A hurried job with smeared edges and no backing looks worse and fails sooner. Older cottages and farmhouses around Coryton can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you’re unsure, call 0345 464 0079 or email us for an honest opinion and a quote.
Why choose Mr Mastic in Coryton
- A sealant colour to suit the surroundings
- Anti-fungal silicone where joints get wet
- 12-month guarantee on every job
- Arbo and Everbuild products
Read what affects the cost and customer reviews.
What sealant work can’t fix
Before booking, it’s worth knowing the limits:
- Rising or penetrating damp from elsewhere in the wall
- Cracking across the wall rather than at a joint
- Cutting new joints into brickwork, which is building work rather than sealant work
Not sure which it is? You can call 0345 464 0079 or send us an email and we will tell you honestly before you book.
Where we work in Coryton
- Brickwork movement joints
- Concrete & block
- Façade panels
- Copings & trims
- Render & cladding joints
- Joints between brick and frames
How the visit works
There’s no need to move everything out before we come, just the space around the work. Everything nearby is protected, and the work takes a few hours to a few days, depending on the length of joint and the access for a typical job. Somewhere as small as Coryton, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- The faces are brushed clean and primed where the product requires it.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
Preparing for the visit
- Clear the area around the work
- Tell us if parking is tricky
- Where the joints are inside, avoid wetting them before we arrive
How to get a quote
Asking for a quote is easy: let us know the job and the location, and roughly how big it is. A few pictures by email make the job easier to understand, and we will come back to you with a quote.
Related advice
Also near Coryton
Also in Coryton
DIY versus a professional finish
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly, so just mention it when you contact us.
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.