West Sussex · England
Rusper External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for Rusper, backed by a one-year guarantee. Ask us for a quote.
- Water getting into walls through failed joints
- Rigid filler in a joint that should flex
- Panel joints letting water in
How we handle external mastic in Rusper
A movement joint is only as good as its depth. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, so it bonds to the two sides only and can stretch. Typical jobs include plants rooting in failed movement joints and panel joints letting water in, on brickwork movement joints, concrete & block and joints between brick and frames.
Somewhere as small as Rusper, homes and farm buildings often face open ground, so walls and rooflines take the full force of wind and rain. Gutter joints and wall joints there need a sealant that can flex and stay put.
You are covered for a year from the day we finish. If anything is not right with it, ring 0345 464 0079 or email us.
- Location
- Rusper (RH12)
- Wider area
- West Sussex
- Cover
- One year on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What we do, step by step
Most of a good job is in the preparation, and we do not rush it. Joints are cleaned back and dried before anything new goes in. In total, it usually takes a few hours to a few days, depending on the length of joint and the access. In a small place like Rusper, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Preparing for the visit
- Clear items away from the joints we’re working on
- Let us know if you’ve seen damp or leaks
- Tell us about access, such as stairs, a lift or high-level joints
How to get a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
Related advice
What external mastic looks like in Rusper
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.
In the older streets around St Mary Magdalene church, older walls, gutters and the joints where extensions meet them need a flexible sealant. Rented homes near Faygate station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets.
Rusper is about 4 miles west of Crawley, in West Sussex. Our applicators cover external mastic for homes and businesses in Rusper and the surrounding area. Rusper is one of 371 places in West Sussex we cover.
All of RH12 is covered for external mastic, from the main roads to the quietest streets. Local streets include High Street, Cooks Mead and Chalice Walk. If you are just outside Rusper, we cover Lambs Green (1 mile east), Ifieldwood (2 miles east), Russ Hill (3 miles north-east), Bewbush (3 miles south-east) and Cudworth (3 miles north). Within a short drive, we also cover Crawley (4 miles east), Horsham (4 miles south-west), Haywards Heath (12 miles south-east), Burgess Hill (13 miles south-east), East Grinstead (12 miles east) and Broadfield (4 miles south-east).
Landmarks near Rusper
For rail, the closest station is Faygate station, roughly 1.8 miles south of the centre. Well-known places in the area include Crawley Museum (3.9 miles east) and Crawley Hospital (3.6 miles east). For a walk, there’s Vann Lake and Warnham LNR.
Questions from Rusper
Will you come out to Rusper?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you work for landlords with property near Faygate station?
Yes, we work for letting agents and landlords. Just phone 0345 464 0079 or drop us an email and tell us about the property, and we’ll give you a clear quote.
Why do you put foam in the joint first?
The foam is closed-cell backing rod. It stops the sealant going in too deep and bonding to three sides, which would stop it stretching.
Will it make a mess?
Tidy work is part of the job. We protect what’s around the joints.
How long before the joint can be used?
It depends on the product and the conditions. Before we leave, we will tell you the cure time.
Do the sealants smell?
It depends on the product. Some products have a noticeable smell, others very little.
Do you have insurance?
Yes. Mr Mastic is fully insured, and we have been doing sealant work for more than 20 years.
How long does the job take?
That depends on how much there is to do, but as a guide it takes a few hours for a handful of joints, longer for a whole elevation. We’ll give you a better idea when we quote.
Towns and villages near Rusper
What else we do in Rusper
Honest limits
Before you book, it’s worth knowing the limits too:
- Loose or hollow render, which needs re-rendering
- Subsidence or other structural problems
- Cracking across the wall rather than at a joint
Not sure which it is? You can call 0345 464 0079 or drop us an email and we’ll tell you honestly.
Surfaces we seal
- Render & cladding joints
- Brickwork movement joints
- Copings & trims
- Façade panels
- Joints between brick and frames
- Concrete & block
Common problems we fix in Rusper
Sometimes a movement joint was filled with mortar or a rigid filler, often by someone who didn’t know what it was for. The joint can’t move, so the wall cracks somewhere else instead.
The problems people generally mention when they call are:
- Rigid filler in a joint that should flex
- Gaps where render, brick and frames meet
- Old sealant gone brittle and cracked
- Plants rooting in failed movement joints
For site and facilities teams at buildings such as Rusper Primary School, its movement joints, gutters and trims need looking after like any other building’s.
Before booking anyone
- How the surfaces are prepared before sealing
- What product goes in the joint
- How long to leave it before use
- Whether all the old sealant comes out first
Surface by surface
Copings and trims
Coping and trim joints face rain and sun head on. We reseal them with an exterior sealant suited to the material.
Render joints
Render has movement joints and stop beads that need sealing. They’re resealed in a sealant that suits the render.
How to look after the new joints
Aftercare is simple, and it makes a real difference:
- Never let anyone fill a movement joint with mortar
- Clear growth from the base of walls and joints
- Check external joints each spring
- Point out the joints to other trades
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They must stay as flexible joints, never rendered or pointed over.
Once a joint can’t move, the wall finds another way, generally as cracking in the brickwork or render nearby. Catch it early and you reduce the risk.
Quotes for external mastic in Rusper
You’ll get a clear quote before work begins. It’s based on:
- Whether old sealant or filler has to be cut out
- The number and length of the joints
- Whether there’s mould to deal with
- Whether the work is at height
A few things move the cost up or down: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. Your quote takes all of that into account.
Helping us quote
When you call or email, these details help:
- Where the property is
- Whether it’s a home or a business
- Any previous sealing or DIY work
- Photos by email, if that is easy
To get a quote, ring 0345 464 0079 or drop us an email with the location and a short description of the problem. You’ll have a clear quote before we start.
Can I do it myself?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so tell us about it when you ask for a quote.