Greater London · England
Bulls Cross External Mastic
Movement joints in Bulls Cross need attention? We cut out the old, prepare the joints and apply the right sealant.
- Weeds or debris growing in open joints
- Water getting into walls through failed joints
- Gaps where render, brick and frames meet
Leave it or put it right?
Sealing over the top of old mastic does not hold for long. The new layer cannot bond properly to old, weathered material, so we always take the old sealant out. In a flat in Bulls Cross, failed sealant seldom stays inside your own four walls: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
The cost reflects the work involved, not guesswork. That is why we ask about the job first.
Why Bulls Cross customers choose us
- Rated 4.9 stars on Google
- A 12-month guarantee on all work
- Anti-fungal sanitary silicone in wet areas
- A choice of colours where the product allows
Read how sealant jobs are priced and customer reviews.
External mastic for homes and businesses in Bulls Cross
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. The colour is chosen to suit the brick or render so the joint doesn’t stand out. We work on brickwork movement joints, joints between brick and frames and façade panels, and people most often call us about weeds or debris growing in open joints and damp patches traced to an open external joint. Need a sealant company near Bulls Cross? Mr Mastic covers Bulls Cross, fully insured and ARBOMaster approved.
Working on the outside of a London home means planning access: shared paths, upper floors and parking. In Bulls Cross, joints up high may need ladders or other access, which is worth talking through when you book.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Place
- Bulls Cross (EN1, EN3, EN8)
- Region
- Greater London
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Call
- 07833 053749
- Updated
- 26 October 2026
Bulls Cross questions
Is parking a problem for a job in Bulls Cross?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. The visit is then planned around what’s available.
Do you cover Bulls Cross for external mastic?
Yes, Bulls Cross is within the area we cover. Our work covers London and the South East. You can phone 07833 053749 or send us an email and tell us what needs doing, and we will send you a clear quote.
Should I point up the gap in my brickwork?
No, not if it’s a movement joint. Pointing it stops it working and can lead to cracking. A flexible sealant is the right fill.
Do you seal joints where cladding meets other materials?
Yes. Where different materials meet is one of the most common joints we seal. The sealant is chosen to bond to both sides, primed where needed.
How much does external mastic cost in Bulls Cross?
We don’t publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. You will get a clear quote before any work starts.
Are you fully insured?
Yes, we are fully insured for domestic and commercial work.
I’m a tenant. Can you help?
We are happy to deal with the tenant, landlord or agent. Just make sure your landlord agrees.
Can you work on commercial sites?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. Working times can be discussed when we quote.
Towns and villages near Bulls Cross
Also in Bulls Cross
What external mastic looks like in Bulls Cross
Historic houses like Forty Hall (about 0.7 miles south-west) are a reminder that the area around Bulls Cross has older buildings as well as new. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material. In terraces and conversions, gutters and walls are often shared with the neighbours, so check who is responsible for the outside before booking.
Letting a property close to Turkey Street station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies. For site and facilities teams at buildings such as Capel Manor Primary School, larger buildings have long runs of movement joint that eventually need resealing.
Bulls Cross is about 2 miles north-east of Enfield, in Greater London. For external mastic in and around Bulls Cross, it’s easy to get a quote: please call 07833 053749 or send us an email. We cover Greater London from our Crawley base. Our area takes in 786 places across Greater London, large and small.
Our applicators cover all of the EN1, EN3 and EN8 postcode area for external mastic. Local streets include Capel Road, Kempe Road and Yews Avenue. Bulls Cross is on the M25, so it’s easy for us to get to. Nearby, we also carry out external mastic in Bullsmoor (1 mile east), Forty Hill (1 mile south), Enfield Wash (1 mile south-east), Clay Hill (1 mile west) and Freezywater (1 mile east). Larger places within reach include London (12 miles south), City of Westminster (12 miles south), Marylebone (12 miles south), Kensington (14 miles south-west), St Pancras (11 miles south) and Shoreditch (11 miles south).
Around Bulls Cross
Locally, jobs take us to homes and businesses close to St Ignatius College, Aylands School and The Pied Bull Public House. For rail, the closest station is Turkey Street station, roughly 0.6 miles south-east of the centre. Other landmarks nearby include Museum of Enfield (2.1 miles south-west) and Edmonton Green Shopping Centre (3.7 miles south). Open spaces near Bulls Cross include Fir and Pond Woods and Bowyer's Water.
What the job involves on each surface
Render joints
Water behind render can lead to blown patches. A sound joint keeps the render dry behind.
Joints between dissimilar materials
Where a frame or panel meets masonry, water often finds a way in. The old joint is removed and a sealant that bonds to both sides goes in.
DIY versus a professional finish
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
What we do, step by step
We keep the work tidy and contained to the area we’re working on, so you can carry on as normal. Expect the work to take a few hours to a few days, depending on the length of joint and the access, and we tell you how long to leave it before we go. In a London area like Bulls Cross, the main things to plan are parking and access: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
Before we arrive
- Let us know if you’ve seen damp or leaks
- Tell us about access, such as stairs, a lift or high-level joints
- Mention any parking rules near the property
Getting a quote
Every job is quoted individually, so start by telling us what you need. Just ring 07833 053749 or drop us an email with the details, and photos are welcome.
Read more
Looking after it afterwards
Simple care keeps the joints in good condition. Our advice:
- Wash walls gently around the sealant
- Look over the joints every year, ideally after winter
- Don’t let climbing plants root in the sealant
- Keep water from gutters off the wall
Have a quick look at the joints each spring. Watch for splits, edges coming away or growth in the joint.
Small splits are the time to act. Then it’s a straightforward cut-out and reseal with no damage behind it to deal with.
Signs you need external mastic in Bulls Cross
Some movement joints have been pointed up with mortar by mistake. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
Most people get in touch when they notice something like this:
- Old sealant gone brittle and cracked
- Failed sealant between panels on a façade
- Failed seals between different materials
- Joints where the bead has come unstuck
In the older streets around Jesus Church, the joints between older walls, newer extensions and the roofline need a sealant that can move.
What to look for in a quote
- Whether they seal over old material or remove it
- What the cure time is
- The length of the guarantee
- What happens if the job turns out different
Honest limits
A few problems are outside what sealant work can do:
- Structural movement, which needs a surveyor or engineer
- Adding movement joints to masonry that has none
- Failed render or damaged cladding panels
If in doubt, call 07833 053749 or drop us an email and we will say what we think.
Where we work in Bulls Cross
- Brickwork movement joints
- Copings & trims
- Concrete & block
- Joints between brick and frames
- Façade panels
- Render & cladding joints