Greater London · England
Commercial sealant contractors in SE5
We cover every part of the SE5 postcode district, which takes in East Dulwich, Camberwell and Denmark Hill. Failed sealant is always cut out completely, with a 12-month guarantee.
Sealant work in SE5
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
Where we work in SE5
What we do in SE5
- Mastic sealing for building owners and managing agents
- Construction and new-build mastic
- Commercial washroom and wet-area sealing
- Expansion and movement joint sealing
- Fire-rated sealing and fire stopping
- Commercial sealant contractors
- Industrial and floor joint sealing
- Coloured and colour-matched sealant
- Facade and window perimeter sealing
- Every service
Tell us what needs doing and your postcode for a fixed quote: speak to us on 01277 525 020 or email drawings and photos.
About commercial sealant contractors in SE5
A reseal stands or falls on the preparation underneath it. Silicone has no grip on cured silicone, so the failed bead is cut out completely, then both faces are cleaned back to sound, dry material with no dust or grease on them. Where the sealant maker specifies a primer for that substrate, it goes on before the new bead, and a backing rod limits the depth to give the sealant room to work. We work on movement joints in walls and floors, window and door perimeters and floor and threshold joints, and the usual reasons a site gets in touch are black mould through washroom sealant that won’t clean off and hardened, chalky sealant on south-facing or exposed elevations.
Before we leave any area, we remove the tape, clean down and inspect every joint, ready for your sign-off. Where the sealant needs time to cure before use, we tell you and sign the area.
- You send photographs, drawings or a list of the joints and areas involved, and a site visit is booked where it helps.
- Next comes a diagnosis and a fixed quote.
- We plan around your site hours and access windows, phasing the work where areas have to stay in use.
- Failed sealant is cut out and each joint cleaned back to sound, dry faces.
- The depth is set, primer is used where the maker calls for it, and the fresh bead is applied and tooled.
- Finished joints are checked with you and handed over with our 12-month guarantee.
How we quote
The product called for affects the cost, as does the preparation each joint needs, from cutting out to priming and backing rod. Access, phasing and site requirements come into it too.
Why clients in SE5 choose us
- Constructionline member
- CHAS accredited
- Colour options checked against the specified product
- One number for every site we cover
Ask for a quote
Need a figure for a tender or a budget? We’ll quote against your scope and drawings you can plan around. If you have questions first, call the office on 01277 525 020 or email a schedule or drawings.
Local landmarks in East Dulwich
Locally, jobs take us to sites close to The Charter School, Dog Kennel Hill School and Brunswick Park and the streets around them. Also close by are The Fox on the Hill pub (less than half a mile north-west), The Latter Rain Outpouring Revival Church (less than half a mile north-east) and The Charter School East Dulwich (under half a mile south-east). East Dulwich has its own railway station: East Dulwich station. Well-known places in the area include House of Dreams Museum (under half a mile south-east) and Surrey Quays Shopping Centre (2.8 miles north-east). Green spaces nearby include Knight's Hill and Centre for Wildlife Gardening.
Shops, offices and hotels in SE5
The commercial stock in SE5 mixes older town-centre buildings with newer offices and units, in places such as East Dulwich, Bermondsey and North Brixton and beyond. Surfaces decide the sealant, from masonry to powder-coated frames and shop-fit panels.
All of Greater London is inside the ULEZ, and much of the South East is within easy reach of the capital, and every job in SE5 starts with access, parking and site rules.
East Dulwich: In a retail centre such as Cantium Retail Park, 1.7 miles to the north-east of East Dulwich, new tenants mean new shop fits, and the sealant at counters, frontages and floor edges is part of the finish. If you have premises on more than one site, say at Goose Green Trading Estate and Bellenden Road Business Centre, one contractor and one quote can cover both.
Keeping the joints sound
After handover, these steps help:
- Log reseals in the O&M or maintenance records
- Act on the first lifting edges rather than waiting
- Ask cleaners to use a soft cloth and mild cleaner on sealant
- Add sealant to the planned maintenance inspection list
In washrooms and kitchens, extraction makes a real difference to sealant life. Fans that are broken or switched off leave joints damp for longer, and mould follows damp. It’s worth having fans checked while the sealant is fresh.
Once sealant fails in a movement joint, grit and debris get in. The joint can no longer close, so its edges crack or spall. That turns a sealant job into something bigger.
When it isn’t the sealant
Not every problem is a sealant problem, and we’d rather tell you before you spend money. These need a different solution:
- Leaking roofs, gutters or flat-roof membranes (those need a roofer)
- Broken glass or blown double-glazed units
- A dripping trap, valve or pipe behind a fitting
Site staff or a sealant specialist?
There’s also the paperwork. Main contractors and clients often ask for CSCS cards, RAMS and insurance details, and we’ll confirm the paperwork you need with the quote.
Certain joints really need a specialist: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. A poor seal in places like these tends to cost more to put right later.
Why it fails
When a bead peels cleanly off one face, it has failed in adhesion. The usual causes are poor preparation, a missed primer, contamination on the joint face or sealant bonded to the base of the joint. We see it often where joints were sealed in a hurry.
Site and facilities staff are often the first to spot these:
- Messy, uneven beads from earlier work that let the building down
- Shrunken sealant along kitchen worktops and splashbacks
- Damp patches where an external joint has failed
- Frame mastic that has hardened and come away from the wall
How the job changes by surface
Fire-rated seals where specified
Where the specification calls for fire-rated or intumescent sealant around service penetrations or linear gaps, we install it to the product’s tested detail. Fire-stopping design and sign-off sit with the designer, fire engineer or building control; we install what’s specified.
Washrooms and toilets
Black sealant in a toilet block is normally beyond cleaning. Replacement is the fix: strip, clean, dry and reseal, room by room if that suits the building.
Questions we are asked in SE5
Do you work to architects’ specifications?
Yes. Send it with your enquiry, and we’ll price the work to it.
How long before the joints can be used?
We’ll confirm how long the chosen product needs to cure, and flag anything to keep off until it has cured.
Are you CHAS accredited?
Yes. We are CHAS accredited, we are a Constructionline member and we use CSCS-carded applicators.
Do your applicators hold CSCS cards?
Yes. Should the site need card details in advance, let us know and we will send them with the quote.
Do you check for asbestos before removing sealant?
It’s possible in older buildings, especially those built before 2000. Before cutting anything out, we ask for the asbestos register or survey, and if something is suspected, work stops until it’s tested.
Does the weather affect the work?
It can, for external work. Sealant won’t bond properly to a wet or frosty joint, so external work may be moved if conditions aren’t right. Internal work is far less affected.
How long does a job like this take?
We plan the time on site around your programme and access. You’ll have an expected duration with the quote.